Aeroflex 3901 - Chapter 7 Radio Test Instruments; Ch a Nn el a N Aly Z er

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7-1
Chapter 7
Radio Test Instruments
Introduction
This chapter explains the use of the 3900 Spectrum Analyzer, Channel Analyzer, Audio Analyzer and
Oscilloscope Instruments. This chapter is intended for users familiar with the general principles and use
of these instruments.
The Audio Analyzer is an optional feature (390XOPT055) and is only available when option
390XOPT055 has been installed in the Test Set.
Channel Analyzer
The Channel Analyzer is an asynchronous, swept analyzer that displays the spectrum of the RF
signal received by the Test Set over a 5 MHz bandwidth centered on the Rx frequency. The source
of the signal for the Channel Analyzer is the receiver chain of the Test Set. Refer to Appendix B,
3900 Platform Specifications
for the Channel Analyzer’s operating parameters.
The Channel Analyzer shares the RF path from the connector to the receiver. Therefore the
Channel Analyzer is dependent on the receiver for connector selection, global attenuation and
center frequency (within ± 2.5 MHz of the received center frequency).
Basic Settings
The frequency span of the display must include the RF Frequency being examined. The Reference
Level of the display must be set so that the RF signal level falls within the display area. The
Channel Analyzer Tile can be used in minimized or maximized view.