Monroe Electronics R159A - Manual (Page 6)

6
INSTALLATION
MOUNTING:
The R159A requires a minimum of 3.5 vertical inches of space in a standard 19-inch wide EIA
equipment rack. Slide the unit into the rack frame and secure it, using the 3000R/22M mounting
hardware supplied with the unit.
CONNECTIONS:
For each of the three sections, the primary video is connected to the primary video F connector
and the secondary video to the secondary video F connector. Make sure the video at the
primary input is 0 +3 dBmV, and that the secondary input is 0 +3 dBmV. The two output F
connectors may be connected to whatever input the user desires. If one of the outputs is not
used attach a 75
Ω terminator to that F connector.
For each of the three sections, the primary composite audio is connected to the primary 4.5
MHz F connector and the secondary composite audio is connected to the secondary 4.5 MHz F
connector. The outputs from the 4.5MHz switch are connected to the desired inputs. If one of
the outputs is not used attach a 75
Ω terminator to that F connector.
OPERATION:
Whenever the video signal on the primary video connector drops below –3 dBmV the video
output is switched to the secondary input. At the same time, the composite audio input is
switched to the secondary input. When the switch occurs, a solid-state contact closure to
ground occurs at the alarm output connector pin and the red LED on the front panel illuminates.
When in alarm condition, the operator may force the switch back to primary inputs by closing the
test switch input on the connector to ground. This enables the operator to check the status of
the primary inputs manually.
POWER:
The R159A requires 9 VAC. Attach the power pack’s wires to the appropriate screw terminals
on the back of the R159A and plug it into a 120 VAC outlet.