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Chapter 1 73
GPIB Command Dictionary
AFG2|ENCoder subsystem
:POLarity <string>
:POLarity?
This command causes the digitally modulated signals to be sent with a
normal or inverted response to the digital data. When Inverted, a
digital 1 produces a frequency shift in an FM carrier opposite to normal
operation.
Syntax
AFG2:POL ‘Norm’
‘Invert’
AFG2:POL?
Screen/field equivalent
AFG2:POL controls the Polarity field on the SIGNALING ENCODER
screen when the Mode field is set to AMPS-TACS or NAMP-NTAC.
:SEND:MODE <string>
:SEND:MODE?
These commands set/query the mode used when a message is sent.
• ‘Single’ outputs the entire message once.
• ‘Burst’ outputs the message the number of times specified by the
AFG2:BURS command.
• ‘Cont’ outputs the message continuously until the AFG2:STOP
command is sent.
• ‘Step’ outputs a single step in an encoder sequence each time the
AFG2:SEND command is sent. After the entire sequence is output,
the encoder returns to the first character in the sequence.
Syntax
AFG2:SEND:MODE ‘Single’
‘Burst’
‘Cont’
‘Step’
AFG2:SEND:MODE?
Screen/field equivalent
AFG2:SEND:MODE controls then Send Mode field on the SIGNALING
ENCODER screen when the Mode field is set to AMPS-TACS, NAMP-NTAC,
or DTMF.