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UHF ALIGNMENT
ALIGNMENT OF TRANSMITTER - (UHF)
TEST EQUIPMENT REQUIRED
a.
DC POWER SUPPLY (7.5V, more than 3A)
b.
RF WATTMETER (more than 10 Watt)
c.
DUMMY LOAD FOR SPEAKER (50
Ω
more than 10 Watt)
d.
FM LINEAR DETECTOR
e.
FREQUENCY COUNTER
f.
AF OSCILLATOR
ALIGNMENT CONDITION
a.
CHANNEL
: 1
b.
MODE
: TX
c.
MODULATION FREQUENCY
: 1 kHz
d.
LOAD IMPEDANCE
: 50
Ω
ALIGNMENT PROCEDURE
See Figure 2 for setup of test equipment.
STEP
TEST CONDITION
MEASUREMENT
ADJUSTMENT
REMARKS
1
NO MODULATION
RF WATTMETER
RT501
3.8W
±
0.05W *
2
FREQUENCY
COUNTER
CT301
461.000 MHz
±
100 Hz
3
MOD : 1 kHz
LEVEL : 100 mV
FM LINEAR
DETECTOR
HPF: OFF
LPF: OFF
DE-EMPHASIS: OFF
RT202
±
4.0 kHz DEV
±
0.01 kHz
4
CH6
NO MODULATION
↑
RT701
±
700 Hz DEV
±
10 Hz
(Tone Freq. = 67.0 Hz)
5
CH7
↑
RT201
±
700 Hz DEV
±
10 Hz
(Tone Freq. = 250.3 Hz)
6
CH6
↑
---------
If DEVIATION is not
±
700 Hz DEV
±
30 Hz back to STEP 5.
7
CH1
MOD : 1 kHz, 100 mV
↑
RT202
(CHECK)
±
4.0 kHz DEV
±
0.05 kHz
8
CH4
NO MODULATION
↑
RT701
(CHECK)
±
700 Hz DEV
±
30 Hz
(Tone Freq. = 167.9 Hz)
*
POWER ADJUSTMENT TIME IS LESS THAN 5 SECONDS.
ALIGNMENT OF RECEIVER - (UHF)
TEST EQUIPMENT REQUIRED
a.
DC POWER SUPPLY (7.5V, more than 2A)
b.
RF SIGNAL GENERATOR
c.
DUMMY LOAD FOR SPEAKER (8
Ω
, more than 1 Watt)
d.
SINAD METER
e.
AF OSCILLATOR
ALIGNMENT CONDITION
a.
CHANNEL
: 2
b.
MODE
: RX
c.
SQUELCH (RT001 : SQ. VR)
: C.C.W.
d.
RF SSG MODULATION
: 1 kHz,
±
3 kHz DEV.
e.
RF SSG FREQUENCY
: 438.05 MHz
f.
AUDIO SIGNAL OUTPUT LEVEL
: 50 mW (0.63 Vrms)
(AT SPEAKER TERMINAL)
ALIGNMENT PROCEDURE
See Figure 3 for setup of test equipment.
STEP
TEST CONDITION
MEASUREMENT
ADJUSTMENT
REMARKS
1
RF SSG
LEVEL :0.15 uV
OSCILLOSCOPE
(AUDIO OUTPUT)
RT001
ADJUST RT001 TO THE POINT
WHERE AUDIO OUTPUT WAVE-
FORM WILL APPEAR
2
CHANNEL: 4
RF SSG
LEVEL: 1 mV
MOD: 167.90 Hz
DEV:
±
700 Hz
TP601
RT601
ADJUST RT601 TO
0.9Vp-p
0.9Vp-p
AE/LZB 119 1658 R1A
11
Содержание KRD 103 117/1
Страница 23: ...ASSEMBLIES MAIN BOARD VHF BOTTOM VIEW E23 12263 Rev 1 E22 12264 Rev 1 AE LZB 119 1658 R1A 22...
Страница 24: ...ASSEMBLIES MAIN BOARD VHF TOP VIEW E23 12263 Rev 1 E22 12264 Rev 1 AE LZB 119 1658 R1A 23...
Страница 25: ...MAIN BOARD UHF TOP VIEW E22 12167 Rev 1 E22 12166 Rev 1 ASSEMBLIES AE LZB 119 1658 R1A 24...
Страница 26: ...ASSEMBLIES MAIN BOARD UHF BOTTOM VIEW E22 12165 Rev 1 E22 12163 Rev 1 AE LZB 119 1658 R1A 25...
Страница 40: ...SCHEMATIC DIAGRAMS PLL BOARD VHF E14 4495 Rev 1 AE LZB 119 1658 R1A 39...
Страница 42: ...SCHEMATIC DIAGRAMS MAIN BOARD UHF E12 4452 Rev 0 AE LZB 119 1658 R1A 41...
Страница 43: ...SCHEMATIC DIAGRAMS MAIN BOARD VHF E12 4492 Rev 0 AE LZB 119 1658 R1A 42...
Страница 44: ...SCHEMATIC DIAGRAMS SUB BOARD UHF E13 4451 Rev 1 AE LZB 119 1658 R1A 43...
Страница 45: ...SCHEMATIC DIAGRAMS SUB BOARD VHF E13 4497 Rev 1 AE LZB 119 1658 R1A 44...
Страница 50: ...WIRING DIAGRAMS UHF E33 3698 Rev 1 AE LZB 119 1658 R1A 49...
Страница 51: ...WIRING DIAGRAMS UHF SYNTHESIZER E33 3697 Rev 1 AE LZB 119 1658 R1A 50...
Страница 52: ...WIRING DIAGRAMS VHF E33 3712 Rev 1 AE LZB 119 1658 R1A 51...
Страница 53: ...WIRING DIAGRAMS VHF SYNTHESIZER E33 3711 Rev 1 AE LZB 119 1658 R1A 52...
Страница 54: ...This page intentionally left blank AE LZB 119 1658 R1A 53...