HP 8920A User Manual page 486

Chapter 18, RF Generator Screen
Field Descriptions
AFGen1 Freq
AFGen2 Freq
AFGen1 To
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This Audio Frequency Generator control sets the frequency for the first audio
frequency sinewave generator.
This Audio Frequency Generator control sets the frequency for the second audio
frequency sinewave generator. It can also be used to set the Function Generator's
frequency when the signaling encoder is used.
This field is also used to control the send/stop functions for some encoder modes.
For example, when sending a tone sequence, this field is used to send and stop the
sequence. The field's name changes to
used.
This field is removed from this screen when NMT encoding or decoding is used.
(NMT programs can only be run from the NMT Decoder screen.)
See Also
Chapter 10, "Signaling Encoder (AF Generator 2)"
This Audio Frequency Generator control is used to set two values:
• The upper field determines whether the AF signal modulates the RF Generator, or is
output through the AUDIO OUT connector.
• The lower field sets the amplitude (including Off). The level at the AUDIO OUT
connector is always in volts rms across a low-impedance output.
Operating Considerations
This is a priority control field. Accessing the RX TEST or TX TEST screen
overrides any changes made to this field in other screens.
See Also
"Interaction Between Screens" on page 54
when this type of operation is
AFGen2