Automatic im distortion test selector

Details Automatic im distortion test selector Automatic im distortion test selector

G - Physics

01

R

379/2, 324/59, 3

G01R 29/06 (2006.01) G01R 23/20 (2006.01) G01R 27/00 (2006.01)

Patent

CA 1167107

-12- AUTOMATIC IM DISTORTION TEST SELECTOR Abstract An intermodulation test analyzer which auto- matically determines whether an SMPTE or CCIF inter- modulation test is being conducted and switches its output accordingly is disclosed. This is accomplished by sensing the low frequency energy content of the test signal. This energy content is compared to a reference level representative of the low frequency energy content of a typical SMPTE test signal. There- fore, if the low frequency energy content of the input signal is greater than the reference level, the signal is treated as the SMPTE test signal. However, if the low frequency energy content is less than the refer- ence level, the signal is processed as a CCIF test signal.

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