Tune Peak Adjustment; Tune Indicator Level; Stop Antenna In The Specified Direction; Ice Class Standby Mode - JRC JMA-3400 Series Instruction Manual

8.4.7 TUNE PEAK ADJUSTMENT

Don't adjust the tune peak adjustment value unless the serviceman. This
value is already setting in the factory. If change this value in unnecessary,
Auto Tune function will be influenced, and radar echo will become weak at
Auto Tune, and this may lead to accidents.
Please make adjustments tuning indicator bar to be swing largest at the tuning position of the maximum
sensitivity. This adjustment must be done with (8.4.8 Tuning indicator) alternately.
Set the range to 48NM.
Note:
Always to be set the tune-peak-adjustment value of near the 64 at the factory.
When the equipment is used for a long time and automatic tuning function no longer works properly,
adjusting the tune peak adjustment value may result in improvement of the automatic tuning function.
It should be noted that an optimal adjustment value is required for proper operation of the automatic
tuning function.

8.4.8 TUNE INDICATOR LEVEL

Don't adjust the tune indicator level value to 100% tune bar. This value is
already setting in the factory. If change this value in unnecessary, Auto
Tune function will be influenced, and radar echo will become weak at Auto
Tune, and this may lead to accidents.
If the tuning level is too low, then you need to adjust the tune indicator level.
Set the range to 48NM.
Note:
Do not let the tune indicator bar reach 100% while adjusting the tune level.
The automatic tuning function may not perform properly if the bar reaches 100%.
Set the level such that the tune indicator bar always reads 80% to 90%.

8.4.9 STOP ANTENNA IN THE SPECIFIED DIRECTION

Stop antenna in the specified direction when switching from TX mode to STBY mode.
Select " ON/OFF ", and turn the function on/off.
Select " Angle " , and specify the direction of stopping antenna.
It will be the relative direction from your ship, so please measure and adjust the direction with EBL.

8.4.10 ICE CLASS STANDBY MODE

In this mode, the scanner is rotated when transmission is in the standby state.
This mode is effective to prevent the antenna's rotating shaft from freezing.
Chapter 8 DETAIL PERFORMANCE
161