Monroe Electronics R174A - Manual (Page 4)

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DESCRIPTION
Monroe Series 3000, Model R174A Audio/Video-IF/RF Relay Panel will switch any combination
of baseband audio follow video and IF/RF frequencies from 0 to 950 MHz.
The unit contains high quality RF and Audio relays capable of more than 100,000 operations
without failure.
“BNC” connectors are used for the video and IF/RF signals and screw terminals for wiring the
baseband audio signals.
Each of the four (4) switch sections contains a DTMF decoder that may be used for automatic
switching of the section by a control tone sequence selected by the user. The sequences could
come from networks, satellite providers or other programmers.
Switches can be controlled by DTMF (cue tones), contact closure, or an RS-485 command from
a computer. Up to 15 pf these units may be connected via RS-485 to one control computer.
Priority of switching is described in the installation instructions.