Contributor: Paul Broome
Company: Sensormatic VPD

Multiplexer Applications & Troubleshooting Guide

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The Nuts and Bolts

This section contains an in-depth view of the multiplexer rear panel. It will explain the purpose, functions and what to expect from each connector. The signals at each BNC connector are composite video. Each BNC connector is intended for a particular purpose, however, since a standard video signal is involved, it can be used for any purpose.

Camera inputs: There are 16 camera input BNC connectors. These inputs are expecting to see a 1 volt peak to peak composite video signal. This signal typically comes from a camera, however, it can come from any video source (VCR, monitor loop out, etc.)

Camera outputs: There are 16 loop out BNC connectors. These connectors are a convenience for sending camera inputs to additional devices.

Main monitor out: This BNC connector provides multi-screen video for display on a monitor. Depending on the buttons selected on the multiplexer front panel, it will display full screen images, sequenced images, picture in picture, 2x2, 3x3 and 4x4 displays.

Call monitor out: This BNC provides full screen images. The camera displayed is selected from the multiplexer front panel (or, remote panel,) or, selected as a result of an alarm input.

VCR Out: This signal is intended for connection to a VCR input for the purpose of recording multiplexed images. It outputs alternately switched cameras at a speed based on the VCR record setting selected in the menu. Time, date and camera information is encoded in the vertical blanking interval.

VCR Input: This input is intended to receive the playback output of a VCR. The multiplexer decodes this input and displays as selected by the operator.

* The VCR in and out can be used to connect multiplexers "back to back." See the applications section for details.

• S-VHS Out: This connector provides S-VHS output for recording on an S-VHS recorder.

  S-VHS In: This connector receives the playback output of an S-VHS VCR.

* When the VCR BNC outputs are used, the S-VHS connectors are disabled, and vice versa.

Power Connector: This input power connector is expecting 12 volts DC from a wall mount power supply. All multiplexers use l2VDC at 1.5 amps. This is the minimum requirement.

Remote connector: The 25 pin connector allows remote control of the multiplexer, either from a remote panel (up to 1000 feet distance,) or, from a remote source of ASCII commands (typically a PC.)

Alarm Connector: This connector allows one alarm input per camera. Alarm inputs will work as contact closures, or, UL (0 - 5 volts.) There is a contact closure alarm output intended for use with a VCR.

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