VeEX VePal CX350, Руководство пользователя

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Digital Scan
The following measurements will be performed for each digital channel:
QAM Power Level in dBmV
System Scan
System Scan
Once the test is completed or stop by the user, a marker is available and can be placed on any of the measured channel. The measurements of the selected channel are
then displayed.
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7.4 Spectrum Analysis
Overview:
The spectrum analyzer, like an oscilloscope, is a basic tool used for observing signals. While an oscilloscope provides a window into the time domain, the spectrum analyzer
provides a window into the frequency domain. Spectrum analysis provides a convenient way to measure the amplitude of digitally modulated carriers and to troubleshoot
ingress in the forward and reverse paths.
The following measurements and capabilities are possible:
Analog Channels:
Direct channel tuning and positioning of visual and audio carriers
Visual and audio carrier level and frequency measurement
Survey of system visual and aural carrier levels and frequencies
Depth of modulation measurement
Audio carrier FM deviation measurement
Visual carrier-to-noise measurement
In-channel response measurement
Hum/low-frequency disturbance measurement
Intermodulation distortion measurement (CTB and CSO)
Digital Channels:
(applicable to QAM, QPSK, and OFDM signals)
Average power
Adjacent channel leakage (ACL)
CSO and CTB
CX350 e-Manual D07-00-037 RevC01 Page 31 of 81