Onwa KR-1338 Service Manual page 15

AUTOMATIC TUNING
There are two types of automatic tuning: peak search and short search. The tuning
voltage differs from model to model.
KR-1338/1668 : 5 V to 28 V
Peak search: Tuning voltage (TUNING), point
in the tuning voltage range 5V to
(TUNING IND) is maximum at point
Search conditions: After initial tuning adjustment.
Search time: 3 sec approx
Short search: Maximum tuning indicator voltage
voltage range of
1)After initial tuning adjustment.
2)When tuning method is switched from manual to automatic.
3)When the radar is switched from ST-BY to TX.
4)When a range where pulselength is changed from short to middle
and from middle to long is selected.
Tracking: After short search, tracking takes place.
Tracking voltage: 0 V to 32 V
2.5V.
A
in the figure below, is searched
28V. Tuning In dicator
A
.
is searched in the tuning
A
KR-1338/1668
voltage
11