Specifications
9-1
9. SPECIFICATIONS
9.1 JHS-770S/780D Marine VHF radiotelephone
● General Specifications
Transmission frequency Simplex/ semi-duplex (770S) : 155.000 - 163.500MHz
Duplex
(780D) : 156.000 - 157.450MHz
Reception frequency Simplex/ semi-duplex (770S) : 155.000 - 163.500MHz
Duplex
(780D) : 160.600 - 162.050MHz
Number of channels ITU/USA/Canada/IWW channels: Maximum 57 ch
Weather channels: 9ch
Private channels: Maximum 200ch
Memory channels: Maximum 10ch
Channel spacing 25kHz
Communication modes Simplex and semi-duplex (770S) / duplex (780D) press talk
Type of emission Radiotelephone communications: F3E (G3E)
DSC/ATIS: F2B (G2B)
Antenna impedance 50 unbalanced
Transmission/reception switching
interval
Less than 300 ms
Channel switching interval Less than 5 sec
Interface IEC61162-1 (GPS/AME/RMS)
IEC61162-2 (AIS)
600 balanced (VDR), 600 imbalanced (Ext SP)
Main controls DSC call transmission (sending and receiving), communication
channel settings, transmission power settings, squelch adjustment,
volume adjustment, screen adjustment
Power supply voltage 24VDC (21.6VDC - 31.2VDC)
Current consumption 25W transmission: Maximum 8.0A
Reception: Maximum 5.0A
Operating temperature range -15°C - +55°C
Storage temperature range -15°C - +55°C
Humidity resistance No abnormality after standing 4 hours in +40ºC, 93% RH
Vibration resistance (3 Axis) 2Hz-5Hz 13.2Hz: Vibration amplitude ±1 mm ±10%
13.2Hz 100Hz: Maximum acceleration 7m/s
2
constant
No abnormality after testing shared vibration points or at 30 Hz for 2
hours
Continuous operation No abnormality after operating continuously for 8 hours
Protection rating IP22 equivalent (Controller panel)
Dimensions and mass Transceiver (mass: 770S/ 780D)
Height 290 mm, width 240 mm, depth 128 mm (excluding projecting
parts), approximately 6.3/ 6.9kg
Controller
Height 142 mm, width 230 mm, depth 89 mm (excluding projecting
parts), approximately 1.3kg
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