F5OEO-rpidatv/scripts/commands.txt

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#
# This is a list of commands that can be sent to the server to adjust parameters
# They are sent by writing to a temporary file calle /tmp/expctrl
#
# This is an example of doing it from a command line
#
# echo "set level 50" >> /tmp/expctrl
#
#
# to start the server for narrowband operation
# ./express_server -nb
# To read the transport stream from stdin
#./express_server -nb -i stdin
#
# If you have a Si570 fitted you need to add -si570 to the command line to enable it
#
# Set the transmit frequency n in Hz echo "set freq 437000000" >> /tmp/expctrl
set freq n
# Set the symbol rate n in symbols per second
set srate n
# Set the FEC rate
set fec {1/2,2/3,3/4,5/6,7/8}
# Set the level n from 0 to 100
set level {0...100}
# Set the UDP transport stream socket n, this command only works from the configuration file
# datvexpress.txt
set tsock n
# Go to transmit
set ptt tx
# Go to receive
set ptt rx
# Set the iq dc offset mode on
set iqcal on
# Set the iq dc offset mode off
set iqcal off
# Set the ical value n (normally between -20 to + 20)
set ical n
# Set the qcal value n (normally between -20 and +20)
set qcal n
# Send a plain carrier
set car on
# Don't send a carrier
set car off
# Transmit a ramp (the ram rate is set by the symbol rate)
set ramp on
# Don't transmit a ramp
set ramp off
# Enable pre-distortion (this won't work is no table values have been loaded)
set pre on
# Do not use pre-distotion table
set pre off
# Set an entry in the pre-distortion look table. There are 256 entries int the table
# the first n is the entry number and the second n is the value for that entry and can be
# between 0 and and the value is from 0 to 32767
set ptab n n
# This command kills the server process
set kill