Kirisun PT7200-01, Руководство по обслуживанию

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6 . Intermediation rejection >=65dB(wideband) (narrowband)
7 . Parasitic suppression >=70Db
8 . Signal-to-Noise Ratio >=40dB(wideband) / >=35dB
(narrowband)
9 . Squelch off: off when signal source level = -/
-3 dBm (level-1 squelch )
10. Squelch on: on when signal source level = -123dBm
+/-3 dBm (level-1 squelch )
7.3. Transmitter
1 .output power High power (3.8W---4.6W)
Low power (0.8W---1.5W)
Hi, Med, Low frequency points, MOD:1kHz, DEV:+/-3kHz.
Red light on when transmitting.
2 .Transmitting current High power <= 1.8A low power <=1.1A
3 .Max. frequency deviation
3.9kHz---4.6kHz (wideband)
3.2kHz---3.9kHz (median band)
1.8kHz---2.4kHz (narrowband)
MOD:1kHz/120mv
4 .Modulation Sensitivity
(mic input1kHz/19mv
2.2---3.8kHz(wideband)
1.2---1.8kHz(narrowband)
5 .Transmitting distortion
MOD: 1kHz, DEV: 3kHz < 3%
MOD: 0.3kHz, DEV: 3kHz < 10%
MOD: 0.4kHz, DEV: 3kHz < 5%
MOD: 0.5kHz, DEV: 3kHz < 5%
MOD: 0.6kHz, DEV: 3kHz < 5%
MOD: 0.8kHz, DEV: 3kHz < 5%
MOD: 1.5kHz, DEV: 3kHz < 5%
MOD: 2.0kHz, DEV: 3kHz < 5%
MOD: 2.5kHz, DEV: 3kHz < 5%
MOD: 1kHz/120mv < 15%
6 .CTCSS frequency deviation
0.50kHz---0.85kHz (wideband)
0.50kHz ---0.65kHz (median band)
0.25kHz--0.50kHz (narrowband)
The waveform shall be good.
7 .DCTCSS frequency deviation
0.70kHz ---1.10kHz (wideband)
0.60kHz ---0.85kHz (median band)
0.25kHz---0.50kHz (narrowband)
The waveform shall be good.
8 .DTMF TONE FSK 5T/2T frequency deviation
3.2---4.0 kHz(wideband)
3.0kHz---3.6kHz (median band)
1.6---2.4 kHz (narrowband)
9 .Transmitting frequency deviation
nominal fre/-200Hz
10 .modulation feature (relative to 6dB/ octave deviation)
+3dB / -3dB
11 .Transmitting harmonic suppression >=70dB
12 .Signal-to-Noise Ratio >=40dB(wideband) / >=
35dB(narrowband)
13 .Frequency stability +/- 2.5ppm
14 .Under voltage indication
Set the voltage at 6.8V, press the ptt key and the red light
Hould flash and no transmitting power .
15 .Starting time of transmitting should be =55ms
Voltage for aforesaid tests: 7.5V +/-0.1V in room temperature
Frequency range:136MHz-174MHz 350MHz--400MHz
400MHz--470MHz 450MHz--520MHz
1 . Sensitivity <= -116dBm (0.35uV) (wideband) (narrowband)
Hi, Med, Low frequency points 14dB SINAD
MOD:1kHz, DEV:+/-3kHz (wideband)
+/-1.5kHz(narrowband)
2 . Distortion half audio power <= 8%
Max audio power <= 20%
16ÙSpeaker, BTL output, 1000mW audio power .
MOD:1kHz, DEV:+/-3kHz (wideband)
+/-1.5kHz(narrowband)
3 . Current
a. Static current <= 85 mA
Volume at the min. value, squelch off.
b.1000mW audio power, current <= 500 mA
4 . Audio correspondence (relative to 6dB/octave deviation) +
2dB / -6dB
5 . Adjacent-channel selectivity >=70dB
(Wideband) / >=60dB(narrowband)
Chapter 8 Troubleshooting
No.
1
2
3
4
Cause and Solutions
A. Battery power may be insufficient. Recharge
or change the battery pack.
B. The power switch is broken, please change it.
C. The CPU is broken, please change it.
D. Turned off remotely, reprogramming is
required.
A. The PLL crystal oscillator X4 is broken,
please change it.
B. The oscillating tube is broken, and please
change it.
C. Phase-locked loop chip IC9 is broken please
change it.
A. Make sure the two communication radios are
using the channel of the same frequency.
B. Make sure the CTCSS/DCS tone is the same
as that of your group members.
C. Out of the effective communication range.
A. The antenna is not well connected, please
screw the antenna again until secure.
B. The high frequency amplification tube Q81 is
broken, please change it.
C. The squelch level is too high and the squelch
cannot be activated. Reset the squelch level
with a computer.
D. Mixer tube Q79 is broken, and please change
it.
E. MF processing chip U9 is broken, please
change it.
PT7200 SERVICE MANUAL
Problem
Power on
failnre
Phase-locked
loop is
unlocked
(Beep sounds)
Cannot talk
to or hear
other group
Cannot
receive
Signals.
12