Nokia 6800 Series, 7000 Series operation manual VPD-6830-XEQ, Configuration

VPD-6830-XEQ Chapter 8: VPD-6830 Programmable Video DA Series

VPD-6830-XEQ

Configuration

The R6 equalization potentiometer on the VEA-6840 (Figure 8-7) is used for continuous equalization adjustments from 0 to 1000 ft (300 m).

1.Set the Input Coupling for either AC or DC coupling using jumpers J2 and J3. See Figure 8-7 on page 76 for jumper locations.

2.Set the Clamping mode on jumper J1 to either Soft, Hard or No Clamp. See Figure 8-7 on page 76 for jumper location.

3.Adjust the gain over a range of -3 dB to +3 dB using the R5 multi-turn potentiometer in the base module.

Turn the potentiometer clockwise to increase the gain. See Figure 8-8 on page 76.

4.Adjust the equalization using the R6 multi-turn potentiometer in the base module.

Turn the potentiometer clockwise to obtain more equalization. See Figure 8-8 on page 76.

5.Make fine adjustments to the high-frequency response using the R21 single-turn potentiometer in the base module.

The high-frequency response is factory-set/calibrated. Readjustment is not recommended without precise test equipment. See Figure 8-8 on page 76.

6.Select the cable length range compensation with jumpers J1 and J2, located on the VPD-SBEQ submodule. See Figure 8-7 on page 76.

6800/7000 Series - Distribution and Routing Products Installation and Operation Manual 75