RIGSWR(1) | Hamlib Utilities | RIGSWR(1) |
rigswr - measure VSWR vs frequency.
rigswr |
[-hvV] [-m id] [-r device] [-s baud] [-c id] [-C parm=val] [-p device] [-P type] start_freq stop_freq [freq_step] |
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rigswr uses Hamlib to control a radio to measure VSWR (Voltage Standing Wave Ratio) over a frequency range.
It scans frequencies from start_freq to stop_freq with an optional increment of freq_step (default step is 100 kHz). All values must be entered as an integer in Hertz (cycles per second).
Note: rigswr assumes that start_freq is less than or equal to stop_freq. If it is greater, rigswr will exit without doing anything.
For each frequency, it transmits at 25% of total POWER during 0.5 second in CW mode and reads VSWR.
Frequency and the corresponding VSWR are then printed on stdout.
To work correctly, rigswr needs a radio that can measure VSWR and a Hamlib backend that supports reading VSWR from the radio.
Keep in mind that Hamlib is BETA level software. While a lot of backend libraries lack complete radio support, the basic functions are usually well supported.
Please report bugs and provide feedback at the e-mail address given in the BUGS section below. Patches and code enhancements sent to the same address are welcome.
This program follows the usual GNU command line syntax. Short options that take an argument may have the value follow immediately or be separated by a space. Long options starting with two dashes (‘-’) require an ‘=’ between the option and any argument.
Here is a summary of the supported options:
Note: Some options may not be implemented by a given backend and will return an error. This is most likely to occur with the --set-conf option.
The -v, --verbose option allows different levels of diagnostics to be output to stderr and correspond to -v for BUG, -vv for ERR, -vvv for WARN, -vvvv for VERBOSE, or -vvvvv for TRACE.
A given verbose level is useful for providing needed debugging information to the email address below. For example, TRACE output shows all of the values sent to and received from the radio which is very useful for radio backend library development and may be requested by the developers.
rigswr exits with:
Scans frequencies between 14.000 MHz and 14.200 MHz with 50 kHz step on a TS-850 and records VSWR measurements in file cswr.
rigswr -m 209 -r /dev/ttyS1 14000000 14200000 50000 > cswr
After completion, cswr file contains the following lines:
14000000 1.50
14050000 1.31
14100000 1.22
14150000 1.07
14200000 1.07
The result can be plotted with gnuplot(1):
gnuplot
set data style linespoints
set grid
plot cswr
Depending on keyer/QSK setup, transmissions in CW mode may not be modulated thus possibly giving a wrong result. Please report this situation if it happens.
Report bugs to:
This file is part of Hamlib, a project to develop a library that simplifies radio and rotator control functions for developers of software primarily of interest to radio amateurs and those interested in radio communications.
Copyright © 2004 Thierry Leconte
Copyright © 2004-2011 Stephane Fillod
Copyright © 2007,2018 Nate Bargmann
This is free software; see the file COPYING for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Links to the Hamlib Wiki, Git repository, release archives, and daily snapshot archives:
2018-04-29 | Hamlib |