Uniden 2020 Скачать руководство пользователя страница 15

UNIDEN 2020 

Sid 15 (26) 

3. 

LOCAL OSCILLATOR UNIT (PC-092) ALIGNMENT. 

3-1. 

Test Equipment Required 

(

1

) RF Voltage Meter. 

(

2

) Frequency Counter. 

(

3

) Sweep Generator. 

(

4

) Oscilloscope. 

3-2. 

Xtal Oscillator Output Adjustment. 

(

1

) Connect RF voltage meter to TP102. 

(

2

) Select BAND SWITCH in order, starting from 15.0 MHz, according to  

chart 3-2-1-A and adjust each coils in 3-2-1-B so as to get 1.5V r.m.s. meter 
readings, respectively. 
 
Chart 3-2-1 
 

BAND 

COIL (see 3-2) 

Freq. (see 3-3) 

TRIMMER (see 3-3) 

15.0 

L101 

37.025 MHz 

C116 

3.5 

L102 

25.525 

C117 

7.0 

L103 

29.025 

C118 

14.0 

L104 

36.025 

C119 

21.0 

L105 

43.025 

C120 

28.0 

L106 

50.025 

C121 

28.5 

L107 

50.525 

C122 

29.0 

L108 

51.025 

C123 

29.5 

L109 

51.525 

C124 

27.0 

L110 

49.025 

C125 

 
 

3-3. 

Xtal Oscillator Frequency Adjustment. 

(

1

) Connect Frequency Counter to TP102 through 1pF capacitor. 

(

2

) Select BAND SWITCH in order starting from 15.0 MHz according to the 

chart 3-2-1-A  and adjust each trimmer in 3-2-1-D so as to obtain frequency 
readings as shown in 3-2-1-C respectively. 

3-4. 

VCO Buffer Amplifier Adjustment. 

(

1

) Connect RF voltage meter to DRAIN of Q113. 

(

2

) Set BAND SWITCH to 3,5 MHz. 

(

3

) Set SEGMENT SWITCH to 200/700 kHz. 

(

4

) Turn and set the dial to 50 (center) readings. 

(

5

) Adjust L121 and L122 to get maximum meter readings. 

 

 

Содержание 2020

Страница 1: ...r 2 2 Adjustment Procedures 1 Connect FrequencyCounter to the Pin 1 Marker output of J751 on the operation unit 2 Activate MARKER OSCILLATOR by pulling out RF ATT knob 3 Tune trimmer capacitor C753 so...

Страница 2: ...ITCH to USB 3 Set BAND SWITCH to 14 0 SEGMENT SWITCH at 200 300 and tune the main dial to recive 14 200 MHz signal 4 Turn RF GAIN CONTROL fully clockwise 5 Turn RF ATT CONTROLL fully clockwise 6 Tune...

Страница 3: ...at 14 2 MHz to obtain maximum outout 4 Set MODE SWITCH to USB 5 Turn MIC GAIN CONTROL fully clockwise 6 Set Meter Switch to ALC position 7 Set AG 1 frequency to 1 900 Hz and AG 2 s to 2300 Hz 8 Measu...

Страница 4: ...d jack as indicated below 1 RF POWER AMP SWITCH Off 2 Connect external speaker 4 ohms or 4 ohm dummy load to the EXT SP jack 1 3 Set PWR SWITCH to ON after completion of all preparations as mentioned...

Страница 5: ...on each band 5 Control SSG output during this process to make adjustment easier Chart 2 2 1 A B C BAND SEGMENT FREQ MHz COIL No 15 0 0 500 15 000 L201 L208 3 5 100 600 3 600 L202 L209 7 0 100 600 7 1...

Страница 6: ...then CONNECT the IF UNIT to the EXTENSION BOARD 3 3 Coil Adjustment 1 Process the same as 2 4 1 4 2 Adjust L351 L354 to get the maximum readings or S Meter or mV 3 4 Carrier Balance Adjustment 1 Proce...

Страница 7: ...ollowing instructions at the position of the wordings OBTAIN MAXIMUM OUTPUT AT MHz which will be mentioned here after during tuning procedures and marked 1 Make 1 1 1 3 preparations 2 Set MODE SWITCH...

Страница 8: ...EN TRIANGLE MARK on the meter 3 GENERATOR UNIT ALIGNMENT 3 1 Test Equipment Required 1 RF voltage Meter 2 AF milli volt Meter mV 3 Audio Generator AG 4 Frequency Counter 5 Oscilloscope 3 2 Preparation...

Страница 9: ...place after completion of OUTPUT METER adjustment 5 1 5 2 2 Obtain maximum output at 14 2 MHz 3 Set MODE SWITCH to USB 4 Connect RF meter to antenna jack 5 Make sure that MIC GAIN CONTROL is set full...

Страница 10: ...H to ALC 3 Turn CARRIER CONTROL knob fully clockwise 4 Set STANDBY SWITCH to MANU 5 Adjust each coil in chart 4 2 1 B to get the maximum meter reading 6 Return CARRIER CONTROL counterclockwise so as t...

Страница 11: ...R08 on the rear panel so that the IK reading shows 200 mA 6 FEEDBACK NEUTRALIZING 6 1 Test Equipment Required 1 RF voltage Meter RF VTVM 6 2 Adjustment Procedures 1 Obtain maximum output at 21 2 MHz...

Страница 12: ...8 2V 0 2V of meter readings 2 6V DC Power Source Connect the meter to Pin 5 of J651 and check that the meter reading indicates within 5 5 6 5V This process should be made after completion of 1 as men...

Страница 13: ...n dail nd set it to 00 KHz toward 90 kHz 100 kHz then adjust L702 to get 9 038 kHz counter reading 5 Then turn the dial to 00 kHz toward 10 kHz and adjust trimmer C707 to get 9 138 kHz counter reading...

Страница 14: ...L801 so as to get 16 000 MHz counter readings CAUTION Don t use magnetized tools when adjusting PLL unit because magnetization of VCO coil core may make C N of oscillation output worse extremely 2 3...

Страница 15: ...C117 7 0 L103 29 025 C118 14 0 L104 36 025 C119 21 0 L105 43 025 C120 28 0 L106 50 025 C121 28 5 L107 50 525 C122 29 0 L108 51 025 C123 29 5 L109 51 525 C124 27 0 L110 49 025 C125 3 3 Xtal Oscillator...

Страница 16: ...3 5 1 C so as to get the assigned wave from on oscilloscope 3 5 1 B respectively 3 After completion of these adjustments remove sweep generator and oscilloscope Then connect RF voltage meter to Pin 1...

Страница 17: ...118 119 120 Q 201 202 203 204 Q 251 Q 351 352 353 354 355 356 357 357 2SC735Y 2SC784R 2SC372Y 2SC372Y 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC784R 2SC380Y 3SK35BL 2SK19GR 2SC380Y 2SC380Y 2S...

Страница 18: ...3 9 8 3 5 7 9 0 1 5 12 0 5 9 3 3 2 5 7 4 6 7 6 6 7 5 8 7 8 7 6 4 12 0 11 1 11 1 9 5 8 2 4 2 4 5 4 8 4 3 1 0 0 4 7 5 0 0 7 0 0 2 0 0 2 3 1 8 1 2 3 2 3 3 2 7 2 1 6 4 5 8 3 2 11 8 9 5 8 9 3 2 6 7 0 0 1 4...

Страница 19: ...08 809 2SC1682 2SC373 2SC373 2SK19 2SK19 3SK35 2SK19 1 2 V 0 7 0 0 5 0 8 0 9 0 8 1 7 V 1 2 0 7 5 0 V 3 3 3 3 3 2 4 2 8 8 8 7 Measurement by DIGITAL VOLTMETER RF VOLTAGE B or G1 G2 C or D Q 806 807 808...

Страница 20: ...UNIDEN 2020 Sid 20 26 0 1 uS DIV 0 1 uS DIV 5 uS DIV 5 uS DIV 0 5 uS DIV 0 5 uS DIV 1 A 1 B 1 A 1 C 1 D 1 D 1 C...

Страница 21: ...UNIDEN 2020 Sid 24 26 PLL Unit PC 086 Operation Unit PC 085...

Страница 22: ...UNIDEN 2020 Sid 21 26 1 E 1 F 1 G 1 H 1 H...

Страница 23: ...UNIDEN 2020 Sid 22 26 5 uS DIV 0 1 uS DIV 0 1 mS DIV 5 uS DIV 0 1 mS DIV 1 I 1 I 1 J 1 J 1 K...

Страница 24: ...UNIDEN 2020 Sid 23 26 2 C 2 B 2 D 2 A 2 D 20 Us DIV 0 1 Us DIV 1 Us DIV 0 1 Us DIV 20 Us DIV 20 Us DIV...

Страница 25: ...UNIDEN 2020 Sid 25 26...

Страница 26: ...UNIDEN 2020 Sid 26 26...

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