Operating instructions

OPERATING MANUAL 2945A
46882-311D 1-5
Systems testing
Cellular and trunked radio-telephone systems
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C3253
SERVICE
CONNECTION
Service Monitor
RF
AF IN
+
AF OUT
DC
SUPPLY
Fig. 1-5 Cellular radio-telephone test setup
With the appropriate cellular or trunked mobile telephone option included, the monitor has built-in
software to generate and interrogate signals of the various cellular or trunked telephone systems.
This gives the facility for testing all aspects of these systems.
Inbuilt test programs and user programming facilities give speed and flexibility to these tests.
Operating instructions for each of the SYSTEM test options is given in separate supplements to
this manual. These supplements are supplied, as appropriate, with instruments fitted with
SYSTEM testing options.
Spectrum analyzer
The SPEC ANA mode allows ‘off air’ and directly coupled RF signals to be studied and
monitored.
Sideband spread, harmonic levels and RF interference can be examined.
The frequency range of the spectrum analyzer is from 100 kHz to 1.0 GHz with the start and stop
frequencies of the sweep infinitely variable from within this range.
The tracking generator permits frequency response tests to be made to frequency dependent circuits
and the frequency offset facility extends this capability into the area of frequency shifting circuits,
such as mixers.
The ‘Look and Listen’ function gives the ability to demodulate a signal displayed on the spectrum
analyzer and monitor the signal obtained on the built-in loudspeaker, on headphones or other data
output equipment.