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40 01-0870-401B 01/03
Using a Remote Unit
DMD.
x
Where
x
is A, B, C, or D
and designates the
demodulator to be
configured or queried.
— Combined with additional mnemonics, specifies the
demodulator that is the object of the command.
For example, if RF output B is currently active, the DMD.B
DMLOCK command displays the current lock status of
demodulator B.
By itself, queries all parameters of specified
demodulator.When DMD
.
x
is entered, the TDR6 returns the
following information for the designated channel: Eb/No,
locked status for the decoder and demodulator, offset,
modulation type, LO frequency, RF frequency, data rate,
symbol rate, code rate, LNB power, and rolloff setting.
Commands for all demodulator ports are the same.
Front panel equivalent: None
DMD
.
x
BER — — Query-only; displays the bit error rate; this value represents
the number of errors detected in the signal after error
correction is applied. This rate should be a zero for correct
performance.
DMD
.
x
CR 1/2, 2/3, 3/4, 5/6, 7/8, 8/9 5/6 Sets the Viterbi code rate for the designated demodulator.
Front panel equivalent:
Details>Input>Config>Demod>RF>Code Rate
DMD
.
x
DCLOCK locked, unlocked — Query-only; displays the locked status of the
decoder
to the
incoming signal.
Front panel equivalent: Details>Input Status>Decoder
DMD
.
x
DMLOCK locked, unlocked — Query-only; displays the locked status of the
demodulator
to the incoming signal.
Front panel equivalent: Details>Input>Status>Demod
DMD
.
x
DR 1000000 to 100000000
bps
8448000 Sets the value for the incoming demodulated data rate for
the designated demodulator.
Front panel equivalent:
Details>Input>Config>Demod>RF>Data Rate
DMD
.
x
EBNO -99 to 99 dB — Query-only; displays the energy per bit over the noise ratio
of the signal after Viterbi decoding and before Reed-
Solomon decoding for the designated demodulator.
Front panel equivalent: Details>Input>Status>Eb/No
DMD
.
x
LNB OFF, 13V, 18V Off Sets the output DC voltage to power the antenna’s low
noise block amp and defines polarization for the designated
demodulator.
Front panel equivalent:
Details>Input>Config>Demod>RF>LNB Power
DMD
.
x
LO 0 to 15000 MHz 10000 Sets an internal representation of the local oscillator
frequency of the external down converter for the designated
demodulator.
Front panel equivalent:
Details>Input>Config>Demod>RF>LO Frequency
DMD
.
x
MOD QPSK, 8PSK, 16QAM QPSK Sets the modulation type for the decoder.
Front panel equivalent:
Details>Input>Config>Demod>RF>Modulation
DMD
.
x
OFFSET — — Query-only; displays the difference between the frequency
set by the user and the frequency actually locked onto.
Front panel equivalent: None
DMD
.
x
RAWBER — — Query-only; displays the raw bit error rate; this rate is the
error rate of the signal as it is received from the satellite,
before error correction is applied.
TDR6 Remote Command Listing (continued)
Mnemonics
Parameters/
Response Values
DVB Defaults Description