Motorola HT 1000 ユーザーズマニュアル

27

RX VCO Crossover
Procedure

1. From the SERVICE menu, press F3 to select RECEIVER alignment.

2. Press F5 to select the RECEIVE VCO CROSSOVER softpot. The 

screen will indicate the receive test frequency to be used.

3. Connect a dc voltmeter capable of 1mVolt resolution to test point 

5 (TP5), which is accessible through a hole in the bottom side VCO 
circuitry shield.

4. Beginning with the default softpot frequency of line 2, adjust the 

UP/DOWN arrow keys until the voltage reading at TP5 is
3.0 ±0.1volts.

5. Press F8 to program the softpot value.

6. Press F10 twice to return to the SERVICE menu.

Transmit deviation balance compensation and transmit deviation 
limit adjustments should be completed before signalling deviation is 
adjusted.

DTMF Tuning

1. From the SERVICE menu, press F4 to select SIGNALLING 

alignment.

2. Press F2 to select the DTMF softpot.

3. Press F6 to key the radio on the test frequency. The screen will 

indicate that the radio is transmitting.

4. Measure the DTMF deviation on your service monitor.

5. Use the UP/DOWN arrow keys to adjust the DTMF deviation per 

Table 18.

6. Press F6 again to dekey the radio.

7. Press F8 to program the softpot value; press F10 to return to the 

SIGNALLING menu.

High Speed Signalling

1. From the SERVICE menu, press F4 to select SIGNALLING 

alignment.

2. Press F3 to select the TRUNKING HIGH SPEED softpot.

3. Press F6 to key the radio on the test frequency. The screen will 

indicate that the radio is transmitting.

4. Measure the TRUNKING HIGH SPEED deviation on your service 

monitor.

5. Use the UP/DOWN arrow keys to adjust the TRUNKING HIGH 

SPEED deviation per Table 18.