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

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

VPD-6830-DEQ

Configuration

Before adjusting R6, the potentiometer R5 on the SBDEQ must be set to zero (turn R5 counterclockwise to its minimum adjustment value).

1.Set the Input Coupling for either AC or DC coupling using jumpers J2 and J3. See Figure 8-11 on page 82 for jumper locations.

2.Set the Clamping mode on jumper J1 to either Soft, Hard or No Clamp. See Figure 8-11 on page 82 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 8-12 on page 82.

4.Adjust continuous equalization to the Belden 8281 using the R6 multi-turn potentiometer in the base module.

Turn the potentiometer clockwise to obtain more equalization. See Figure 8-12 on page 82.

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 8-12 on page 82.

6.Turn-off R6 on the main board (counterclockwise to minimum). Adjust R5 on the SBDEQ to obtain the required equalization for Nokia 0.6/2.8 cable.

6800/7000 Series - Distribution and Routing Products Installation and Operation Manual 81