HP 8920B, Programmer'S Manual

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Chapter 8, Programming The Call Processing Subsystem
Programming The ANALOG MEAS Screen
Example Measurement Routines
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.
Example RF Sensitivity Measurement
The following example code segment shows how to program the
ANALOG MEAS
screen to make an RF Sensitivity measurement. The code segment represents a
HP RM 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
Connect
state (that is, the
Connect
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
ANALOG MEAS
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.