Check Of The Performance Monitor (Mon Display) - JRC JMA-9172-SA Instruction Manual

JMA-9172-SA Instruction Manual
8.3.1.4

Check of the Performance Monitor (MON Display)

The radar system is equipped with an interswitch.
For checking the performance unit, set the interswitch connection to
straight, i.e. No.1 scanner is connected to No.1 display unit as the Master.
Procedures
1) Perform the following menu open procedure to open the "4.
MON Display menu".
Blind sector appears on stern direction of ship to check receiver performance.
Range sca le will be automatically changed to 24nm.
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Sea and Rain dial will be automatically changed to minimum, a nd IR, ENH, PROC and FUNC
will be automatically c hanged to off. Push "EXIT" button, it will be returned to former state .
Check the Transmitter System ATT Value and Receiver System
2)
ATT Value.
If Transmitter System ATT Value down > 7.0dB or Receiver System ATT Value down > 3.0dB,
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Please consult the purchased distributor or nearest branch office (or our sales department).
Note: Features of Performance monitor of JMA-9172-SA radar
-The performance of the receiver and the transmitter is automatically calculated and indicated on
the radar screen like XX.X dB in two or three-digit value.
-Receiver check is performed within the PM sector in direction of stern of ship.
Therefore, even if the performance monitor is activated, the performance monitor pattern echo like
the performance monitor of the magnetron radar is not displayed at all.
As a result, the radar operator can clearly observe the echo around ships other than the direction of
the stern.
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8.COUNTERMEASURE FOR TROUBLE ...
9. Test Menu
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8－ 9
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8.3 PERFORMANCE CHECK
4. MON Display
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