270
N:\mkt\MANUALS\HP8924C\APPMOD\BOOK\chapters\amcproc.fb
Chapter 9, 264 Using the Analog Call Processing Subsystem
Using Manual (Front-Panel) Control
Mobile Station Audio Out Impedance
If the mobile station’s speaker is disconnected when using the manufacturer’s
special fixture, the user must ensure that the proper load impedance is applied to
the audio output of the mobile station. The special fixtures supplied by the
manufacturer of the mobile station may or may not terminate the audio output in
its proper load impedance. Refer to the manufacturer’s documentation for
information on the termination supplied by the special fixture.
If a load impedance must be supplied then it can be placed across the AUDIO IN
connector.
600 Ohm Impedance
Some industry standards require the audio out of the mobile station to be
terminated in 600 ohms for testing purposes. The AUDIO IN connector of the
Test Set can be terminated in 600 ohms internally.
Generalized Test Procedure
This section presents a generalized which can be followed to successfully use the
Analog Call Processing Subsystem. This procedure does not exercise all the
functionality of the Analog Call Processing Subsystem. The procedure exercises
the mobile station as follows:
•
registers the mobile station
•
pages the mobile station
•
brings the mobile station up on a voice channel
•
hands the mobile station off to a new voice channel
•
makes a 12 dB SINAD measurement on the mobile station while on a voice channel (if
the mobile station’s audio in/out connections are available)
•
releases the mobile station