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JMA-9100/7100 Installation Manual > 3.INSTALLATION OF DISPLAY UNIT > 3.7 CONNECTION WITH GYRO (IEC61162-1/2)
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3.7
CONNECTION WITH GYRO
(IEC61162-1/2)
The HDM,HDG,HDT and the THS sentence of IEC-61162-1/2 can be received.
The baud rate conforms to 4800/38400 bps.
Connection should be made to TB4501(HDGRX+,HDGRX-) of terminal board
circuit CQD-2097 located in the display unit (processing unit). See Fig 3-
23:Arrangement in TB4501.
The bearing signal take from NMEA input, select the heading device to "CMPS".
The gyro interface circuit can be used to interface NMEA to JRC format output
that to make correct setting by referring to Section 4.1.2 NMEA Input setting.
When the heading signal take from gyro interface circuit, select the heading
device to "GYRO".
To make sure the appropriate setting, the heading device selection that are
"CMPS" or "GYRO" are both available. Using the gyro interface circuit, there is a
limitation of update interval. (Refer to Section 4.1.2 NMEA Input setting) If
update interval exceed 60ms, the "GYRO I/F (GYRO)" alarm is displayed on the
screen, because of the above precaution.
The true bearing update frequency
greatly influences the radar signal
processing performance and the target
tracking performance. It is recommended that
the signal output from the heading sensor be
updated within time intervals of 50 ms or less.