379
Chapter 10, Signaling Encoder (AF Generator 2)
DTMF Sequence Encoder
AFGen2 To
This audio frequency generator control contains two fields:
• The upper field determines whether the DTMF sequence modulates the RF Generator,
or is output through the front-panel AUDIO OUT connector.
• The lower field sets the amplitude (including Off).
The output level is the peak value for each tone pair, regardless of the Twist and
Pre-Emp settings.
See Also
Twist
field description, on page 381
Audio Out
Audio output coupling selects ac or dc coupling of the DTMF Sequence Generator
to the AUDIO OUT connector when the upper
AFGen2 To field is set to Audio
Out
.
Bursts
This field defines the number of sequences output each time Send is selected.
This function only works when the
Send Mode field is set to Burst.
FM Coupling
This field alters the FM modulator to allow DCFM from internal and external
modulation sources. This field also selects ac or dc coupling between the RF
Generator’s frequency modulator and the rear-panel MODULATION INPUT
connector.
On Time
This field sets the length of time each DTMF tone is on during the sequence.
Off Time
This field sets the length of time each DTMF tones is off during the sequence.
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