NM-251D-ZDA
ZDA Filter/Converter
User Guide
V1.00
Introduction
The NM-251D-ZDA is a part of the NM-251 Series family and is programmed to function as a GPS signal
filter/converter that produces the $GPZDA sentence from any GPS capable of transmitting the $GPRMC string. The
NM-251D-ZDA is designed to be used for interfacing a GPS that does not transmit the $GPZDA sentence with systems
such as the VDR or ECDIS that require the time and date to be processed from the $GPZDA string only. The produced
$GPZDA sentence is appended to the rest of the transmitted GPS strings and distributed to each of the five buffered
output ports.
Operation
The NM-251D-ZDA acquires the NMEA-0183 sentences from the first input port only. If the string is not the
$GPRMC it is immediately transmitted to the five outputs ports. In the case that a $GPRMC sentence is received the
NM-251D-ZDA processes the time and date data and produces the $GPZDA string. Both the $GPRMC and $GPZDA are
then transmitted to the five buffered outputs. If no $GPRMC sentence is received the NM-251D-ZDA functions as a
pass through one to five channel NMEA-0183 multiplier.
nuova marea ltd
marine electronics & deign
26, Myrtidiotissis str. Kastella 185-33 Piraeus Greece
Tel +30 210 4134628 & +30 210 4134698 Fax +30 210 4134814
