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Although each component of the radar has completely been adjusted in the factory, the
adjustments as described in following pages are required after installation.
The NSK unit of the radar can be applied to almost all types of gyrocompasses just by changing
the settings of keys (step motor type of 24 to 100VDC and synchro motor type with primary
exciting voltages of 50 to 115VAC).
Before turning the power on, follow the procedures below to set switches S1, S2 and S5, and
jumper JP1 on the NSK circuit (PC4201) to make them suitable to the type of the gyrocompass.
Since the gyro selection keys on the NSK circuit is set to the 360X synchrogyro before shipment,
adjust the keys as follows to suit it to the gyrocompass fitted on the ship. For details, see [Table:
Setting Table of Gyro Compass and Gyro Select Switches of NCT-4106].
(1) Before turning on the system, set the keys and jumper pin on the NSK unit (PC4201) as
follows:
S1 : Select switch to [OFF].
S2 : Gyrocompasses output stepper or synchro signal. So, be sure to check the type of the
gyrocompass fitted on the ship before setting S2.
Synchronizing signal ...... Set S2 to the [SYNC] position.
Stepper signal ................. Set S2 to the [STEP] position.
S5 : Set S5 to suite the applicable gyro in accordance with the S5 setting table.
S5-1 : Type
Synchronizing signal ...... [OFF]
Stepper signal ................. [ON]
S5-2, -3 : Gyro ratio
360X 180X 90X 36X
S5-2 OFF OFF ON ON
S5-3 OFF ON OFF ON
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