6-2
Connector Kit
Included with the controller is a connector kit containing a 25 pin “D” connector to mate with J3, a
2.5mm power plug to mate with J2 (center pin is [+]), two 2200 ohm resistors and two .0047uF
capacitors. If the COR inputs are active low, install the 2200 ohm resistors as pull-ups on the board at
the R36 and R37 positions. If the receiver’s COR circuit in not capable of pulling down the 2200 ohm
resistor increase the resistor value to 10K ohms. If the controller is supplied with discriminator audio
install the .0047uF capacitors on the bard at the C10 and C11 positions to de-emphasize the audio.
Power Supply
The CAT-200B is powered by an external 12VDC power supply. Connect the positive lead of the supply
to the center pin of the coaxial power connector J2 and the negative lead to the outer conductor.
Audio Level Adjustment
The audio mixing-switching circuits of the CAT-200B are optimized around an input and output of –
10dBM (220mV).
Connect a signal generator to the repeater’s receiver input. Adjust the signal generator’s output for a
standard test signal of 1000 Hz at 3 KHz deviation. If a signal generator is not available, select a handi-
talkie that you suspect has the DTMF tone pad adjusted for approximately 3 KHz deviation.
Key-up on the repeater input and send a DTMF tone. Adjust the RX1 control R10 for 220 mVAC at TP1.
If a link transceiver is connected to the CAT-200B, key-up and send the LINK enable command [5001].
Key-up on the LINK receiver input and send a DTMF tone. Adjust RX2 control R16 for 220 mVAC at TP1.
Once the RX1, and RX2 audios are adjusted, key-up on the repeater input and send a DTMF tone.
Monitor the REPEATER transmitter. Adjust the TX1 Audio level control (R4) as required to set the
repeater transmitter deviation to 3 KHz or as desired. If the repeaters transmit audio input is very
sensitive and you find the TX1 Audio level control near minimum, it is strongly recommended that an
external voltage divider be installed at the audio input of the repeater’s transmitter.
If a link transceiver is connected, key-up on the repeater input and send a DTMF tone. Monitor the LINK
transmitter. Adjust the TX2 Audio level control (R11) as required to set the link transmitter deviation to
3 KHz or as desired. If the link transmit audio input is very sensitive and you find the TX2 Audio level
control is near minimum, set the jumper plug at J4 between pins 1 and 2.
Compare the receive and synthesized voice audio and adjust the voice Level (R28) as desired. The
synthesized voice should be slightly lower than the receive audio.
Unlock the CAT-200B by keying-up on the repeater input and entering: [1234567]. Key-up and enter the
[*91] test tone programming command. Verify that the test tone provides approximately 1.5 KHz
transmitter deviation. Key-up and enter [*0] to exit the programming mode.
Test Point TP1 – Receiver Audio
This test point displays the receive audio level at the input of the DTMF decoder. Adjust RX1 and RX2 for
200mVAC of DTMF audio.
To Next Page
Loading...
Need help?
General