ADJUSTMENT
DJ-C1T/C1E
1) Settings
Power supply voltage 4.0V DC
Item
Procedure
Set to
1. Reference voltage
Tune in 144.95 MHz and set P/D voltage
to 1.7 V. (VCO case attached)
Adjust L214
1.7 +/- 0.1 V
2. Reference
Transmit on 145.05 MHz and set reference
frequency
frequency to 145.05 MHz.
Adjust TC202
145.05 MHz +/- 0.5 Hz
3. Transmission power
Transmit on 145.05 MHz and set
transmission power to 300 mW.
Adjust VR201
300 mW +/-20 mW
4. MIC modulation
Transmit on 145.05 MHz and input a
deviation
1 kHz - 50 mV Bow-frequency signal to
the MIC input pin. Then, set modulation to
4.5 kHz.
Adjust VR202
4.5 +/-0.1 kHz
2) Checks
ltem
Requirement
Factory-clearance
1. Transmission
145.05 MHz +/-200 Hz
+/- 500 Hz
frequency
2. Transmission
On 145.05 MHz transmission frequency
power
300 mW +/-30 mW
Same as on left
3. Modulation
On 145.05 MHz transmission frequency
Deviation
'With 1kHz - 50mV AF signal
4.5 kHz +/- 0.2 kHz
Same as on left
･
With 67/250.4 Hz tone frequency
0.4 ~ 1.2kHz
Same as on left
･
With 1750 Hz tone burst
(E/EA specification only)
2.4 ~ 3.6 kHz
Same as on left
4. Spurious emission
On 145.05 MHz transmission frequency
Max. -55 dB
Same as on left
5. Transmission S/N
On 145.05 MHz transmission frequency
Min. 33dB
Same as on left
(Measuring instrument's audio filter OFF
at 0.3 ~ 3 kHz)
6. Reception sensitivity
On 144.95 MHz reception frequency
FM Max. -9dBp (EMF) (12 dB SINAD)
Same as on left
On l29.95 MHz reception frequency
AM Max. 5 dBLl (EMF) (10dB S/N)
Same as on left
7. Audio (32 ohm)
･
Volume-control VR7
Distortion Max. 4%
Same as on left
･
Volume-control VR8
Output Min. 20 mW
Same as on left
8. Reception S/N
On 144.95 MHz reception frequency
Min. 40dB
Same as on left
9. Unwanted radiation
On 145.995 MHz reception frequency
-55 dB and below
Same as on left
10. Squelch
a) Squelch fuIIy opens at 0 level.
Same as on left
b) Squelch opens when receiving -8 dBp
Same as on left
reference signal at squelch level 2.
23
Summary of Contents for DJ-C1
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Page 17: ...EXPLODED VIEW 17 ...
Page 18: ...EA61 ...
Page 25: ...PC BOARD VIEW CPU Unit side A DJ C1 CPU Unit side A DJ C1 27 ...
Page 26: ...CPU Unit side A DJ C4 CPU Unit side B DJ C4 28 ...
Page 27: ...MAIN Unit side A DJ C1 29 ...
Page 28: ...MAIN Unit side B DJ C1 30 ...
Page 29: ...MAIN Unit side A DJ C4 31 ...
Page 30: ...MAIN Unit side B DJ C4 32 ...
Page 31: ...PTT Unit side A DJ C1 PTT Unit side B DJ C1 PTT Unit side A DJ C4 PTT Unit side B DJ C4 33 ...
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