Kenwood UBZ-LJ8 Service Manual page 19

PLL Section
Item Condition
1. VCO lock voltage 1) 4CH : 446.04375MHz
RX
TX 2) 4CH : 446.04375MHz
PTT : ON
2. Reference 1) 4CH : 446.04375MHz
oscillator PTT : ON
frequency
Transmitter Section
Item Condition
1. TX power 1) 1CH : 446.00625MHz
and current PTT : ON
2. MAX 1) 1CH : 446.00625MHz
deviation AG : 1kHz/100mV
PTT : ON
3. MIC 1) 1CH : 446.00625MHz
sensitivity AG : 1kHz/5mV
PTT : ON
4. CTCSS 1) Enter the adjustment mode,
deviation then write the CTCSS
deviation level.
1CH : 446.00625MHz
Tone No. : 24 (151.4Hz)
PTT : ON
2) Tone No. : 38 (250.3Hz)
PTT : ON
Receiver Section
Item Condition
1. Quad-coil 1) 4CH : 446.04375MHz
adjustment SSG output : –53dBm (501µV)
SSG MOD : 1kHz
SSG DEV : 1.5kHz
AF VOL : 10 o'clock position
2. Sensitivity 1) 4CH : 446.04375MHz
SSG output : –115dBm (0.398µV)
SSG MOD : 1kHz
SSG DEV : 1.5kHz
AF VOL : 0.63V/8Ω
CCITT filter : ON
3. Squelch 1) 4CH : 446.04375MHz
SSG output : –116dBm (0.35µV)
2) SSG output : –127dBm (0.1µV) Oscilloscope TX-RX SP
4. BATT 1) BATT terminal
: DC 3.35V± 0.01V
2) BATT terminal
: DC 3.80V± 0.01V
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
DVM TX-RX LV
(B/2)
Power meter TX-RX ANT TX-RX VR3
f. counter (B/2) (B/2)
Measurement
Test-
Unit Terminal Unit
equipment
Power meter TX-RX ANT TX-RX VR4
Ammeter (B/2) (B/2)
Power meter TX-RX ANT
Linear (B/2)
detector TX-RX MIC
(A/2)
AG
AF V.M
Linear TX-RX ANT
detector (B/2)
Measurement
Test-
Unit Terminal Unit
equipment
SSG TX-RX ANT TX-RX L36
(B/2) (B/2)
Oscilloscope TX-RX SP
DVM (A/2)
SSG TX-RX ANT
(B/2)
Distortion TX-RX SP
meter (A/2)
Oscilloscope
AF V.M
SSG TX-RX ANT
(B/2)
AF V.M (A/2)
DC power TX-RX VCC (+)
supply (A/2) GND (–)
DVM
UBZ-LJ8
Adjustment
Parts Method
Check 0.7~2.7V
± 100Hz
446.04375MHz
Adjustment
Parts Method
± 10mW
500mW
Current check 500mA or less
± 0.05kHz
VR1 2.0kHz
According to the
larger +, –.
Check 1.2~1.9kHz
[UP], Write the new 0.35kHz± 0.05kHz
[DOWN] adjustment value
by pushing [PTT].
Check 0.25~0.40kHz
Adjustment
Parts Method
Maximum AC level 0.9V or more
(peak to peak) using
oscilloscope
Check SINAD : 20dB or more
Check Squelch open
Squelch close
LCD check
Specifications/Remarks
Specifications/Remarks
Specifications/Remarks
or light on
or lignt on
19