规格：
model jhs-770s jhs-780d
gmdss compliance 
general communication mode simplex/semi-duplexsimplex/duplex
frequency range 155.00 - 163.50mhz 
tx 155.00 - 163.50mhz (simplex/semi-duplex), 156.00
- 157.45mhz (duplex) 
rx 155.00 - 163.50mhz (simplex/semi-duplex), 160.60
- 162.05mhz (duplex) 
output power 25w/1w 
modulation type radiotelephone g3e/f3e, dsc/atis
g2b/f2b 
channel spacing 25khz 
frequency accuracy within ±10x10-6
antenna impedance 50ω unbalanced
dsc ch70 receiver built in
dsc ch70 frequency 156.525mhz
dsc received message log 20 distress messages
20(tx)+20(rx) non-distress messages
channel capacity itu/usa/canada 57 channels max
inland waterway 57 channels max
private 200 channels max (channel steps: 25khz,
12.5khz, 10khz)
weather 10 channels max
memory 10 channels max
inputs iec-61162-1 gps
iec-61162-2 ais
outputs iec-61162-1 vdr/s-vdr 
audio 600ω 0dbm balanced (to vdr/s-vdr),
unbalanced (to ext. loudspeaker)
rs232c for external printer nkg-91 and dpu-414
environmental conditions power voltage dc 24v +30%
-10%
current consumption dc 24v input, 8.3a max
ambient condition temperature: -15°c +55°c (range
for full performance 0°c +40°c)
optional items power supply unit nbd-865 (for ac
operation) 
remote vhf controller ncm-1770(with handset, cradle
and cable) 
vhf channel selector ncm-2000 
controller connection box nqd-2770 
flush mounting kit mpbc42957(for ncm-1770) 
controller bracket mpbx44354 
handset nqw-261 (with cradle) 
handset connection box nqe-1847 
handset connection box (waterproof) nqe-1845(flush
mount) / nqe-1846(wall mount) 
printer (table mount) dpu-414 
printer (flush mount) nkg-91 
external speaker (wall mount) nvs-423 
external speaker (flush mount) nvs-423a 
extension board cqd-7701 (required for multiple
controllers)

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