User Manual

RF Technology R220 Page 23
7 SPECIFICATIONS
7.4.20 Carrier Operated Switch Output
Logic Input Levels:
0 = < 0.4 Volts
1 = > 3.5 Volts
Internal 10K pull down resistors selects Channel 00 when all inputs are O/C.
7.4.20 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
Line:
Internal connections are provided so
that the opto-coupler can be connected to the 600
line for use over a single pair.
This permits remote switching with no extra connections.
Current Source/Sink, Collector Voltage:
The COS output is implemented with an
optocoupler whose ratings are:\\
Ic = 10mA Maximum
Vc = 30 Volts Maximum
7.4.21 CTCSS
The CTCSS decoding is provided by a hybrid module. This provides programmable
decoding of all 38 EIA and 12 other common tones. Refer to table 4.