Kirisun PT8000, Руководство по обслуживанию

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PT8000 Service Manual
15
SQL9
RF OUT: -114dBm
SQL1
RF OUT: -121dBm
mode on after
adjustment
Table 7.5 Transmitter Section
Item Test Condition Test Equipment
Measurement
Terminal
Adjustment
Parts
Requirement Remark
Tx frequency
Frequency counter
/ General test set
Tuning mode Within ± 100Hz
DCS waveform
(balance)
Oscilloscope /
General test set
VR1
Smooth and similar to
square wave
Power
Power meter /
General test set
Ammeter
Tuning mode Adjust to 22W/5W
Max. modulation
DEV
CH: Tx low freq
point
AG:
1kHz/120mV
VR2
Adjust to ±
4.2kHz/2.1kHz
DTMF DEV Tuning mode
Adjust to
±3.5kHz/1.7kHz
± 200Hz
CTCSS DEV CTCSS: 67Hz
CTCSS DEV
CTCSS:
151.4Hz
CTCSS DEV
CTCSS:
254.1Hz
DCS DEV DCS: 023N
Deviation meter /
General test set
Antenna
Tuning mode
Adjust to ±
0.75kHz/0.35kHz
± 50Hz
Chapter 8 Specifications
8.1 General Specifications
Product Model PT8000
(136-174)MHz (400-450)MHz
Frequency
(438-490)MHz (350-400)MHz
Type of Modulation 16K Ф F3E/11K Ф F3E
Number of Channels 8
Channel Spacing 25kHz/12.5kHz
IF 1
st
IF: 49.95MHz; 2
nd
IF: 450kHz
Operating Voltage 13.8V, negative terminal grounded
Operating Temperature -25 ℃ ~ +55 ℃
Antenna Impedance 50 Ω
MIC Impedance 2.2k Ω
150mm*53mm*130mm (radio only) Dimension
165mm*62mm*130mm (with mounting bracket)
1030g (radio only)
Weight
1310g (with mounting bracket)
8.2 Rx Part
Usable Sensitivity (12dB SINAD) ≤ -118dBm
Squelch On Sensitivity ≤ -121dBm @ SQL1
Rx Residual Output W: ≤ -45dB/N: ≤ -40dB
Modulation Rx Bandwidth W: ± 7kHz/N: ± 3.5kHz
Adjacent Channel Selectivity W: ≥ 70dB/N: ≥ 60dB
Intermodulation Rejection ≥ 65dB
Spurious Response Rejection ≥ 70dB
Audio Output Power 4W, balanced @ distortion ≤ 5%, 8 Ω
Rx Current Consumption ≤ 1A
Standby Current ≤ 100mA
8.3 Tx Part
Tx Power 20W/5W @ 13.8V DC
Frequency Stability ≤ ± 2.5ppm
Max. Modulation Deviation ± 5kHz / ± 2.5kHz
Modulation Distortion (300-3000Hz) ≤ 3%
Adjacent Channel Tx Power W: ≥ 70dB/ N ≥ 60dB
Spurious Emission ≥ 70dB
Residual FM W: ≤ -45dB/N: ≤ -40dB
Tx Current Consumption ≤ 7A @ 13.8V DC
Chapter 9 Troubleshooting
No. Problem Causes and Solutions
1 Power on
Failure
A. The power cable is not reliably connected with the
accumulator or the radio, please reconnect it.
B. The fuse of the power cable is burnt out. Please
change it.
C. The power button is in poor contact. Please change
the rubber key or change the key PCB.
D. The accumulator is out of power. Please charge it
or change a new one.