Chapter 6: VEA-6830 Video Distribution Amplifier Module | Operation |
| |
Operation
A multi-turn Gain potentiometer provides adjustment over a range of -3 to +3 dB. The gain is increased when this pot is adjusted clockwise. Another multi-turn Equalizing potentiometer is used to adjust cable equalization. It is adjusted clockwise to obtain more equalization.
A single-turn Response potentiometer allows fine adjustment of the high-frequency response. However, 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.
There is no need to terminate unused outputs; however, a perfect response can be obtained if unused outputs are terminated.
Jumper J1 sets internal 75 termination. If removed, it makes the input high-impedance.
Figure 6-2. Front Edge View
| | A P1 |
| GAIN | B |
| C |
| |
| EQ | D |
| | E |
| | F |
| | H |
| | J |
| | K |
| | L |
| | M |
| | N |
| | P |
| | R |
| | S |
Figure 6-3. VEA-6830 Module Top View
52 | 6800/7000 Series - Distribution and Routing Products Installation and Operation Manual |
