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202 Chapter 1
GPIB Command Dictionary
DECoder subsystem
:NAMPs|NTACs:CHANnel <string>
:NAMPs|NTACs:CHANnel?
These commands set/query the type of data to decode.
• ‘Cntl’ selects reverse control channel (RECC) data.
• ‘Voice’ selects reverse voice channel (RVC) data.
Syntax
DEC:NAMP:CHAN ‘Cntl’
‘Voice’
DEC:NAMP:CHAN?
Screen/field equivalent
DEC:NAMP:CHAN controls the Channel field on the SIGNALING
DECODER screen when the Mode field is set to AMPS-TACS or
NAMP-NTAC.
:NAMPs|NTACs:GATE <real number>
:NAMPs|NTACs:GATE?
This command specifies how long the decoder analyzes a signal after it
has been triggered. Up to 6.55 seconds of gate time can be specified. The
minimum gate time must be long enough to allow the preamble and all
necessary data bits to be captured.
If the gate time is too long, the decoder’s buffer becomes full. A message
is displayed instructing you to decrease the gate time.
This function is not used with the NAMPS-NTACS RVC decoder.
This command utilizes the “Real Number Setting Syntax” on page 299,
but does not use the :STATe command.
Syntax
DEC:NAMP:GATE <real number>
DEC:NAMP:GATE?
Screen/field equivalent
DEC:NAMP:GATE controls the Gate Time field on the SIGNALING
DECODER screen when the Mode field is set to NAMP-NTAC.