Ceyear 4992A, User Manual

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Chapter VI Operating principle
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interface/display drive and relevant power circuits. On one hand, the overall control can be
coordinated. On the other hand, battery charging can be managed and the overall power supply
can be provided.
Specifically, the full duplex connection between the tested radio and instrument can be
realized by the RF module. At the same time, the IF signal can be transferred to the IF processing
unit. The hardware basis of integrated test formed by the RF module, digital signal processing
platform and microprocessor. The following functions can be realized: real-time RF frequency
error measurement, IF modulation/demodulation, received signal strength measurement, etc. The
real-time spectrum analysis can be done for transmitter signals to complete the comprehensive
measurements of most of performance indicators of the radio. The audio signal generator is used
for providing audio signals for the radio test, and the audio analysis module is used for testing the
audio distortion, audio SINAD and audio frequency. The output can be displayed on the
oscilloscope.