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.