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RF Technology R350/R500
7
SPECIFICATIONS
7.4.20 Carrier Operated Switch Output
7.4.19
Channel Select Input/Output
Coding
:
8 lines BCD coded 00-99
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
Ω
Line:
Internal connections are provided so that the opto-coupler can be connected to the
600
Ω
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
or 20mA Maximum
Vc = 30 Volts
15 V 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.
