Uniden UM425 VHF DSC 사용자 설명서

To operate correctly, your UM425 requires two electrical connections:

• 

providing it with power from the boat’s electrical system 

• 

connecting a VHF-FM marine antenna to the antenna connector

Nominal 13.8 VDC power supply with 

a negative ground (10.8 VDC to 15.6 

VDC). 

Power leads should be kept as short 

as possible. A direct connection to the 

power supply is ideal.

Minimum of #14 AWG copper wire for 

extensions up to 6m, 12 AWG wire for 

extensions from 6m to 10m, or 10 AWG 

wire for extensions from 10 to 18m

Male PL-259 connector

50 Ω impedance

Minimum 1.2m, 3 dB rated antenna for 

sailboats or 2.4m, 6dB rated antenna for 

powerboats 

Minimum RG-58 lead-in wire for antenna 

leads up to 6m to 10m, RG-8X for an-

tenna leads from 6m to 10m, or RG-8U 

for antenna leads from 10m to 18m.

13.8V DC

Power 

cable

Power 

connector

Black wire 

(-)

Red wire 

(+)

UM425 VHF OM.indd   43

28/9/11   11:55:21 AM