Print Date 04/01/11 Page 15 of 42 E2165-00MA-04
1.3.3: Composite Input Module Specifications (/M option only)
Composite Input
DC to 100kHz input via floating 75
Ω
BNC connector.
Input impedance internally preset to :-
balanced 75
Ω
or 20k
Ω
(coaxial screen floating)
or unbalanced 75
Ω
or 13.3k
Ω
(coaxial screen internally grounded)
Input sensitivity for
±
67.5kHz deviation (exc. pilot): +8dBu : 5.5V peak to peak
(adjustable from rear panel with maximum sensitivity typ4dBu/3.5V).
Overall frequency response : better than
±
0.2dB over 5Hz - 15kHz (rel. 1kHz)
Measured with deviation (excluding pilot) set to 18dB below
±
67.5kHz (
±
8.4kHz)
at 400Hz modulation - fixed test level to pre-emphasised test source then
causing deviation to rise with modulation frequency.
Overall stereo separation : better than 48dB over 40Hz to 10kHz (typ. 55dB)
Overall harmonic distortion : better than –60dB (0.1%) over 40Hz to 10kHz
(typ. –66dB). Measured in a bandwidth of twice the fundamental to 22kHz.
Overall signal to noise ratios better than : - RMS A weighted : 75dB
RMS CCIR468-3 weighted : 65dB - RMS unweighted : 70dB
Q-Peak CCIR468-3 weighted : 65dB - Q-Peak CCIR unweighted : 65dB
All measured relative to deviation of
±
67.5kHz (excluding pilot) and 400Hz
modulation (set up with an RMS unweighted measurement).
