Sony MAV-70 Manual page 62

3-2. SPG-15 Board Adjustment
5. Set the oscilloscope.
. VOLTS/DIV : DC 2V/DIV (CH-1, CH-2)
. SEC/DIV : 10 ms/DIV
. TRIG :
CH-1
6. Connect the CH-2 prove of the oscilloscope to TP304
(G-1), and prove's GND to E301 (G-1).
7. Align the burst phase to +90d with the SC PHASE
knob of the signal generator SG2 clockwise (2)
slowly.
8. Turn RV301 (F-1) clockwise (2) slowly until the
waveform of the oscilloscope's CH2 (TP304) change
from b to a. (Immediately before changing from b
to a.)
9. Align the burst phase to _90d with the SC PHASE
knob of the signal generator SG2 counterclockwise
(3) slowly. Make sure that the waveform of the
oscilloscope's CH2 is b during the SC PHASE knob
turning.
10. Align the burst phase to +90d with the SC PHASE
knob of the signal generator SG2 clockwise (2)
slowly. Make sure that the waveform of the oscillo-
scope's CH2 is b during the SC PHASE knob
turning.
11. If the specification is not met in step 9 or step 10, re-
adjust from step 7.
12. Re-align the burst phase to reference position with the
SC PHASE knob of the signal generator SG2 clock-
wise (3) slowly.
3-4 (E)
<Vector monitor>
+90d
_90d
<Oscilloscope>
CH-1
(FIELD REF)
b
CH-2
(TP304)
a
A B C D E
1
RV301
2
3
4
5
SPG-15 board (A side)
+90d
F G H J
1
TP304
E301
MAV-70