63
Specifications
NMEA Operation
NMEA Input
If you have difficulty getting the UM455 to receive data from your GPS receiver,
check the device’s configuration. It should be set to the parameters shown in the
table below.
Table 12 - NMEA Input Parameters
Baud rate
4800 bps
Data bits
8
Parity
None
Stop bits
1
Data amplitude
Over 2.0 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
NOTES :
•
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.
NMEA Output
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
Table 11 - Canadian Channel Frequencies and Channel Tag
(cont'd)
This radio supports NMEA0183 version 4.10.