SP205EQ
DUAL 1x5 VIDEO & AUDIO DISTRIBUTION AMPLIFIER
WITH EQUALIZATION & LEVEL CONTROL
ELPRO Video Labs s.r.l.
Str.da della Pronda, 45/B 10142 TORINO - ITALY
Tel.+39 0117701583 – Fax +39 011703751
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4.0 ADJUSTMENTS
4.1 Adjustment of video signal level
Each of the two video 1x5 sections is fitted with a circuit for independent
adjustment of output signal level, with a maximum range of ±3dB.
With this capability, the user can regulate the output signal if the source used
does not generate a standard amplitude signal (1Vpp).
It must not be used to offset cable losses, for which reference should be
made to the next paragraph.
For calibration, proceed as follows:
a) Using a TV generator, send the unit a signal that permits easy
identification of the level of white (e.g. 75% or 100% bars, multiburst
etc.).
b) Connect one of the outputs of the related section to an oscilloscope or
other suitable video signal measurement instrument.
a)
Adjust the trimmer on the front panel (VIDEO1/LEVEL or
VIDEO2/LEVEL according to section) so that white amplitude is 0.7V
(1V including synchronism which must be 300 mV). If the unit is used in
1x10 mode, the adjustments must be made on both trimmers,
monitoring 1 of the 5 outputs at the top when operating on the
VIDEO1/LEVEL trimmer and 1 of the 5 outputs below when adjusting
the VIDEO2/LEVEL trimmer.
