HP 8920A - Page 245

245
Chapter 6, Call Processing Subsystem
ANALOG MEAS Screen
AF Freq
This field is a one-of-many field used to select the type of measurement to be
made by the Audio Frequency Analyzer on the audio signal being measured.
Refer to the
SINAD field description, on page 110 for descriptions of the
measurements available.
AFGen1 Freq
This field sets the output frequency of Audio Frequency Generator 1. Refer to the
AFGen1 Freq field description, on page 486 for further information.
AFGen1 To
This field has two fields:
• the upper field sets the destination port for Audio Frequency Generator 1
• FM -RF Generator FM modulator
• AM -RF Generator AM modulator
• Audio Out -AUDIO OUT connector on front panel of Test Set
• the lower field sets the:
• FM modulation deviation if the upper field set to FM
• AM modulation depth if the upper field set to AM
• amplitude of audio signal (volts RMS) at the AUDIO OUT connector if upper field
is set to Audio Out
For testing mobile stations, the upper field is normally set to FM, and the lower
field set to the desired FM deviation in kHz. Refer to the
AFGen1 Freq field
description, on page 486
for further information.
Amplitude
This field sets the output power of the Test Sets’s transmitter (that is, the output
power of the Test Set’s RF Generator). Refer to the
Amplitude field description,
on page 487
for further information.
De-Emphasis
This field is used to select or bypass the 750 µs de-emphasis filter network used to
condition the audio signal before being analyzed by the Audio Frequency
Analyzer. Refer to the
De-Emphasis field description, on page 104 for further
information.