Agilent Technologies A.18.00 User Manual

S:\agilent\8920\8920b\PRGGUIDE\BOOK\CHAPTERS\callproc.fb

Chapter 8, Programming the Call Processing Subsystem

There are a wide variety of audio measurements which can be made from the 
ANALOG MEAS screen.

The following examples illustrate how to make a typical mobile station receiver 
measurement (RF Sensitivity) and a typical mobile station transmitter 
measurement (FM Hum and Noise). 

Refer to the HP 8920A RF Communications Test Set Applications Handbook, 
section “Testing FM Radios” for further information on using the Test Set’s Audio 
Analyzer to make audio measurements. 

The following example code segment shows how to program the 

 

screen to make an RF Sensitivity measurement. The code segment represents a 
HP

®

 BASIC subprogram.

In order for this subprogram to work properly the following conditions must be 
true when the subroutine is called:

•

Call Processing Subsystem is in the 

 state (that is, the 

 annunciator 

is lit)

•

the mobile station’s speaker output is connected to the Test Set’s AUDIO IN connector

•

the mobile station’s microphone input must be connected to the Test Set’s AUDIO OUT 
connector

The intended purpose of this example subprogram is to illustrate how to program 
the 

 screen. There are a variety of ways to make an RF Sensitivity 

measurement. The method used in this example is based upon the EIA/IS-19-B 
Standard (May 1988). The method and standard chosen for any particular 
application will depend upon the mobile station being tested.