1-1
SECTION 1
INTRODUCTION
1-1 GENERAL
The COM-120C is a microprocessor controlled, digitally synthesized communication
service monitor, which combines the operations of many different test instruments into a
single, compact unit. The COM-120C is capable of performing these functions:
RF Generator RF Receiver
Full Duplex Operation Spectrum Analyzer
Audio/Data/Signaling
Generators
Oscilloscope
DVM Deviation Meter
Distortion Meter SINAD Meter
Audio Frequency Meter Frequency Error Meter
RF Power Meter Modulation Meter
Received Level Meter
The COM-120C utilizes an alphanumeric keypad, dedicated function keys, multitask
“Soft” Function Keys and a high resolution, monochrome flat panel display. Perform
tests remotely or manually. Microprocessor controlled memory allows parameter
storage and recall. For instance, store and recall Oscilloscope and Spectrum Analyzer
traces for signal comparison.
The COM-120C performs a multitude of important functions simultanelusly. The three
basic modes of operation are: RF Generate Operation, RF Receive Operation and
Duplex Operation. These modes allow generate and receive functions in duplex and
simplex mode, while testing other aspects of the Unit Under Test like Modulation Level,
Power, Sensitivity and Frequency Error.
Additionally, the COM-120C provides these independent test instruments:
Audio/Data/Signaling Generators
Oscilloscope
Spectrum Analyzer
Meters
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General