Sigma VDA-100A Video Distribution Amplifier (NTSC)

The Sigma VDA-100A NTSC Video Distribution Amplifier is designed to provide six (6) outputs from a single video signal source. The module is compatible with either NTSC, or PAL video signals.

Wiring to the module is performed via connectors on the rear panel. There is a looping input on the rear panel of the unit. The INPUT is a high impedance configuration. This allows the video signals to loop to other units. To ensure proper impedance matching it is necessary to terminate the input with a 75Ω load. When multiple units have the same source looped only apply the 75Ω resistor to the last unit in the line. The looping configuration may be used for as many as five
modules to increase the number of available outputs.

There are six (6) outputs on the rear panel of each unit. Each output is designed to drive a 75Ω
load. It is not necessary to terminate unused outputs. The gain adjustment on the front panel can be accessed through the provided slot on the VDA-26. The variable gain control (R26) provides adjustment of at least }1.5 dB. Gain and frequency response are both set for optimum performance by Sigma Electronics.