HP 8920A - Page 462

462
Chapter 8, Programming The Call Processing Subsystem
Programming The CALL CONTROL Screen
[] Active
When lit, the Active annunciator indicates that the control channel of the Test
Set is turned on.
If this annunciator is lit, the Base Station is transmitting system parameter
overhead messages on the assigned control channel. If the annunciator is not lit
the base station is not active (note that the Test Set may still be outputting a
modulated RF carrier but the Test Set’s firmware is not active and no
communication can occur between a mobile station and the Test Set).
The
Active annunciator is not programmable.
The state of the
Active annunciator is reflected in the Call Processing Status
Register Group Condition Register bit 0. See “Status Reporting” in the User’s
Guide for further information.
AF Freq
The AF Freq field is displayed only when the Display field is set to Meas.
This field displays the audio frequency of the demodulated FM signal being
transmitted by the mobile station. Four dashes (----) indicate that no audio
frequency is present to measure. A numeric value would only be displayed when
the Test Set’s
Connected annunciator is lit.
Refer to the
Display field description, on page 467, for information on how to
read measurement results from this field.