Video Cassette Recorders

Effective use of the patch panel and patch cords

Cameras mounted on the diplexer accept images

from the slide or film projectors. This is determined

increases system flexibility and simplifies trouble-

shooting and maintenance of the SITE system.

by the position of the movable mirror located in the

optical mirror assembly. The input image is processed

The patch panel serves four principal purposes.

through the camera electronics and emerges as a

Since all signals to and from the major pieces of

composite video signal. This video signal is then

equipment are routed through the panel, it provides

processed through the control bay and presented to the

convenient locations for testing signal levels and

modulators and/or to one of the video cassette

continuity. The patch panel can be used to bypass a

recorders (VCRs) for taping and to the control

defective unit so that operation can continue while

monitoring units.

repairs are being made. Also, the patch panel provides

Monitoring of cameras 1 and 2 is done by

a means of introducing auxiliary inputs into the

system. When programming requirements call for

observing the display at the camera monitor. This is

making an audio and/or video recording, the patch

located at the upper left portion of the left dual bay

panel can be used to feed the signals to the proper

(fig. 8-2 1). Selecting either camera 1 or 2 to monitor

recorder.

is done by a switch on the camera monitor panel.

Audio Cartridge Recorder/Reproducer

Video Cassette Recorders

The ITC RP-0001 recorder/reproducer is located

Two Sony SLO-320 color VCRs are mounted in

in the right dual bay (fig. 8-22). The equipment is

the lower portion of the left dual bay (fig. 8-21). Video

designed to operate exclusively for audio cartridge

output from these VCRs may be monitored by

tape recording and reproducing. It has the capabilities

positioning the toggle switch on the control panel of

of playback of prerecorded audio and recording audio

the VCR monitor to the correct position.

for playback. Audio input and output cables are wired

through the patch panel to the audio mixer/monitor.

Patch Panel

With proper use of the mixer/monitor and patch panel,

any audio source can be recorded and played back.

All audio and video signals originated by the

system or entering the system are connected directly

Audio Mixer/Monitor

to the patch panel. From there they are routed into the

system on preestablished (normal) signal paths or

The Ramko audio mixer/monitor is located in the

alternate paths manually selected by patch cords.

left dual bay (fig. 8-21). This device has the capability

of monitoring and controlling all audio signals

The patch panel is an assembly of 52 audio and

generated in the system. Monitoring is accomplished

video jacks, 48 of which are dedicated. Designation

by the monitor select push buttons, built-in loud-

strips above or below each jack identify the source

speaker, and monitor volume control. Undesirable

equipment or the receiving equipment for each jack,

audio crisscrossing is possible. Care must be taken to

Normally the jacks in the upper row receive signals to

depress the proper push buttons.

the equipment, In normal operation they act as in/out

jacks; that is, a signal received through a jack on the

Color Monitor

top panel is connected to the jack immediately below

it, Their normal connections are internal, and do not

Mounted in the upper portion of the right dual bay

require looping plugs.

is the 12-inch color monitor (fig, 8-22). The monitor

Occasionally it is desired to reroute a signal from

displays the R output signal from the Telemet

its normal path. In this case a patch cord can be

modulatators (which are discussed later) or the video

connected from a source jack to an input jack.

output signal. The receiver/monitor toggle switch,

Insertion of a patch-cord plug into an upper or lower

located on the monitor control faceplate, switches

jack breaks the normal through connection. The other

from one display to the other.

end of the patch cord can then be connected to

whatever jack will give the desired connection.

Waveform Monitor

Removing the patch cord from the jacks reestablishes

Directly associated with the input to the

the normal connection. Four video coaxial patch cords

receiver/monitor is the waveform monitor. This is

and six audio patch cords are supplied with the system.

8-25