Simrad HS52, Instruction Manual

Page: 32 / 80

Simrad HS52 GPS compass and DGPS navigator
24
20222360 / E
is possible to output 1PPS time tag messages from HS52. This
message is the
ZDA 1 Hz format and is selectable as output
format in the Data Output 1 and 2 menu.
Select 1PPS as clock data format in the General setup menu to
activate 1PPS signal output on the P208 connector. The signal
will then be available on the AD10_D pin with the ground
reference on the GND_D pin.
ZDA 1 Hz Message
This 1PPS time tag message is output once per second,
approximately 0.5 seconds before the time pulse. The message
format is ASCII text using the ZDA message defined in
NMEA
0183 Standard for interfacing marine electronic devices ,
Version 2.3. The message contains the UTC time when the
message is output. The next time pulse appears at the first
integer second after the time in the message.
Format: $INZDA, time , day , month , year ,* csum term
Explanation:
time
UTC time on format hhmmss.ss
where hh is hours (00 - 23), mm is minutes (00 - 59)
and ss.ss is seconds (00.00 - 59.99).
day Day of month (01 - 31).
month Month of year (01 - 12).
year
Year on format yyyy.
csum Checksum (exclusive or) of all characters between,
but not including, the preceding
$ and * , hexadecimal (00 - FF).
term CR-LF (two bytes, values 13 and 10).
This format is recommended used together with 1PPS signal
output on the terminal block P208 on the Processing Unit. This
since the message is output synchronized with the 1PPS signal
and is easier/faster to decode than the standard NMEA output
with a number of NMEA messages included.