Argus Radar - INSTALLATION AND SETTINGS
988-10187-004 1.10
1.6 Serial Gyro
A Standard or Fast NMEA Gyro can be connected to the Alpha PCB TB9
Connect it according to guidelines defined in Chapter 2 Serial Interfaces.
1.7 Speed LOG
Speed log with analogue signal is connected to TB14 on the Alpha PCB. There
are several connections depending on the type of log installed. Most single axis
analogue speed logs are shorting-type (relay contact closure), in this case the
signal shall be connected between PIT and GND on TB14.
Speed log with NMEA output can be connected to Alpha PCB input TB2. See
the serial interface chapter for accepted sentences.
WARNING
THE HEADING SENSOR, A GYRO EQUIPMENT OR EQUIVALENT, SHOULD
BE ABLE TO SUSTAIN A RATE OF TURN UP TO 20°/S ACCORDING TO
IMO RESOLUTION MSC.192(79) AND MSC.116(73) FOR THD DEVICES.
IF THE INTERFACE IS ANALOGUE THE MINIMUM TURN RATE SHOULD
BE 12°/S.
FOR A DIGITAL INTERFACE THE HEADING REFRESH SHOULD BE MORE
THAN 20 HZ, UP TO 50 HZ.
IF THE GYRO UPDATE RATE IS UNDER THE PREVIOUS STATED VALUES
THE TRACKING PERFORMANCE CAN BE SERIOUSLY DEGRADED WITH
INCREASING ERRORS ON TARGET VECTOR DURING THE OWN SHIP
CHANGE OF COURSE.
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