16
User Manual
Fig. 1.5.4.4a - Transmission Trigger Delay tuning (II)
Once the calibration has been performed, the calibration data is retained. How-
ever if a Clear RAM operation is performed it may be necessary to repeat the
calibration.
IMPORTANT
: This tuning is already done by the factory and thus it is in general
not necessary to do it unless some components of the Radar have been changed.
1.5.4.5
Automatic and Manual Tune
The Tune control is used to tune the receiver in the Radar antenna for maximum
target returns on the display. If no land or ship targets are available, you may
tune for maximum sea clutter. The tuning indicator shows the strength of tuning
peak conditions and is tuned for maximum deflection.
The Radar receiver can be tuned in Automatic or Manual mode. To adjust manu-
ally, follow the procedure below:
[MENU] + "TUNING" + [ENTER] + "MANUAL TUNE" + [ENTER]
otherwise to select automatic tuning:
[MENU] + "TUNING" + [ENTER] + "AUTOMATIC TUNE" + [ENTER]
In Automatic Tune mode, the Radar tunes itself automatically on all range scales.
It is recommended that you leave the Tune function in Automatic mode, to ensure
that the Radar receiver is always tuned to receive the maximum signal.
If you choose Manual Tuning, you will need to adjust it again 10 minutes after you
have turned on the Radar, since the required setting will change after the magne-
tron has warmed up. You should adjust the control to obtain the maximum signal
strength.
1.5.4.6
Save Tuning to User C-CARD
This is useful to avoid the user having to retune the Radar after a Clear RAM
operation or a software update. The following data will be saved:
♦
Heading Line angle
♦
Antenna Parking Position
♦
Sector Transmission Off Start Angle
♦
Sector Transmission Off End Angle
♦
Transmission Trigger Delay
♦
Course Tune
♦
Fine Tune
Insert the User C-CARD into the slot, then follow the procedure:
[MENU] + "TUNING" + [ENTER] + "SAVE TUNING TO USER C-CARD" +
[ENTER]
The file name is automatically named TUNING1.
