Grass Valley 3e Student CameraMan - Manual (Page 17)

Install Your Student System
CameraMan 1-CCD and 3-CCD Student Camera System Installation and Operations Manual 11
Connecting the PRM to
the CameraMan
Using a 4-conductor cable, wired in a “straight-
through” mode and terminated with modular hand-
set connectors, connect the RS-485 port on the
back of the PRM to the RS-485 port on the back of
the CameraMan Camera.
FIGURE 2.1 PRM Connected to CameraMan
Connecting the Contact
Closure Outputs The PRM’s AUDIO RELAY and VIDEO RELAY con-
tact closure ouputs are activated when a “press-to-
talk” microphone button is pressed, and deactivated
when the button is pressed again.
AUDIO RELAY
The intended application of this relay is to activate
the mute switch of the audio system in the room to
prevent feedback when the microphone is active.
The relay activates and the contacts close only
when a microphone button is pressed. In a typical
application, the Audio Relay contact closure would
connect to an amplifier or audio switcher.
VIDEO RELAY
The intended application of this relay is to activate a
video switcher to select between various video
sources. The relay activates and the contacts close
only when a microphone button is pressed. When
the contact relay is closed, there is a two second
delay to allow time for camera movement before the
video is switched. In a typical application, the Video