Azden 2000XT Adjustment Manual

1.Adjustment Manual
Azden Adjustment Standard
Issue Y M D
Adjusted
date Y M D 33-543-01 (2000XT) Adjustment Manual
Power supply:3.0V
Channel and Frequency List used on the adjustment
Channel
42-01
43-47
45-47

1. Adjustment of VCO

1) Set the channel to 42-01
2) Connect the DC voltmeter to TP201
3) Confirm the DC voltmeter indicates 1.3V
4) Set the channel to 45-47 and confirm the voltage
is 2.1V on the DC voltmeter

2. Adjustment of the RF output power

1) Set the channel to CH43-47
2) Connect the power meter to CN201
3) Adjust the power to 50mW by VR201
4) Connect the spectrum analyzer to CN201
5) Confirm that the difference of the RF Level between carrier and spurious is
at least 40dB.

3. Adjustment of the transmitting frequency

1) Set the frequency to CH43-47
2) Connect the frequency counter to CN201
3) Adjust VC201 so that the frequency counter shows 649.875MHz

4. Confirm the tone frequency and adjustment of the deviation level.

1)Connect the frequency counter to TP101 and confirm the frequency is 32.768kHz.
2)Connect TP102 and GND.
3)Connect the linear detector to CN201.
4)Adjust VR3 so that the deviation level is plus-minus 3.0kHz.

5. Adjustment of the AF modulation

1)Set SW201:OFF SW2:ON
2) Connect the RC Oscillator to TP11(HOT).SHORT TP10(COLD) and GND.
3) Set the oscillator output level -35dBu(The frequency is 1kHz)
4) Connect the AC voltmeter to TP101.
5) Adjust the VR100 so that the voltmeter shows -17dBu.
6) Connect the linear detector to CN201.
7) Adjust VR202 so that the deviation level of AF&TONE is plus-minus 23kHz
8)Connect TP102 and GND.Readjust the deviation level of TONE is plus-minus 3.0kHz.
9)Set the oscillator output level to -60dBu(The frequency is 1kHz)
10)Adjust VR2 so that the first AF Level indicator appears.
Frequency
638.125MHz
649.875MHz
661.875MHz
Category
No.