NAME

       rigswr - measure VSWR vs frequency using Hamlib.

SYNOPSIS

       rigswr [OPTION]... start_freq stop_freq [freq_step]

DESCRIPTION

       rigswr uses Hamlib to control a rig to measure VSWR vs frequency:
       It  scans  frequencies  from  start_freq  to  stop_freq with a step of freq_step. 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 rig that can measure VSWR  and  a  Hamlib  backend  that
       supports reading VSWR from the rig.

       Keep  in  mind  that Hamlib is BETA level software.  While a lot of backend libraries lack
       complete rig support, the basic functions are usually well supported.  The API may  change
       without publicized notice, while an advancement of the minor version (e.g. 1.1.x to 1.2.x)
       indicates such a change.

       Please report bugs and provide feedback at the e-mail address given in the REPORTING  BUGS
       section.  Patches and code enhancements are also welcome.

OPTIONS

       This  program  follows  the usual GNU command line syntax, with long options starting with
       two dashes (`-').

       Here is a summary of the supported options:

       -m, --model=id
              Select radio model number. See model list (use 'rigctl -l').

       -r, --rig-file=device
              Use device as the file name of the port the radio is  connected.   Often  a  serial
              port,  but  could  be  a  USB to serial adapter.  Typically /dev/ttyS0, /dev/ttyS1,
              /dev/ttyUSB0, etc.

       -s, --serial-speed=baud
              Set serial speed  to  baud  rate.  Uses  maximum  serial  speed  from  rig  backend
              capabilities as the default.

       -c, --civaddr=id
              Use id as the CI-V address to communicate with the rig. Only useful for Icom rigs.
              NB:  the  id  is  in  decimal  notation, unless prefixed by 0x, in which case it is
              hexadecimal.

       -p, --ptt-file=device
              Use device as the file name of the Push-To-Talk  device  using  a  device  file  as
              described above.
              This is only needed if the radio doesn't have legacy PTT control.

       -p, --ptt-type=type
              Use  type  of  Push-To-Talk  device.   Supported types are RIG, DTR, RTS, PARALLEL,
              NONE.
              This is only needed if the radio doesn't have legacy PTT control.

       -C, --set-conf=parm=val[,parm=val]*
              Set config parameter.  e.g. stop_bits=2
              Use -L option of rigctl for a list.

       -v, --verbose
              Set verbose mode, cumulative (see DIAGNOSTICS below).

       -h, --help
              Show summary of these options and exit.

       -V, --version
              Show version of rigswr and exit.

       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.

EXAMPLE

       rigswr -m 209 -r /dev/ttyS1 14000000 14290000 50000 > cswr

       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.

       After completion, cswr file contains the following lines:
         14000000 1.50
         14050000 1.31
         14100000 1.22
         14150000 1.07
         14200000 1.07

       Result could then be plotted with gnuplot:
              gnuplot
              set data style linespoints
              set grid
              plot "cswr"

DIAGNOSTICS

       The -v, --version 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.

EXIT STATUS

       rigswr exits with:
       0 if all operations completed normally;
       1 if there was an invalid command line option or argument;
       2 if an error was returned by Hamlib;
       3 if the rig doesn't have the required capabilities.

BUGS

       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.

REPORTING BUGS

       Report bugs to <hamlib-developer@lists.sourceforge.net>.
       We are already aware of the bug in the previous section :-)

AUTHORS

       Written by Thierry Leconte, Stephane Fillod, and the Hamlib Group
       <http://www.hamlib.org>.

COPYRIGHT

       Copyright © 2004-2009 Thierry Leconte, Stephane Fillod, and the Hamlib Group.
       This is free software; see the source for copying conditions.  There is NO  warranty;  not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       rigctl(1), gnuplot(1), hamlib(3)