Cable Tv Measurement Specifications And Characteristics - HP 8591C User Manual

Depth of Modulation
AM Range
Resolution
Accuracy
Digital Channel Power
Accuracy
FM Deviation (characteristic1
Range
Resolution
Accuracy
A M R a n g e
Resolution
Accuracy
Visual Carrier-to-Noise Ratio (C/N)*
Optimum Input Range
Maximum C/N Range
C/N Resolution
C/N Accuracy
'A preamplifier and preselector filter may be required to achieve specifications.
attenuator.
Cable TV Measurement Specifications and
Percent AM is measured from horizontal sync tip to maximum video
level; measurement requires a white-reference VITS and may not be
valid for scrambled channels.
5 0 t o 9 3 %
0 . 1 %
Measurement Characteristic
Peak reading of FM deviation
1 0 0 H z
Power-line frequency and low-frequency disturbance measured on
modulated and/or unmodulated carriers. May not be valid for scrambled
channels.
0 . 5 t o 1 0 %
0 . 1 %
The C/N is calculated from the visual-carrier peak level end the minimum
noise level, normalized to 4 MHz noise bandwidth.
S e e Graphs+
Input level dependent - See graphst
0 . 1 dB
Input level and measured C/N dependent
Specifications and Test Aids
Characteristics
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