Alignment Procedure; Equipment Required - Telex Radiocom BTR-200 Series Service Manual

ALIGNMENT PROCEDURE:
)
Equipment Required:
D
Signal Generator
D
Audio Generator
D
Deviation Meter
D
Audio Voltmeter
1. Connect the audio generator to the AUX IN
jack and set the output to 20 mV at 1
KHz.
2. Select the AUX pushbutton on therront panel.
3.
Adjust VR601 (located just under the I1C push-
button on the front panel) to maximum
counterclockwise.
4. If the base is configured for an RTS intercom
connect the load to the llC jack
pn the rear
panel.
5. Connect the audio voltmeter to the AUX OUT
0
jack on the rear panel.
6. Adjust VR101 for a minimum reading.
7.
Disconnect the generator and meter from the
AUX jacks and de-select the AUX pushbutton
on the front panel.
8. Connect the signal generator to the Receive
Antenna jack. Set the deviation to
±
3 KHz at
1
KHz.
Set the output to 1 m
V.
Set the frequen-
cy to the channel 1 frequency listed in the chart
of the receive board alignment.
-
I
9.
Select the channel 1 pushbutton on the front
panel.
10. Connect the deviation meter to the ANT
TRANS jack.
11. Connect the audio voltmeter to U106 pin
7.
12A. On version 1 and 2 audio boards, adjust VR102
for
300
mV of audio.
12B. On version
3
and later audio boards with ver-
sion 1 transmit boards, adjust VR102 for 1 volt
of audio.
12C. On version 3 and later audio boards with ver-
sion 2 transmit boards, first move the audio
voltmeter to U501 pin 16 (on the transmit
board). Then adjust VR102 for 140 mV of
audio.
13. Adjust VR501 for
±
4.2 KHz deviation.
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