3-25 
3.9  CONNECTING TO THE GYRO AND 
ELECTROMAGNETIC LOG (NSK UNIT 
SETTING) (OPTION) 
 
 
Connect a gyro equipment or equivalent that provide a below turn rate, otherwise the performance of 
signal process and target tracking decrease.   
 
  Standard craft  12 deg/sec 
  High speed craft  20 deg/sec 
 
 
To connect the gyro and the electromagnetic log, use the NSK unit NCT-4106A that is available as an 
option. Although the NSK unit has been properly adjusted before shipment, be sure to conduct the 
following setting and adjustment after installing the unit. 
 
1)  Installing the NSK unit 
To connect the gyro and the electromagnetic log, use the NSK unit NCT-4106A that is available as an 
option. 
Use the dedicated cable of JRC, CFQ-6998, which is included in the package, for the connection. 
This cable enables easy connection between the NCT-4106A and the processing unit. 
The NCT-4106A includes a large-capacity external buzzer contact output (dry contact output) interface 
circuit to operate a large buzzer directly. 
 
When CFQ-6998 (an enclosed cable) is used. 
 
1.1)  Connecting the NSK unit 
 
 
Photograph 1 
Insert the 8-pin connector (NSK) 
of CFQ-6998 (unit dedicated 
connection cable that is enclosed 
by the NCT-4106A) to the 
connector of NCT 4106A.