HP 8920A - Afgen2 Freq

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S:\HP892XX\USRGUIDE\manual\encoscrn.fb
Chapter 10, Signaling Encoder (AF Generator 2)
Function Generator Encoder
AFGen2 Freq
This field sets the tone frequency for the Function Generator.
AFGen2 To
This audio frequency generator control contains two fields:
• The upper field determines whether the Function Generator’s signal modulates the RF
Generator, or is output through the AUDIO OUT connector.
• The lower field sets the amplitude (including Off).
Operating Considerations
When the Waveform field is set to Sine and the signal is output to the AUDIO
OUT connector, the amplitude can be set in units of rms or peak voltage. This is
done in the
Sine Units field that appears when Audio Out is selected. In all
other cases, the amplitude is always set in peak voltage.
Audio Out
Audio output coupling selects ac or dc coupling of the Function Generator to the
AUDIO OUT connector when the upper
AFGen2 To field is set to Audio Out.
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.
Sine Units
This field specifies whether the signal’s output is in units of rms or peak. This
field is only present when the
AFGen2 To field is set to Audio Out.