Sửa chữa Bộ đàm cầm tay Motorola MT-777

Motorola MT-777 two way radio walkie talkie handy transceiver

1.ANI CODE(PTT ID) *Option
2.Scrambler *Option
3.VHF 5W/ UHF 4W output power
4.128 memory channels
5.Built-in 50 CTCSS and 104 DCS
6.Wide (25kHz) and Narrow(12.5kHz) channel spacing programmable in separate channels
7.Come with 1200mAh Li-ion battery/1600MAH option
8.Input Frequency directly by keypad
9.VOX built-in
10.Frequency Scan & CTCSS Scan
11.Three different scan type: TO/CO/SE
12.Three color LCD backlight display
14.Programmable by PC software
16.Priority Scan Function
17.Adjust power High/Low
18.Switching between Channel/VFO
19.Display Channel+ Frequency mode.
20.Adjust squelch level (0-9)
21.Busy channel lockout
22.Keypad lock
23.Reverse Frequency Function
24.Channel step 5k,10k,6.25k,12.5k,25k
25.Program alphanumeric channels name
26.Self-program
27.Voice Annunciation
29. 136-174MHZ/400-470MHZ/240-250MHZ/450-512mhz/350-390MHZ

TECHNICAL:
Frequency Range 136―174MHz，245-246MHz，400—470MHz
Working Temperate －20℃―＋50℃
Operating Voltage DC 7.2V
Operate Mode Simplex or Semi-duplex
Dimension 100mm×55mm×32mm (Not included Antenna)
Weight 220g (Including battery)
Antenna impedance 50Ω

Transmitter
Frequency Stability ±2.5PPM
Output Power ≦5W
Max Frequency Deviation ≦5KHz
Audio Distortion ≦3%
Modulation Character +3dB—-3dB
Adjacent Channel Power ≥65dB
Spurious Radiation ≤7.5UW(-36db for CE)
Occupied Bandwidth ≤16KHz

Receiver
RF Sensitivity ＜0.2UV(12DB SINAD)
Audio Distortion ≦3%
Audio Response +2dB—-10dB
Adjacent Channel Selectivity ≥60dB
Intermodulation Rejection ≥60dB
Blocking ≥80dB