Uniden UM425 VHF DSC 사용자 설명서

This radio supports NMEA0183 version 3.01.

If you have difficulty getting the UM425 to receive data from your GPS receiver, 

check the device’s configuration. It should be set to the parameters shown in the 

table below.

Baud rate

4800 bps

Data bits

8

Parity

None

Stop bits

1

Data amplitude

Over 3.0 V

Drive capability

Over 10 mA

The radio supports RMC, GLL, GNS, 

GGA and ZDA sentences. When 

these sentences are received, the 

radio displays latitude/longitude, 

date, time, course, and speed. If 

any sentence except an RMC or 

GLL sentence is received, the radio 

uses the information based on the 

following priority order.

•  Status:RMC > GLL > GNS > GGA  
•  Latitude/Longitude:RMC > GLL > GNS > GGA 
•  UTC Time: RMC > GLL > GNS > GGA > ZDA
•  Date: RMC > ZDA
•  Speed / Course:RMC

•  If the radio receives only a GLL sentence, the radio does not display the 

current speed, course, and date. 

•  If the radio receives both RMC and GLL sentences, the radio uses only 

the RMC sentence.

•  Status data is used to check whether the GPS data is valid or invalid.

When the radio receives a DSC call (Distress, Position Reply, or Position 

Send), it outputs a DSC/DSE sentence from the NMEA output port. 

NOTE: When the radio receives a distress call, it outputs a sentence in the 

following format.
•  $CDDSC,12,3081234000,,07,00,0354013946,0657,,,S,E*6D
•  $CDDSE,1,1,A,3081234000,00,60875646*13

UM425 VHF OM.indd   63

28/9/11   11:55:23 AM