Nokia 7000 Series Operation, Gain Eq Response, 3. VEA-6840 and VEA-6840-RMV Card-Edge Views

Chapter 7: VEA-6840 Video Equalizing Amplifier Module Operation

Operation

GAIN EQ RESPONSE

VEA-6840

R5 R6

GAIN EQ

RMV

Submodule

R21

RESPONSE

VEA-6840

R5 R6 R21

Figure 7-3. VEA-6840 and VEA-6840-RMV Card-Edge Views

Amulti-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.

Asingle-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.

62 6800/7000 Series - Distribution and Routing Products Installation and Operation Manual