Specifications

13. Repeat steps 11 and 12 several times checking de-
viation and the demodulated waveform since R544
and R583 interact.
Internal DCS Adjustment
14. Preset R562 (INTERNAL DCS DEV. ADJ.) to
mid-range, if not already done.
15. Remove the 1000 Hz tone.
16. Set the unit to a channel programmed for a DCS
tone or on repeater units, program the unit for a
DCS tone.
17. Adjust R562 (INTERNAL DCS DEV. ADJ.) for ±
700 Hz deviation.
Internal CTCSS Adjustment
18. Set the unit to a channel programmed for a CTCSS
tone or on repeater units, program the unit for a
CTCSS tone.
19. Adjust R556 (INTERNAL CTCSS DEV. ADJ.) for
± 700 Hz deviation.
External CTCSS/DCS Adjustment
20. Connect a source of external tones to P502-13
(DB-15 Connector on rear panel).
21. Set the unit to a channel programmed to an exter-
nal tone or for repeater units, program the unit for
external tones.
22. Adjust R581 (EXTERNAL TONE ADJ.) for ± 700
Hz deviation.
23. Reconnect the audio generator. Set the generator
for a 1000 Hz tone and check that ± 5 kHz devia-
tion is not exceeded in any channel that was used
in step numbers 9 through 22. Repeat steps 9
through 22, if necessary.
DTMF/ID Tone Adjustment
24. Turn the unit OFF. Wait at least 30 seconds. De-
press the T button (MON button on the repeater)
and activate the PTT while turning the unit on.
The unit should begin transmitting, with dual-tone
modulation for a base unit and single tone modula-
tion for a repeater. The PTT switch and the T (or
MON) button may be released. The unit should
continue transmitting.
25. On base units, adjust R511 (DTMF ADJ.) for ± 3
kHz deviation. On repeater units, adjust R511 for
± 2 kHz deviation. Turn the unit OFF, wait at least
30 seconds and turn the unit back ON for the re-
mainder of the alignment steps.
Repeat Audio Adjustment
26. Reprogram the unit so that no tones are pro-
grammed on receive. If the REP LED is not illu-
minated, depress the REPEAT button. The REP
LED should illuminate.
27. Connect an RF signal generator to the ANTENNA
(not TX ANTENNA) connector input on the rear
of the unit. Set the generator to the receive channel
frequency with an RF level of 100 microvolts and
with 1000 Hz tone modulated at ± 3.0 kHz devia-
tion.
28. Adjust R507 (REPEAT AUDIO ADJ.) for ± 3.0
kHz deviation shown on the demodulator.
Interconnect Audio Adjustment
This adjustment need only be performed if
the user wishes to transmit CTCSS and/or
DCS tones from an external source.
NOTE
A base unit’s test modulation is dual-tone,
while a repeater’s test modulation is single
tone.
NOTE
Repeater units only.
NOTE
This adjustment need only be made if the user
wishes to use the interconnect input.
NOTE
AE/LZB 119 1882 R1B
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