WSJT-X/manpages/man1/fst4sim.1.txt

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:doctype: manpage
:man source: AsciiDoc
:man version: {VERSION}
:man manual: WSJT-X Manual
= fst4sim(1)
== NAME
fst4sim, qra64sim - Generate simulated QRA64, FST4, and FST4W mode signals.
== SYNOPSIS
*qra64sim* msg A-E Nsigs fDop DT Nfiles SNR
*fst4sim* msg TRsec f0 DT h fDop del Nfiles SNR W
== DESCRIPTION
*fst4sim* can be used to generate FST4 and FST4W signals with
user-specified message content, mode parameters, and SNR values.
== ARGS
*msg*::
A valid QRA64, FST4, or FST4W message enclosed in quotation marks.
*A-E*::
QRA64 sub-mode designator.
*Nsigs*::
Number of signals to simulate, distributed even across a 2000 Hz
bandwidth.
*TRsec*::
A valid T/R period duration (s).
*f0*::
Integer signal frequency offset (Hz).
*DT*::
Decimal signal time offset (s).
*h*::
A valid modulation index.
*fDop*::
Decimal Doppler frequency spread (Hz).
*del*::
Decimal Watterson model delay (ms).
*nfiles*::
Number of files to generate.
*snr*::
Add Guassian noise to simulate SNR in 2500 Hz bandwidth.
*W*::
Hint to break ties between ambiguous messages '0' as 77-bit (FST4),
'1' as 50-bit (FST4W).
Generated files are 12000 Hz sample rate, 16-bit unsigned format, mono
PCM .WAV files suitable for replay using WSJT-X either vie the GUI
*wsjtx*(1) or using the command line slow mode decoder *jt9*(1). Files
are named 000000_nnnnnn.wav (000000_nnnn.wav for QRA64), where
'nnnnnn' or 'nnnn' increments from zero.
== AUTHOR
Joe Taylor, K1JT.
== COPYING
*fcal* is Copyright (C) 2001 - 2019 by Joseph H. Taylor, Jr., K1JT,
with contributions from additional authors. WSJT-X is Open Source
software, licensed under the GNU General Public License (GPLv3).
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.