SUBJECTIVE EVALUATION OF FM/FM PROTECTION RATIO FOR TELEVISION BROADCASTING BY SATELLITE

Authors
  1. Loo, C.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The report describes subjective measurements of the interference between two FM and TV signals at the same carrier frequency and at different carrier frequencies. The results show that there is no masking of the interference due to additive Gaussian noise in the wanted channel as reported by others. Also, the results do not support the conclusion that an impairment grade of 4.5 on the CCIR scale is subjectively equivalent to just perceptible interference. Finally, a comparison of results of measurements of the protection ratio and its variation with frequency offset with those obtained by others shows reasonably good agreement.
Report Number
1340 — Appendices A and F included
Date of publication
15 Dec 1980
Number of Pages
68
DSTKIM No
82-01148
CANDIS No
35729
Format(s):
Hardcopy;Originator's fiche received by DSIS

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