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Fedora 16

Amateur Radio Guide

A guide for users of Fedora amateur radio software


The Fedora Documentation Project

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Fedora includes a wide range of applications relevant to amateur radio operators. This guide describes the use of some of those applications

1. Introduction
2. Sound Card Modes
2.1. linpsk
2.2. lpsk31
2.3. fldigi
3. Rig Control
3.1. Chirp
3.2. grig
4. Logging and related applications
4.1. qle
4.2. xlog
5. Antenna and Propagation Modeling
5.1. splat
5.2. xnec2c
6. Packet and APRS
6.1. colrdx
6.2. xconvers
6.3. xastir
7. Circuit Design and Simulation
7.1. gEDA
7.2. gerbv
7.3. pcb
7.4. gspiceui
8. Miscellaneous Applications
8.1. CuteCW
8.2. dxcc
8.3. gpredict
8.4. gresistor
8.5. ibp
8.6. rcrpanel
8.7. xgridloc
8.8. xwota
A. Installing Software on Fedora
A.1. Installing Software with the GUI
A.2. Installing Software with yum
A.2.1. Searching for Software
B. Revision History

1. Introduction

Amateur radio and Linux go hand-in-hand. Both allow users to experiment to the extent of their knowledge and to learn more along the way. With new digital technologies being used everyday open source software is the best way to stay cutting e dge in this ever-changing hobby.
Fedora has packaged dozens of software to make it easy for Fedora users to obtain and setup. Within seconds any user w ill be able to have the tools they to enhance their amateur radio experience.

2. Sound Card Modes

This section describes the sound card modes.

2.1. linpsk

yum info as placeholder:
Description: LinPsk is a program for operating on digital modes running on
           : Linux. LinPsk supports BPSK, QPSK and RTTY at the moment.
           : Main features are:
           : * the simultaneous decoding of up to four channels.
           : * The different digital modes may be mixed
           : * You can define a trigger on each channel to be notified if a text
           :   of your choice is detected.
           : * You can log each received channel at a file.
           : * For easy qso'ing you can define macros and for larger texts to be
           :   send you can use two files.
           : * You can view the signal as spectrum or in a waterfall display.
           :   Both are scalable in the frequency domain.
           : At the Moment RTTY only supports 45 baud and 1.5 stopbits.

2.2. lpsk31

yum info as placeholder
Description: lpsk31 is a ncurses console application for ham radio
           : communications in the popular PSK31 digital mode. lpsk31 uses only
           : integer arithmetic for both signal detection and audio tone
           : synthesis, so that it needs no floating point calculations for its
           : operation. lpsk31 can keep a log of QSO's in text and ADIF format
           : as well as a raw log of all that is typed in the transmit window or
           : displayed in the receive window.

2.3. fldigi

fldigi is one of the most robust soundcard modem software around. It supports CW, DominioEX, Feld-Hell, MFSK, MT-63 PSK, OLIVIA, RTTY, Thor, and Throb. fldigi also includes, as part of the software, a logger which is smart enough to almost complete itself.
fldigi receiving PSK-31
Figure 1. fldigi

3. Rig Control

This section describes rig control applications.

3.1. Chirp

chirp is an application that allows programming of radios from a number of vendors. Chirp assumes that the appropriate cable is available and connected. Data may be saved to a .csv file for manipulation by other applications, as well as transferred between radios, even radios from different manufacturers.
chirp is started by clicking the chirp icon.
Chirp icon
Chirp Icon
Figure 2. Chirp icon

This will present a rather uninteresting blank screen.
In most cases, the user will wish to begin by selecting Download from Radio from the Radio menu. This will launch a dialog requesting some basic information such as the desired serial port, radio vendor and model. Note that the selected serial port must permit read/write access.
Chirp Radio Dialog
Chirp Radio Dialog
Figure 3. Chirp Radio Dialog

Clicking the OK button will begin reading the radio's memory.
What happens next depends on the radio. For radios that operate in "live" mode, the values will appear in the window, and values at the bottom of the window will show how many memories remain to be read and how many have been read. For radios with multiple bands, the first value will alternate between bands.
Chirp Main Screen
Chirp Main Screen
Figure 4. Chirp Main Screen

For radios that do not operate in "live" mode, a small window containing a progress bar will show the progress of the download. The data will appear after the data has been downloaded.
Chirp Main Screen
Chirp Main Screen
Figure 5. Chirp Main Screen

To change a value, simply click on the field and begin typing.
Changing a memory location
Changing a memory location
Figure 6. Changing a memory location

On some radios, data is changed in the radio as soon as it is changed onscreen. For others, it will be necessary to select the Upload to Radio from the Radio menu.
Chirp Main Screen
Chirp Main Screen
Figure 7. Chirp Main Screen

A progress bar will be displayed similar to that displayed during data download.
Chirp Main Screen
Chirp Main Screen
Figure 8. Chirp Main Screen

By default, only the first 25 memories are displayed. Near the top of the screen the Memory range controls allow for selecting those memories to be displayed. If a large number of memories are selected, it may take some time to display.
Selecting Memory Range to Display
Figure 9. Selecting Memory Range to Display

Depending on the radio, there may be quite a few columns to display, so maximizing the window could be helpful.
Large Display
Figure 10. Large Display

Individual columns may be removed from the display, making the display more manageable.
Selecting Columns
Figure 11. Selecting Columns

3.2. grig

grig is a simple front panel for a radio controlled by hamlib. Before using grig the user should first configure hamlib.
To start grig, click the grig icon:
grig icon
Figure 12. grig icon

The main window allows for control over most of the actions accessible from a typical radio front panel. Frequency may be increased or decreased by left or right clicking the appropriate digit in the frequency display. Other controls are more or less self-explanatory.
grig main window
Figure 13. grig main window

4. Logging and related applications


4.1. qle

qle stands for QSO Logger and Editor. It is a simple yet flexible logging program. qle uses a lightweight sqlite database that can be manipulated using standard tools. The application is easily customized, so you can have the logging program behave the way you want. It also interfaces with hamlib, so information may be automatically retrieved from your rig with the appropriate hardware.

4.1.1. Installing qle

qle can be installed with yum like any other package:
sudo yum install qle
However, qle requires some initial setup before it may be used.

4.1.2. Configuring qle

The install process creates a configuration file /etc/qle/qle.conf which must be edited. This can be done with your favorite text editor, however, the file is protected against writing by a non-admin user. The file might be edited with something like:
sudo gedit /etc/qle/qle.conf &
There are two lines that must be changed. At line 63 of the file, you will find the lines:
debug = 0
myCall = N0CAL
Be sure that the debug line is set to zero and change the myCall line to reflect your callsign.
The second line that must be changed is at line 75 where you will find:
# Filename of SQLite DB with full path.
# This file requires sufficient RW access for the DB to work...
db = foo3.db
# Name of the table that you want to log into.
# Is probably case-sensitive:
tableName = mycall
You must change the name of the database to your desired name and location.
qle is set up for a single user system, so all users share the same database. You must place the database in a location where it can be accessed by any users requiring it. If you always log on with the same usercode, you might choose to put it in a hidden subdirectory off your logon directory, for example, ~/.qle. This is the simplest approach, but in some circumstances, you may prefer a more "global" location, for example, /etc/qle. In this case, you need to take care to give the file appropriate protections.
For simplicity, we will assume that qle will only ever be run from a single usercode and we will put the database there. Reflect that location and name in qle.conf, for example:
db = /home/usercode/.qle/qle.sqlite
Note that you cannot use the tilde (~) within the config file, you must enter the entire path.
There are many things you may wish to change. For example, at line 101:
useRig = 1
determines whether you want to use the rig control library, hamlib, which can be a great convenience if you have the appropriate hardware.
At line 225:
noCwDaemon = 0
determines whether you wish qle to have the capability of keying the transmitter.
To avoid describing hamlib settings and hardware setup, we will assume these are both disabled for now, that is, useRig=0 and noCwDaemon=1.
After editing qle.conf, you need to create the database. There is a sample database in /usr/share/qle so we can copy that to the location we have specified for our database:
cp /usr/share/qle/foo3.db ~/.qle/qle.sqlite
This file has some test data which we will delete after some initial testing.

4.1.3. Running qle for the first time

The first time you run qle, it should be done from the command line in debug mode to be sure you made no errors in the config file:
qle --debug=1
If there were errors editing the configuration file, they will appear in the window from which you started qle. If all went well, this should result in seeing the logging windows with the test data displayed:
Running qle the first time
qle - Initial run
Figure 14. Running qle the first time

The qle "Main Window" shows the QSOs that have been logged so far. It will contain QSOs from the sample database. We will delete those QSOs later.
qle Main Window
qle - Main Window
Figure 15. qle Main Window

The "Sub-Window" is actually where the data will be entered for each QSO. Some fields are provided automatically, such as the date and time. These will be a lighter color than the other fields. Each field has a button to the right indicating how that field is to be treated. Fields that have the label CAR will be carried over from QSO to QSO. These can be overwritten, but will initially be filled in with data from the previous QSO. These are things like Mode, Power, etc that tend not to change.
qle Data Entry Window
qle - Data Entry Window
Figure 16. qle Data Entry Window

If you wish to change the data in a field that has the label LCK, you may simply click on LCK and select another choice from the dropdown. Normally, you might choose --, but if you are contesting, the NR SENT field includes a +1 choice.`
Changing Field Attributes
Field Attributes
Figure 17. Changing Field Attributes

If you double-click an existing QSO in the Main Window, an Editing Window will appear, allowing you to make changes to the existing QSO.
Editing an existing QSO
qle - Editing QSO
Figure 18. Editing an existing QSO

To exit the program, click the Exit Program button at the lower left of the subwindow.
Exit Program Button
qle - Exit Program
Figure 19. Exit Program Button

qle will ask for confirmation when exiting.

4.1.4. Deleting Sample Data

Now that you are familiar with the basic operation of qle, you will want to delete the original sample data so the database only contains your QSOs. Since the data is in a sqlite database, we merely need to use some simple commands to do that:
[jjmcd@Aidan .qle]$ sqlite3 ~/.qle/qle.sqlite
SQLite version 3.6.20
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> DELETE FROM mycall;
sqlite> .quit
[jjmcd@Aidan .qle]$
If you are familiar with SQL, you can also use sqlite to make other changes and queries.
You are now ready to begin using qle. Click on the qle icon, typically found in the "Internet" group.
qle icon
qle icon
Figure 20. qle icon

4.1.5. Duplicate Checking

qle provides duplicate checking as the call is entered. When the first character is entered, any calls in the log that match are shown in the duplicate window:
Dupe Sheet - first character
Dupe checking first letter
Figure 21. Dupe Sheet - first character

As additional characters are entered, the list gets shorter:
Dupe Sheet - second character
Dupe checking second letter
Figure 22. Dupe Sheet - second character

Dupe Sheet - third character
Dupe checking third letter
Figure 23. Dupe Sheet - third character

In addition to the current log, the file /usr/share/qle/master.scp contains a list of calls to check. These are shown in a separate SCP window:
SCP Window
SCP Window
Figure 24. SCP Window

Like the dupes window, this list gets shorter as you type. Edit master.scp to include the calls you want.

4.1.6. Some customizations you probably want

qle is highly customizable. In the previous sections, we described a few things that definitely need to be changed. There are quite a few more you probably want to change.
At the bottom of the secondary screen you will notice a bar with some information:
Subwindow Info Bar
qle Subwindow Info Bar
Figure 25. Subwindow Info Bar

This bar is simply a reminder for some random data you may want to keep handy. You can change the information by editing the lines starting at line 1051 in the configuration file:
infoString = "ARCI: 10114"
infoString = "LOC: EN73vp"
infoString = "ITU: 8 "
infoString = "CQZ: 4 "
You may find that you want the default field types to be different. For example, suppose you constantly change power and you don't want the previous power to be shown by default. At line 384 of the configuration file is a line for each field with the default type. You can simply change this to make qle start with the type you desire:
fieldTypes =		"---"            # mypwr
You can even adjust individual colors to make them as appealing (or as horrible) as you prefer:
Colors only a mother could love
qle Colors Example
Figure 26. Colors only a mother could love

There are literally hundreds of adjustments you can make to tailor your logger to behave exactly the way you want. Just be sure to carefully review the comments in qle.conf so you don't get unexpected results.

4.2. xlog

xlog is a wonderful logging program that allows the user to create multiple logs, import and export in various formats, and maintain a count on the various awards such as WAS, WAC, DXCC, WAZ, and IOTA. Future versions will contain code to hook into the ARRL's LoTW.

4.2.1. Installing xlog

xlog is simply installed like most applications:
sudo yum install xlog

4.2.2. Starting xlog

xlog may be started from the menu by selecting Applications->Other->xlog or from the command line by typing xlog.

4.2.3. Setting up xlog

xlog is extremely easy to get setup. After starting xlog, select Settings->Preferences. This will bring up a preferences box where you can configure most options for xlog.
The General tab contains basic information on how the log will be setup including the modes and bands you operate. You can change these at anytime but it is good to go ahead and add or remove the modes and bands you don't operate to simplify the operation of the logging later. You can also enable the clock on the status bar and recording of azimuth and distance when you enter in the location of the station. You can also control out data from external programs, such as gmfsk and ktrack, are handled.
The Info tab contains information on your station and preference to miles or kilometers and where you want the software to look up a callsign. It is recommended that you enter your callsign and your coordinates into the fields located on this tab so the log can appropriately annotate your callsign where necessary and can provide azimuth and distance to a station upon entry of the state or grid. If you don't know your latitude and longitude you can just enter your grid locator and the software will populate a rough location for your station.
The Hamlib tab allows you to setup xlog to read your radio so your log will automatically record the frequency and mode. xlog will also display the S-meter on the status bar for your convinence.
The Logs tab allow you to setup the logs themselves. This includes where to store the logs, which logs to start automatically upon starting xlog, when to save the log, and the font. By default, xlog stores your logs in ~/.xlog. This can be changed by providing the appropriate path. If you have multiple logs you can type in the names of each log separated by a comma in the next field and xlog will load those logs each time using tabs at the top of the main screen. The next field asks if you want xlog to save the log whenever you write a log entry or every x minutes. You can also establish a backup of your logs in a separate directory which you can provide in the backup entry. The last field is used to select the font you would like to use for your logs.

5. Antenna and Propagation Modeling


5.1. splat

splat is a Surface Path Length And Terrain analysis application which can perform path loss calculations as well as generate coverage maps. Primarily intended for VHF/UHF, it can help plan repeater coverage or plan emergency communications strategies.

5.1.1. Installation and setup

Installing splat is straightforward:
	su -c 'yum install splat' Obtaining Terrain Files
Before it can be useful, splat requires files that describe the terrain around the station to be modelled. First, determine the latitude and longitude of the station. Then download the nine terrain files centered on that latitude and longitude from
Unzip the nine files and convert them from hgt files to sdf with the srtm2sdf utility. For example:
	  srtm2sdf N41W082.hgt
Do this for each of the nine files. Those files can now be placed in a directory where you wish to store terrain files, or they can be placed in the directory where you wish to work with splat
If you will be modelling stations over a wide geographic area, you may wish to download and convert additional files. splat will select those files it requires for a particular calculation. Obtaining cartographic boundary files
splat will work with just the terrain files. However, for path loss maps, the resulting maps can be more useful if they are marked with political boundaries and names of towns and cities. For the United States, county outlines can be downloaded from and 'census designated areas' from
For each of these, there are two files, an xxyy_d00.dat and xxyy_d00a.dat, where xx is 'co' for county and 'pl' for place, and yy is a state number. A file of place names can be generated from the 'a' file with the citydecoder utility. For example:
	  citydecoder pl37 >cities.dat
The cities.dat file is simply a list of names followed by latitude and longitude. You may edit the file with a text editor to insert additional places which will be marked on the map with a red dot.

5.1.2. Using SPLAT!

splat can perform calculations for a particular path, or generate a map showing path loss or signal strength over a region. In any case splat needs at least one file identifying the transmitter location. For a specific path, it needs an identical file for the receiver. If you would like signal strength calculations, you will need another file with more details about the transmitter. The QTH file
You tell splat about a particular station (transmitter or receiver) with a qth file. This file has four lines:
  1. The name of the station
  2. The latitude of the station
  3. The longitude of the station
  4. The antenna height above ground
Here is an example qth file:
	  43 38 05
	  84 15 41
The qth file should be named for the station. The name of the file in the above example would be W8KEA-4.qth.
By default, splat uses British units; heights are in feet, distances are in miles. However, invoking splat with the -metric switch will cause it to use metric units. The LRP file
If you would like splat to calculate signal strengths, it needs to know a little more about the transmitter. You provide this information in a file whose name matches that of the qth file but has an extension of lrp.
The lrp file has 9 lines:
  1. Earth Dielectric Constant. If you do not have measured data available, the splat man page has a table that can help you estimate a value.
  2. Earth Conductivity
  3. Atmospheric Bending Constant
  4. Frequency
  5. Radio Climate. This is a code describing the terrain. See the table in the man page
  6. Polarization
  7. Fraction of situations. This and the following line reflect how the Longley-Rice calculations are to be carried out. In the example below, splat will calculate the maximum path loss experienced 50% of the time in 50% of the situations.
  8. Fraction of time
  9. Effective radiated power - power out less feedline loss times antenna gain
	  15.000  ; Earth Dielectric Constant (Relative permittivity)
	  0.005   ; Earth Conductivity (Siemens per meter)
	  301.000 ; Atmospheric Bending Constant (N-Units)
	  145.090 ; Frequency in MHz (20 MHz to 20 GHz)
	  5       ; Radio Climate
	  1       ; Polarization (0 = Horizontal, 1 = Vertical)
	  0.50    ; Fraction of situations
	  0.50    ; Fraction of time
	  126.00  ; ERP
You may leave out the last line in which case splat will calculate only path loss. Making a map of coverage
Coverage map with constrained distance
Coverage Map with constrained distance
Figure 27. Coverage map with constrained distance

Coverage map with unconstrained distance
Coverage Map with unconstrained distance
Figure 28. Coverage map with unconstrained distance

Signal Strength Legend
Signal strength legend at bottom of map
Figure 29. Signal Strength Legend Calculating a point-to-point path

5.2. xnec2c

xnec2c is a GUI wrapper on the popular NEC2 antenna modeling program. The application allows the design of an arbitrary antenna, and displays gain, impedance and other useful results.
xnec2c - yagi
xnec2c display of 6 element 20 meter yagi
Figure 30. xnec2c - yagi

xnec2c displays its output in up to three windows. The first window shows the model the user has provided:
Structure display of a collinear
Figure 31. Structure display of a collinear

The user may rotate the view with the two numeric controls. The X, Y and Z buttons permit views along the three axes, and the curved arrow button returns to the default isometric view.
Selecting Radiation Pattern from the View menu opens the radiation pattern window (Figure 32, “Radiation Pattern Display”). The view may be rotated in the same manner as the structure window. Buttons at the top allow for selection of the radiation pattern or the field pattern display.
Radiation Pattern Display
Radiation Pattern
Figure 32. Radiation Pattern Display

The dB / MHz controls allow for specifying the precise frequency at which the gain is to be displayed.
Selecting Frequency Plots from the View menu opens the frequency data plots window (Figure 33, “Frequency Data Plots Display”). Buttons along the top permit display of SWR, impedance, phase, etc.
Frequency Data Plots Display
Data plots
Figure 33. Frequency Data Plots Display

Clicking on the graph causes the gain, SWR and impedance to be displayed immediately above the graphs for the selected frequency.
More complete documentation is installed with the application and may be found at file:///usr/share/doc/xnec2c-1.5/xnec2c.html after the application has been installed.

5.2.1. Improving calculation performance

When a complex antenna with many segments and many frequency steps is required, the calculation can take some time. xnec2c is able to take advantage of modern, multicore processors by specifying -j <n>, where <n> is the number of subprocesses to spawn. Many multicore processors can create two threads per core, so a command line entry of
xnec2c -j 8 &
can improve performance by almost a factor of eight on a quad core processor.

6. Packet and APRS


6.1. colrdx

Colrdx is a simple client for amateur radio dx-clusters. In a split-screen display you can type commands for the cluster in the bottom part. Messages from the dx-cluster will appear in the main window. There is also a status line at the top with some basic information.
DX Cluster Client
dx cluster client
Figure 34. DX Cluster Client

To start colrdx, open a terminal window and type the command. You must provide your callsign and the name of the packet cluster. Optionally, you may also wish to provide the port:
colrdx -c <call> <nodename> [<port>]
You will see some introductory information from the cluster and spots will begin to appear. You may type commands to the cluster (dependent on the particular cluster). To exit type quit.
There is a manpage with additional details.

6.2. xconvers

xconvers is a client for packet based CONVerse bridges. When selected, xconvers will present a blank screen. Choosing Open... from the Host will open a dialog allowing the user to enter the name and port of the host.
Host open dialog
Screenshot of converse bridge
Figure 35. Host open dialog

Once connected, the user will see conversation on the channel. User input is seen in the lower part of the window and entered into the CONVerse bridge when Return is pressed.
Screenshot of converse bridge
Figure 36. xconvers

Input from different users is seen in different colors. The colors and fonts may be adjusted by selecting Preferences... from the Settings menu.

6.3. xastir

xastir is an APRS application that allows users to send and receive position reports, messages, weather data, and other information over packet radio. Data received is displayed on a map allowing the user to get real-time information about a certain area. The user may also fetch trails from and display them on the map when connected to the Internet.
APRS tracking
Figure 37. xastir

The map may be selected from a large number of sources. Facilities are also provided for drawing fixed items on the map as well as making measurements. The user may make specific queries to weather stations and Igates.

6.3.1. Initial Setup

Select Station from the Configure submenu of the File menu. This will bring up a dialog allowing the user to enter basic station information such as call, location, and symbol to be used.
Station Setup
Station Setup
Figure 38. Station Setup

Selecting Defaults from the Configure submenu of the File menu will elicit a dialog allowing configuration of some common default information, such as whether the station is mobile or fixed and whether to allow IGate traffic.
Figure 39. Defaults

Select Interface Control from the Interface menu. Click Add and select an interface type. then click Add. A dialog specific to the interface type will appear. The image below shows a KISS TNC as an example, but the operator may select Internet servers, GPS devices and other interfaces as well.
Setting up a TNC
TNC Setup
Figure 40. Setting up a TNC

Once interfaces are configured, some small symbols will appear in the status bar toward the lower right of the window. The upper semi-circles represent the various interfaces; different types are shown as different colors. The bottom symbol represents the interface status; green for active, empty for inactive, and red for an error. Between these two symbols an arrow will appear briefly whenever data is being transferred.
Interface Status
Interface Status
Figure 41. Interface Status

6.3.2. Setting up maps

xastir comes configured for a number of online map sources, and the documentation includes pointers to many online map sources. Maps may be vector maps or raster maps, and they may be provided in a number of different formats. In general, maps downloaded and stored locally will be retrieved faster than those retrieved online.
Although raster maps often look better, vector maps typically offer better flexibility and performance. You may select a number of maps and raster maps may be overlaid on other maps. You could, for example, select a satellite image background, overlay it with a vector map of roads, and overlay that with weather radar.
Select Map Chooser from the Map menu. Highlight those maps desired and click Apply to activate the maps.
Map Chooser
Map Chooser
Figure 42. Map Chooser

Click Properties on the Map Chooser to activate the Map Properties dialog. This dialog allows you to select the order in which maps will be layered, and whether areas will be filled (when appropriate).
Setting map layers
Setting map layers
Figure 43. Setting map layers

Often one would like to return to a particular view. Select Map Display Bookmarks from the Map menu to bring up the Map Bookmark display. The user may then type a name for the current view in the New Name box and click Add on that dialog to save that view. In the future, clicking Activate! from this same dialog will return to the selected view.
Figure 44. Bookmarks

The user may select a background color from the Background Color submenu of the Configure submenu of the Map menu. Note that raster maps or filled areas will cover the background color.
Light Background
Light Background
Figure 45. Light Background

Notice that if a light color is selected as a background on a vector map, the stations can sometimes be difficult to see.
Dark Background
Dark Background
Figure 46. Dark Background

But selecting a background too dark makes the map features difficult to identify, while allowing the stations to stand out. A medium color selection will allow the best of both, although certain uses will lend themselves to an emphasis on one or the other.
Select a text style from the Station Text Style submenu of the Configure submenu of the Map menu. By selecting Text On Black stations will stand out better when a light background has been selected.
Text Properties
Text Properties
Figure 47. Text Properties

6.3.3. Tracking Stations

Select Track Station from the Station menu. A dialog will appear allowing the call of a station to be entered. When this station is seen to move, a track will be drawn on the map showing the station's past positions.
Tracking a station
Tracking a station
Figure 48. Tracking a station

If a station which is moving has not been heard from in a while, xastir will use "dead reckoning" to predict where it might be, if dead reckoning has been enabled. Dead reckoning is enabled in the Filter Display submenu of the Station menu. "A while" is configured in the Timing menu item of the Configure submenu of the File menu.
Dead Reckoning
Dead Reckoning
Figure 49. Dead Reckoning

Historical tracks may also be downloaded from the findu website. Select Fetch Findu Trail from the Station menu.
Downloading a findu trail
Downloading a findu trail
Figure 50. Downloading a findu trail

A dialog will appear which allows for the entry of the desired call, as well as two sliders which allow for adjustment of the period for which the trail is desired. It may take some time to download a long trail. The trail will be displayed on the map just as with RF trails.

7. Circuit Design and Simulation


7.1. gEDA

gEDA is a collection of packages for schematic capture, netlist generation, circuit simulation and PCB layout. Included in the geda suite are:
geda-docs - Documentation and example files
geda-gattrib - gEDA attribute editor
geda-gnetlist - Generates a netlist from a gEDA schematic
geda-symbols - A library of symbols for gEDA
geda-gschem - The gEDA schematic capture application
geda-gsymcheck - A symbol checker for schematics
In addition to the geda-utils utilities package, geda-gaf design automation package, and libgeda the gEDA library.
Closely tied into gEDA and mentioned elsewhere in this guide are:
pcb - The printed circuit board layout application
gerbv - Gerber viewer
gwave - The waveform viewer
ngspice - The circuit simulator
gspiceui - A GUI interface for ngspice
geda - gschem
Drawing a schematic with gEDA
Figure 51. geda - gschem

Users wishing to take full advantage of gEDA should consider installing the Electronic Lab group which includes all the above components as well as the electronics-menu package and a number of other useful applications.

7.2. gerbv

grebv is a viewer for Gerber files.
In addition to selectively viewing and coloring Gerber layers, gerbv allows the user to export the image in a number of image formats for publication, as well as RS-274X compliant Gerbers and Excellon drill files.
Viewing a PCB with gerbv
Figure 52. gerbv

7.3. pcb

pcb allows for the capture of printed circuit board layouts.
In addition to purely manual layout, pcb can import netlists from gschem. A large number of footprints are available or the user may develop his own.
Drawing a PCB with pcb
Figure 53. pcb

The application can generate a bill of material and drill file, and in addition to printing various layers can export in a number of popular formats.

7.4. gspiceui

gspiceui is a frontend to a SPICE simulation. The user may choose between the gnucap or ng-spice backends.
A simple simulation with gspiceui
Figure 54. gspiceui

gspiceui can open a netlist produced by gnetlist and run the SPICE simulation without having to know the various SPICE commands.

8. Miscellaneous Applications


8.1. CuteCW

CuteCW is a Morse code training program that not only trains the user in decyphering morse code but also provides methods for increasing their comprehension speed. CuteCW will also sound Morse code out of the computer speakers and will read text out as Morse code.

8.1.1. Installing CuteCW

CuteCW is simply installed like most applications:
sudo yum install cutecw

8.1.2. Starting CuteCW

CuteCW may be started from the menu by selecting Applications->Education->CuteCW or from the command line by typing cutecw.

8.1.3. Using CuteCW

CuteCW is quite easy to use. Eight choices are given to help with your learning experience.
CuteCW welcome screen
Figure 55. CuteCW

In the training mode, CuteCW will help with your recognition of characters, words, and groups. It will also help you increase your speed. In the play mode, CuteCW will read text to you in Morse code, allow you to type out Morse code messages, and even play games.

8.2. dxcc

dxcc is a simple application to give quick information about a DXCC entity. Simply enter the callsign and see the country, WAZ and ITU zones, and other useful information.
dxcc callsign lookup
Figure 56. dxcc

8.3. gpredict

gpredict is an application to show the locations of various satellites. Satellite locations and ground footprints are shown on a map, a polar display showing the user's sky view of the spacecraft is available, and another window shows various details of the orbit. The displays are updated in real time.
gpredict satellite tracking
Figure 57. gpredict

Before using gpredict, the user should select Preferences from the Edit menu and set up station location and display name. (Refer to Figure 58, “Select Ground Station”.)
Select Ground Station
gpredict satellite tracking
Figure 58. Select Ground Station

First, select the Ground Stations tab and click Add New.
A dialog will pop up (Figure 59, “Ground Station Settings”) which will permit entering the station details. Note that by clicking the Select button, the location may be chosen from a list.
Ground Station Settings
ground stations
Figure 59. Ground Station Settings

When complete, be sure to check that the desired station is selected as the Default so it will be displayed on the map (the right column in Figure 58, “Select Ground Station”).
Next, the user should update orbital parameters by selecting Update TLE from the Edit menu. Downloading these values may take a few moments.
By default, a few amateur satellites are shown. The lower portion of the display will show details for the spacecraft currently in view. Orbital parameters for another satellite may be selected from the dropdown to the left of the satellite name.
There are a number of other displays available, and additional groups of satellites may be configured which may be shown in tabs (File -> New module). Clicking on the small downward triangle to the right of the window (Figure 60, “Module Menu”) brings up a menu which permits editing an existing module.
Module Menu
Module Menu
Figure 60. Module Menu

Also available from that module menu is a Sky at a glance selection which brings up Figure 61, “Sky at a glance”, showing which spacecraft in the module will come into view within the next eight hours.
Sky at a glance
Sky at a glance window
Figure 61. Sky at a glance

In the map view, hovering over a spacecraft will display the current position information:
Position Display
Hovering causes display of current position
Figure 62. Position Display

8.4. gresistor

gresistor is a simple application for decoding resistor color codes. Select the number of bands on the resistor and each of the colors of the bands, and the resistor value and tolerance are displayed.
Decode resistor color bands
Figure 63. gresistor

8.5. ibp

ibp is a simple application that shows beacons which are part of the International Beacon Project. A number of beacons around the world transmit at predetermined times. The ibp application shows you which beacons are currently transmitting.

8.5.1. Installing ibp

ibp is simply installed like most applications:
sudo yum install ibp
No additional configuration is required, however, ibp expects that the time on the system is correct. Synchronizing your system with one of the many timeservers is recommended.

8.5.2. Starting ibp

ibp may be started from the menu by selecting Applications->Other->ibp or from the command line by typing ibp.
When ibp is started, by default, two windows will open. The first is a simple text screen showing a list of beacons with the currently transmitting beacons highlighted:
ibp - text screen
International Beacon Project
Figure 64. ibp - text screen

The second window shows a map of the world with a colored dot for each transmitting beacon:
ibp - map
International Beacon Project - map
Figure 65. ibp - map

There are a number of arguments you may specify to affect how ibp behaves when it is started from the command line:
  • -c, --nocolor - causes the text window to be displayed only in monochrome. The graph window is still in color.
  • -m, --morse - In single beacon mode, causes the callsign of the transmitting beacon to be displayed at the bottom of the text window in Morse.
  • -x, --nograph - Don't display the map window.

8.5.3. Running ibp

While ibp is running, the highlighted lines on the text display and the dots on the map will periodically change as different beacons take on the transmitting task.
There are several commands you can enter into the text screen to affect the behavior of ibp:
  • digits 1 through 5 - causes only one band to be displayed. Since one is normally only monitoring a single band at a time this can lead to faster identification of the beacon of interest. This is also useful for visually challenged operators.
  • M - toggles between single band and multi band mode. If a single band was displayed, typing M will cause all five bands to be displayed. If five bands were displayed, the previously selected single band will be displayed.
  • Q - causes ibp to exit.

8.6. rcrpanel

rcrpanel is a command line application wich allows layout of panels for electronic equipment. rcrpanel accepts as input a text file describing the panel. It produces as output a Postscript stream of an image of the panel. The Postscript stream may be redirected to a file, a Postscript printer, or piped to another application such as Ghostscript.
By taking a text description of the panel, rcrpanel allows precise placement of controls and annotation, which can be difficult to achieve with a GUI interface. rcrpanel provides scripting elements for text, controls of various sizes, and even calibrated dials.
Example Panel
Example Panel
Figure 66. Example Panel

8.6.1. Running rcrpanel

rcrpanel accepts a single command line parameter, the input file containing the description of the panel. It produces its output on stdout, which means that in most cases, the user will redirect the output to a file. For example:
rcrpanel mypanel.txt >
There are no command line switches available.
The output image will be centered on a standard size page. The smallest page on which the panel will fit is selected from the following list, in order:
216x179 mm - U.S. Letter
210x297 mm - A4
216x279 mm - U.S. Legal
297x420 mm - A3
279x432 mm - Tabloid
594x841 mm - A1
559x894 mm - D
841x1189 mm - A0
1000X1414 mm - B0

8.6.2. The Input File

The input file contains lines describing the various controls. Most lines are of the form
Command = something
where the spaces around the equal sign are significant, and the command itself is case-sensitive.
Measurements are in units of millimeters. Angles are in degrees. Colors are given as 24 bit C style integers where each byte represents the amount of red, green, or blue.
In general, the order of commands makes no difference. However, the Text command must be immediately followed by a line containing the text to be displayed, and those commands affecting the appearance of a Dial affect the preceding Dial command. Background
This command takes a single color following the equal sign. The entire panel will be filled with this color.
Background = 0xfff5e8
Note, however, that the interior of controls will not be filled with this color, allowing the alignment marks to be viewed for drilling, even if the panel were filled with a dark color.
ControlPhone on a dark background
ControlPhone on a dark background
Figure 67. ControlPhone on a dark background ControlLarge
This is used for large diameter controls such as large pots and the like. It takes 2 values after the equal sign representing the position of the control on the panel.
ControlLarge = 23.0 30.0 ControlLED
This command generates an outline for a 5 mm LED. Like the other control commands, it takes 2 values, the X and Y positions on the panel of the center of the LED. ControlPhone
This is used for 1/4" phone jacks and similar controls. The 2 values after the equal sign represent the position on the panel. ControlSmall
This command generates an outline for a 3.5 mm phone jack. The two values are the X and Y positions of the jack on the panel. ControlTiny
This command generates an outline for a 2.5 mm phone jack. The two values are the X and Y positions of the jack on the panel.
ControlTiny = 75.0 30.0
Large, Phone, LED, Small and Tiny controls
Large, Phone, LED, Small and Tiny controls
Figure 68. Large, Phone, LED, Small and Tiny controls Panel
This command defines the size of the panel. The 2 dimensions are the width and height of the panel.
Panel = 193.675 53.975 Reverse
This command takes no arguments. If this command appears anywhere in the input file, the resulting PostScript will be flipped left to right (for printing on the reverse side of transfer media or transparency material). Text
This command is somewhat different from the others. After the equal sign, it takes 3 floating point numbers, a color, and a text string. The first 2 floating point numbers are the X, Y position of the text on the panel. The third number is the height of the text. The color represents the color of the text, and the text string represents the font to be used. No checking is done before preparing the PostScript; you are responsible for ensuring that the font is available on your printer.
This command is then followed by another line containing the text to be displayed.
Text = 100.0 10.0 5.0 0x7f4f00 Times-Roman-Bold
Filter Dial
This command introduces a new dial. The Dial command describes the X,Y center of the dial. The following commands then further refine the details of this particular dial. This relationship between the Dial command and it's successors is the only place where the order of the commands within the file matters.
Dial = 170.0 30.0 Radius
This command takes a single value which is the radius of the circle which forms the inside of the tick marks. This command refers to the current Dial command.
Radius = 7.0 Span
This command describes the angle over which the control may operate. Typically, this would be 270 for a potentiometer and 180 for a variable capacitor. This command refers to the current Dial command. NumTicks
This command describes the total number of tick marks, large and small, to be drawn. This is usually an odd number since the starting and ending values are counted. Typically this will be 11, 101, or a similar number. This command refers to the current Dial command.
NumTicks = 101 BigPer
This command tells the program how many small tick marks there are per large tick mark. This command refers to the current Dial command.
BigPer = 10 SizeTicks
This command describes the length of the small tick marks. This command refers to the current Dial command.
SizeTicks = 6.5 SizeBig
This command describes the length of the large tick marks. This command refers to the current Dial command.
SizeBig = 7.5 StartingIndicator
This command describes the value to be placed on the furthest counterclockwise large tick mark. This command refers to the current Dial command. IncrementPerBigTick
This command tells rcrpanel how much to increment the value in StartingIndicator for each succeeding large tick mark. This command refers to the current Dial command. SizeFont
This command describes how large to make the annotation on the ticks. This command refers to the current Dial command. ColorCircle
This command takes a single color as an argument, which is used to draw the inner circle. This command refers to the current Dial command. ColorTickMarks
This command permits setting the color to draw the small tick marks. This command refers to the current Dial command. ColorBigTickMarks
This command permits setting the color to draw the large tick marks. This command refers to the current Dial command. ColorText
This command accepts a single color which will be used for the annotation. This command refers to the current Dial command. StartAngle
By default, rcrpanel arranges dials so the dead spot on the control is straight down. This is the desired behavior in almost all cases. However, sometimes you may want to rotate a control to some other orientation. The single argument to StartAngle is the number of degrees clockwise to rotate the control. This command refers to the current Dial command.

8.6.3. Example Dials Frequency Markings for a VCO
Dial = 25.0 25.0
Radius = 7.0
SizeTicks = 4.5
ColorTickMarks = 0xff7777
SizeBig = 7.5
ColorBigTickMarks = 0x000000
StartingIndicator = 7.0
IncrementPerBigTick = 0.01
NumTicks = 51
BigPer = 5
ColorCircle = 0xff7777
SizeFont = 3.0
40 meter dial, 270 degrees
40 meter dial, 270 degrees
Figure 69. 40 meter dial, 270 degrees Markings for a volume control
ControlLarge = 25.0 25.0
Dial = 25.0 25.0
Radius = 7.0
SizeTicks = 1.0
ColorTickMarks = 0xaaddaa
SizeBig = 2.0
ColorBigTickMarks = 0x007f00
StartingIndicator = 0
IncrementPerBigTick = 2
NumTicks = 11
BigPer = 2
ColorCircle = 0xccffcc
SizeFont = 3.0
Volume Control
Volume Control
Figure 70. Volume Control Markings for a VFO (capacitor based)
ControlLarge = 25.0 25.0
Dial = 25.0 25.0
Radius = 7.0
SizeTicks = 3.5
ColorTickMarks = 0x777777
SizeBig = 5.5
ColorBigTickMarks = 0xffffff
StartingIndicator = 3.5
IncrementPerBigTick = 0.01
NumTicks = 41
BigPer = 4
ColorCircle = 0x777777
SizeFont = 2.0
ColorText = 0xffffff
Span = 180.0
Text = 25.0 15.0 2.0 0xff0000 Century-Schoolbook
80 meter VFO
80 meter VFO
Figure 71. 80 meter VFO

8.7. xgridloc

xgridloc is an application which will translate a latitude/longitude into a Maidenhead grid square. It will also calculate the Great Circle distance and bearing between two locations.

8.7.1. Installing xgridloc

xgridloc is installed like most applications in Fedora:
	sudo yum install xgridloc

8.7.2. Setting up xgridloc

xgridloc uses a small configuration file, ~/.xgridlocrc. Before using xgridloc you should replace the default location in the file with your station location using your favorite text editor:
	######### Runtime config file for 'xgridloc' #########
	### Blank lines and those starting with a # are ignored ###
	# The 'Home' location's position.
	# (East Longitude and North Latitude)
	# Format is "East/ddd:mm:ss North/dd:mm:ss"
	West/084:11:59 North/43:38:06
	# The name of the 'Home' location

8.7.3. Using xgridloc

xgridloc may be started by selecting item xgridloc icon (usually found in the Internet group) or by issuing the xgridloc command from the command line.
Clicking the Default Home Position button will cause the top location to be filled in with the location you specified in the configuration file.
If you enter a latitude and longitude in either the "Home" or "Remote" location and press Enter, the corresponding Locator box will be filled in with the Maidenhead grid square for that location.
Maidenhead grid square
Figure 72. xgridloc

If both locations are filled, the Great Circle bearing and distance will appear at the bottom of the window.

8.8. xwota

xwota allows for monitoring and querying the WOTA database. It operates much like a DX Cluster client, except it uses the database rather than a cluster. Refer to for information about the WOTA database.
Selecting Connect from the Xwota menu will connect to the database. New reports will appear on the screen as they arrive.
Who is on the air
Who is on the air
Figure 73. Who is on the air

The user may also query the database by selecting Query from the Show menu. A dialog will appear allowing the user to enter specific location, frequency, and/or call to be searched for. Clicking Send will then cause the results to be returned at the bottom of the main window.
Xwota query window
Xwota query window
Figure 74. Xwota query window

The user may also enter his own report. Before doing this, station information should be entered by selecting Station Info from the Settings menu and filling in the dialog:
Station Info window
Station Info window
Figure 75. Station Info window

The user may then enter the frequency and optionally a comment in the main window, and click the Update button to cause the report to be sent to the database.

A. Installing Software on Fedora

There are basically two ways to install software from the Fedora repositories; from the GUI using PackageKit and from the command line using yum. Because the yum approach is simpler, throughout this document we describe that method. However, there are a number of details with respect to yum that are useful to know, and some users feel more comfortable with a graphical user interface. Hence, this appendix.

A.1. Installing Software with the GUI

Launch the PackageKit application by selecting the Add/Remove Software icon from the System Tools group.
Add/Remove Software
Launching PackageKit
Figure A.1. Add/Remove Software

There may be a delay before the controls on the window that appears may be used. This delay may be brief or lengthy, depending on what you have done earlier. The data used by PackageKit is cached, and if it is stale, new data will be downloaded, which may take several minutes.
Type in the name of the package you wish to install in the text box at the upper left, and select the Find button. There may be a delay, and you may need to click the Find button a second time.
The package (perhaps with several others) will appear to the right. The closed box indicates that the package is not installed on your system.
Searching for Software
Searching for Software
Figure A.2. Searching for Software

Click on the check box next to the package you wish to install. A blue plus sign will appear over the box indicating that is has been selected to install.
Selecting a package to install
Selecting a package to install
Figure A.3. Selecting a package to install

You may repeat the process if you wish to install additional packages. When you have selected the packages you wish, click the Apply button at the lower right to install the packages.
Depending on how your system has been configured, you may be prompted to enter the password for the administrative user. If the package is unsigned, or is from a repository you have not used before, you may be prompted for this password again. As a general rule, only administrators may install software.
Authorizing the installation
Authorizing the Installation
Figure A.4. Authorizing the installation

Enter the root password and click Authenticate.
The package will then be installed. When the installation is complete, the package will be shown as an open box, indicating that the package is installed. For some applications, the application's icon may be displayed instead of the open box. The Apply button will be disabled, indicating that there are no pending actions to apply.
Package is installed
Package is installed
Figure A.5. Package is installed

The Find button searches not only the name of the package, but also the package description. Some common words may reveal several packages, some perhaps not those intended. For example, if you typed in "circuit" with the intent of finding circuit design applications, you may also find applications referring to wired communications circuits as well as racing circuits!
Searching the description
Searching the description
Figure A.6. Searching the description

Sometimes you may want to try several variations of a word or phrase. If, for example, you are looking for an SSTV application, trying "slowscan" or "slow scan" will fail:
Searching the description - failure
Searching the description
Figure A.7. Searching the description - failure

The developer of the slow scan application used the word "slow-scan" in his description. PackageKit is not smart enough to guess what you meant or what the original developer was thinking.
Searching the description - success
Searching the description
Figure A.8. Searching the description - success

A.2. Installing Software with yum

Unlike PackageKit, where the system administrator may choose to allow non-administrative users to install software, yum requires administrator authentication. There are three ways this can be done:
  • You may switch to the root user with the su command:
    [jjmcd@Cimbaoth ~]$ su -
    [root@Cimbaoth ~]# yum install xastir
    Loaded plugins: presto, refresh-packagekit
    This is the least desirable method. You must enter the root password, and you can easily forget that you are operating as root. As the root user you can do unlimited damage.
  • You may use the su command with the -c switch. This allows you to enter the single yum command as root, but immediately switches back to your normal user:
    [jjmcd@Cimbaoth ~]$ su - 'yum install fldigi'
    Loaded plugins: presto, refresh-packagekit
    Notice that you must surround the command with quotation marks or apostrophes. This still requires you to type the password, and is somewhat more annoying to type, but does not leave you as root ready to do damage.
  • If the administrator has set you up in the sudoers file, you may use the sudo command:
    [jjmcd@Cimbaoth ~]$ sudo yum install wxapt
    Loaded plugins: presto, refresh-packagekit
    This has several advantages; you don't need to type the password, you are not left in a dangerous position, and if desired, the administrator can limit you to a select set of commands so you do not inadvertently cause damage.
    Because this is the preferred approach, the examples in this guide use this method. However, it does require setup ahead of time.
yum may determine that additional packages must be installed. yum will list these packages and calculate the total size of the download. It will then ask you whether you want to actually download and install this package or group of packages:
[jjmcd@Cimbaoth ~]$ sudo yum install trustedqsl
Loaded plugins: presto, refresh-packagekit
Setting up and reading Presto delta metadata
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package trustedqsl.i386 0:1.11-3.fc10 set to be updated
--> Processing Dependency: tqsllib >= 1.2 for package: trustedqsl-1.11-3.fc10.i386
--> Processing Dependency: for package: trustedqsl-1.11-3.fc10.i386
--> Running transaction check
---> Package tqsllib.i386 0:2.0-5.fc10 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

 Package             Arch          Version               Repository        Size
 trustedqsl          i386          1.11-3.fc10           updates          557 k
Installing for dependencies:
 tqsllib             i386          2.0-5.fc10            updates          167 k

Transaction Summary
Install      2 Package(s)         
Update       0 Package(s)         
Remove       0 Package(s)         

Total download size: 723 k
Is this ok [y/N]: 
Answer y or N depending on whether you want to download and install the group of packages.

A.2.1. Searching for Software

yum gives you a number of choices for locating software you desire. To find information about a package you do not need to provide credentials. Any user may look up information about a package. You may search for specific words in the description using yum search:
[jjmcd@Cimbaoth ~]$ yum search APRS
Loaded plugins: presto, refresh-packagekit
Setting up and reading Presto delta metadata
================================ Matched: APRS =================================
aprsd.i386 : Internet gateway and client access to amateur radio APRS packet
           : data
xastir.i386 : Amateur Station Tracking and Reporting system for amateur radio
[jjmcd@Cimbaoth ~]$ 
yum will return the names of any package with the specified phrase in its description, and a short description. You may get a more detailed description of the package with the yum info command:
[jjmcd@Cimbaoth ~]$ yum info xastir
Loaded plugins: presto, refresh-packagekit
Setting up and reading Presto delta metadata
Installed Packages
Name       : xastir
Arch       : i386
Version    : 1.9.4
Release    : 5.fc10
Size       : 4.0 M
Repo       : installed
Summary    : Amateur Station Tracking and Reporting system for amateur radio
URL        :
License    : GPLv2+
Description: Xastir is a graphical application that interfaces HAM radio
           : and internet access to realtime mapping software.
           : Install XASTIR if you are interested in APRS(tm) and HAM radio
           : software.

[jjmcd@Cimbaoth ~]$ 
Notice that yum also tells you whether the package is installed. Yum also gives you the address of the upstream website so you may learn more about the package before installing it.

B. Revision History

Revision History
Revision 16.1January 3, 2012John McDonough
Added fldigi back in now that it is working
Revision 16.0December 10, 2011John McDonough
Changes for Fedora 16:
- New screenshots for F16
- Remove fldigi (not working on 16 yet)
- Updates to installation procedures
- Remove references to old GNOME menu
- Add documentation for xnec2c
- Add documentation fr gspiceui
- Add documentation for gpredict
- Correct error in xgridloc documentation
- Add documentation for gerbv
- Add documentation for pcb
- Other mostly minor touch-ups
Revision 15.90November 23, 2011John McDonough
Remove xdx, obsoleted in Fedora 16
Documentation for Chirp
Revision 0.9November 9, 2010John McDonough
Documentation for dxcc
Documentation for gresistor
Documentation for callgit
Correct typo in colrdx
Correct typos in xwota
Revision 0.8November 7, 2010John McDonough
Documentation for rcrpanel
Documentation for colrdx
Documentation for xconvers
Documentation for xdx
Documentation for xastir
Documentation for gEDA
Documentation for gerbv
Documentation for pcb
Documentation for xwota
Revision 0.7November 20, 2009John McDonough
Installing Software appendix
Revision 0.7October 31, 2009Eric Christensen
Added xlog installation and setup procedures.
Revision 0.6October 29, 2009John McDonough
Revision 0.5October 29, 2009Randy Berry
Revision 0.4October 28, 2009Eric Christensen
xlog screenshot
Additional info on fldigi
Revision 0.3October 6, 2009John McDonough
Revision 0.2October 4, 2009John McDonough
Beginning of SPLAT! instructions
Revision 0.1October 1, 2009John McDonough
Document skeleton