User's Manual Part 6
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1 The adjustment section assumes that the T2000 radio has been correctly aligned
for normal operation. Refer to Section 8.14.3, “Line Interface Options” and the cir-
cuit diagram for linking and application details.
2 If the logic and T2000-80 PCBs are unscrewed and folded out for adjustment, a
wire should be temporarily fitted from the radio chassis to the options chassis
ground pad (S35), as shown in Figure 8.14.1.
3 Signals for balanced transmissions are generally less than 0dBm, and are typically
between -10dBm and -20dBm.
4 Ensure that the
LED is on (
LED on trunking radios).
Deviation settings are given first for wide band radios, followed by settings for
narrow band radios in brackets [ ].
##,
1 Ensure that the
LED is on (
LED on trunked radios).
2 Monitor the line output (S21 pin 5).
Apply an on channel signal from the RF signal generator at an output level of
-70dBm, modulated to ±3kHz [±1.5kHz] deviation, at 1kHz AF.
Adjust the RV1 (line output control) for the required output level.
If the line output level is to be less than -15dBm, short LINK6 (600Ω output) and
remove LINK5, to select 15dB of attenuation.
#,
1 Monitor the line input (S21 pin 15).
Ensure the
indicator is off, and key the transmitter via the opto input (+8V).
2 Adjust RV2 (line input sensitivity control) until ±3kHz [±1.5kHz] deviation at
1kHz is achieved.
For input signals of greater than -15dBm, set the line input attenuation for 15dB
(LINK11 open).
7
!
This circuit delays audio gate turn on after PTT, to prevent squelch noise bursts in
repeater applications.
1 Enable the time delay circuit by solder shorting LINK23.
2 Set the required time delay using RV3 (time delay control).
Fn
Fn