J Communications Co ATT704 Users Manual
1. GENERAL INFORMATION
1.1 GENERAL
This equipment, ATT704 is called 2 way portable handheld radios.
The frequency range is 462.5625467.7125MHz,UHF operating Channel
For international 2 way portable radios.
1.2 CHARACTERISTIC
a) All active device in this radio is composed of semiconductor and
high density IC.
b) To design this radio in compact and weight approximately 140g
including battery.
C) CPU of this equipment is UPD70F3017A from NEC.
d) It's power can operate by use of Alcaline 4 cell(1.5V AA) battery
1.3 COMPOSITION
This radio is composed of following.
a) Transmitter
b) Receiver(GMRS/FRS + GPS + NOAA)
c) Helical(GMRS/FRS/NOAA) & PATCH(GPS) Antenna
d) Belt clip
2. SPECIFICATION
2.1 GENERAL SPECIFICATIONS
a) Frequency Range : 462.5625 467.7125 MHz
b) Output Impedance : 50Unbalanced
c) Modulation Type : 8K50F3E
d) Communication Mode : Simplex
e) Channel Capacity : 22 channel
f) Channel spacing : 12.5 KHz
g) Power : 6.0V(ALCA 1.5V X 4 AA )
h) Battery Life : ALCA. 2000mAh > about 18hour
NI-MH 600mAh > about 11hour
(Tx:800mA) 5% , (Rx:150mA) 5% , (Stand-by 10mA) 90%
GPS ON : ALCA 2000mAh > 9hours(Tx 5%, Rx 5%, Stand-by 90%)
GPS OFF : ALCA 2000mAh > 16hours(Tx 5%, Rx 5%, Stand-by 90%)
i) Operating Temperature : -30+5 0
j) Dimension : 214(H) x 67(W) x 48.5(D)mm
k) Weight : 299g(with Battery)
2.2 ELECTRICAL SPECIFICATION
a) TRANSMITTER
1) Output power : Max. 2.0W(GMRS)/0.5W(FRS)
2) Frequency Stability : 5ppm(-30- 20 )/2.5ppm (-20+ 60 )
3) Modulation Method : FM
4) Oscillation Method : PLL SYNTHESIZER
5) Max. Frequency Deviation : < 2.5KHz(with tone)
6) Cooling Method : air-cooling Method
7) Conducted Spurious Emission : < -13dBm
8) Radiation Spurious Emission(3m) : < -48dBm
9) FM Hum/Noise : > 40dB(1kHz 60% modulation)
10) Distortion : < 5% (1kHz 60% modulation)
11) Tx Audio Response : 6dB /OCT 3dB PRE-EMPHASIS(300Hz2.5kHz)
b) RECEIVER
1) Receive Method : Double Super Heterodyne
2) Receive Sensitivity : less than -120dBm(12dB SINAD)
3) NOAA Sensitivity : less than –115dBm(12dB SINAD)
4) Squelch Sensitivity : -120dBm -130dBm(Audio On/Off Point)
5) Bandwidth : > 8kHz(6dB ATT Point)
6) Adjacent channel rejection : < -60dB(12.5kHz)
7) Local Frequency Stability : 5ppm(-20 +60 )
8) Spurious Response : > 50dB
9) Audio output : 200mW(Internal 8 load THD 10%) EXt 100mW
10) Distor tion : < 5% (1kHz 60% Modulation)
11) RX Audio Response : 6dB/OCT +1/-10dB DE -EMPHASIS(300Hz2.5kHz)
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