Appendix C– DTR Remote M&C Protocol CG-6073 (Rev R, June, 2012)
65
7.0 TRL EMULATION MODE
The TRL EMULATION MODE allows legacy equipment to communicate with the
DTR as if it were a GDST TRL tracking receiver. It is obsolete and should not be
used for new applications.
TRL prompts are 'c>', where c is the status of last command, as follows:
- No error; processed OK.
? Unrecognized command.
R Not in remote control; can't execute command.
V Value out of range or not allowed with current configuration.
M Missing fields/parameters.
X Extra characters at end of command (not including whitespace.)
TRL commands supported are as follows:
? Get help on TRL commands.
Usage: ?c
c is the character of the command to get help on.
A Set attenuation. See / CONFIGS OPERATION ANALOG-OUTPUTS
ATTENUATION
Usage: Annn
n TRL range was 0 to 500 tenths of a dB, with implied dB decimal point to
the left of the least significant digit. Since the dynamic range of the DTR is
much larger than the TRL range, this parameter controls the minimum
reference level of the DTR input, which in conjunction with the slope and
DAC output voltage range are used to generate the corresponding tracking
signal level.
C# See DTR keyword C#
F Set tuning frequency in kHz. See / FREQUENCY
Usage: Fnnnnnn[n...]
n Range is 945000 to 12750000
I Set RF input source. See / POL-SELECT
Usage: In
n is 1 or 2, representing the state of an RF path selection switch typically
used to select Polarization (Vertical or Horizontal, Left-hand or Right-hand
for circular feed systems).
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