Operations Manual

Page 26 RF Technology R50
7.4.21 Carrier Operated Switch Output
7 SPECIFICATIONS
7.4.21 Carrier Operated Switch Output
Floating Opto-Coupler Output
The carrier operated switch output is via an Opto-coupler. Collector and emitter
connections are available to allow connection for source or sink.
The Opto-coupler can be linked inside the receiver to be on when a carrier is detected
or to be on in the absence of carrier.
Connection to Remote Switch via 600 Ohm Line
Internal connections are provided by a relay so that 12VDC can be connected to the
600 Ohm line for use over a single pair.
7.4.22 Current Source/Sink, Collector Voltage
Ic = 10 mA Maximum
Vc = 30 Volts Max
7.4.23 CTCSS
The CTCSS decoding is provided by a U602. This provides programmable decoding
of all 38 EIA and 12 other common tones. See Appendix C for tone squelch
frequencies.
7.4.24 External Squelch Input
An external input is provided to squelch or mute the receiver audio output. This may
be used in conjunction with an external decoder or to mute the receiver during
transmissions.
The External Squelch Input can be connected to the T/R Relay pin on Eclipse
transmitters mute the receiver during transmission.
7.5 Connectors
7.5.1 Antenna Connector
Type N Female Mounted on the module rear panel
7.5.2 Power & I/O Connector
25 pin "D" Male Mounted on the rear panel