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Chapter 4, Adjacent Channel Power Screen
Field Descriptions
AFGen1 Freq
This field sets the frequency for the first audio frequency sinewave generator.
AFGen1 To
This field sets two values:
• The upper field determines whether the AFGen1 signal modulates the RF Generator or
is output through the AUDIO OUT connector.
• The lower field sets the depth of modulation for FM and AM in kilohertz and amplitude
(including Off) for audio out. The AUDIO OUT level is always in volts rms.
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
Carrier Ref
Use the carrier reference field to indicate whether the carrier (Tune Freq) being
measured should be unmodulated or modulated when making the ACP reference
measurement. (For more information, refer to "How the Test Set Measures
Adjacent Channel Power (ACP)" on page 86
.)
Operating Considerations
• FM transmitters can be measured with the carrier modulated or unmodulated.
• For AM transmitters, the carrier must be measured while unmodulated. AFGen1 and
the AUDIO OUT port must be used as the modulation source whenever Unmod is
selected.
Channel BW
Use the channel bandwidth field to specify the bandwidth of the carrier and
adjacent channels to be measured. (See
figure 11 .)
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