680 Series Video Distribution Amplifiers Installation and Operation Manual 13
Chapter 3: VDA-683 Differential Input Video Distribution Amplifier Modules
Operation
Two potentiometers are located at the front-edge of the module: GAIN and
RESPONSE.
• A multi-turn GAIN potentiometer provides adjustment of over a range of –3
to +3dB. The gain is increased when this potentiometer is adjusted
clockwise.
• A single-turn potentiometer allows fine adjustment of the high-frequency
RESPONSE. It has been factory-set/calibrated; readjusting is not
recommended without precise test equipment.
Figure 3-3. Gain and Frequency Response Adjustments
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