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

Ω

ΩΩ

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 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.