Nokia 7000 Series, 6800 Series operation manual Operational Adjustments, Installation

Chapter 5: VDA-6830 Video Distribution Amplifier Module Installation

Installation

The VDA-6830 module can be installed in a Leitch FR-680x or FR-7001 series frame, or an FR-7000MB MIX BOX frame. If this module is installed in an FR-7001 series or FR-7000 MB MIX BOX frame, a 6800-M back module is required.

There is no need to terminate unused outputs; however, doing so will improve response.

A jumper near the board connector provides a selection of input impedance between 75￿ and high impedance. This jumper should be removed if high-input impedance is required.

Operational Adjustments

The potentiometer is factory set, and re-adjustment is not recommended without precise test equipment.

A multi-turn Gain potentiometer provides adjustment over a range of -3 to +3 dB. A single-turn potentiometer allows fine adjustment of the high-frequency Response (10-30 MHz).The gain is increased when the potentiometer is adjusted clockwise.

Both the Gain and Response controls are located on the front edge of the module.

46 6800/7000 Series - Distribution and Routing Products Installation and Operation Manual