JRC JMA-5204 Instruction Manual page 379

[II] Noise Level Adjustment Mode (Setting Mode)
Procedure 1 Hold down [RADAR MENU] key.
The Code Input Menu will appear.
2 Press [0] key.
3 Move the cursor onto the "ENT" button
in the Code Input menu, and press
[ENT] key.
The Adjust Menu will appear.
4 When the Adjust Menu appears, press
[8] key.
The SP/TT INIT Setup Menu will appear.
5 Press [1] key.
Noise Level Menu will appear.
6 Press [2] key.
The noise level adjustment mode is switched between on and off.
Factory-adjustment method
Exit 1 Press [RADAR MENU] key.
The Main Menu will reappear.
The GAIN control is set to the maximum position, the SEA control is set to the
minimum position, the RAIN control is set to the minimum position, and IR,
AUTO-SEA, AUTO-RAIN, PROC, FUNC, and TRAILS are all set to off.
The noise level adjustment mode is turned on.
While the noise level adjustment value is decreased gradually, the value with which
radar echoes no longer appear is determined as the set value.
Ten is added to the set value (with which radar echoes no longer appear), and the result
is set as the final noise level adjustment value.
The noise level adjustment mode is turned off when the adjustment is finished.
7.4 ADJUSTMENT
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