Operation – Nokia 6800 Series User Manual
Page 89
Chapter 7: VEA-6840 Video Equalizing Amplifier Module
Operation
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6800/7000 Series - Distribution and Routing Products Installation and Operation Manual
Operation
Figure 7-3.
VEA-6840 and VEA-6840-RMV Card-Edge Views
A multi-turn potentiometer Gain (R5) allows for adjustment to the gain
over a range of ±3 dB. The gain is increased when this potentiometer is
adjusted clockwise. Another multi-turn potentiometer EQ (R6) allows
for adjustment to the equalization. It is adjusted clockwise to obtain
more equalization.
A single-turn potentiometer Response (R21) allows for fine adjustment
to the high-frequency response. It is factory-set/calibrated, and
readjustment is
not
recommended without precise test equipment.
These three potentiometers are located at the front edge of the module.
GAIN
EQ
RESPONSE
RESPONSE
R5
R5
GAIN
EQ
R6
R6
R21
R21
VEA-6840
VEA-6840
RMV
Submodule