Specifications

Chapter 7  Special Applications 43
Chapter 7  Special Applications
The features and flexibility of the multiplexer make it a powerful
tool in special applications where unique capabilities are required.
This section describes several ways to use the multiplexer.
SIMULTANEOUS RECORD
AND PLAY
The multiplexer circuits simultaneously encode and decode video.
This is referred to as full duplex operation, which uses two VCRs.
The unit can encode camera video to one VCR while it decodes
and displays video played on a second VCR. The two operations
do not interfere with each other. Without this capability, camera
video recording must stop while a previously recorded tape is
viewed.
Full duplex capability is most important in applications that
demand continuous video recording of multiple cameras. It allows
an operator equipped with a second video recorder to review
multiplexer tapes without interrupting the recording process.
Refer to Figure 2  Multiplexer System with Two VCRs. To add a
second VCR to a standard multiplexer installation:
1. Connect a cable to video in on the VCR and connect the
other end of this cable to the multiplexer vcr out connector.
This VCR is now dedicated for tape recording.
2. Connect another cable to the video out of the second VCR
and the multiplexer vcr in connector. This VCR is now
dedicated for tape playback.
Multiplexer operation is similar when connected to two VCRs.
The difference is that recording and playback are performed by
separate VCRs.