Philips PM3208 - 5.3.31 Sweep Length Adjustment; 5.3.32 x10 MAG Time Adjustment

5
PERFORMANCE
CHECK
AND
ADJUSTMENT
PROCEDURE
REQUIREMENTS Check all positions of the MTB TIME/DIV switch.
Marker input
and
MTB TIME/DIV
0,2 us
0,5 us
1yus
2us
5 us
10 us
20 us
50 us
0,1 ms
0,2 ms
0,5 ms
ims
2ms
5 ms
10 ms
20 ms
50 ms
0,15
0,2s
0,5s
5.3.31 Sweep length adjustment
TEST EQUIPMENT _ Time-marker generator
SETTING Vertical mode - A
Horizontal mode - MTB
TIME/DIV - 0,1 ms
maximum coefficient error
X MAGN x10
measured over
central 8 div
X MAGN x1
+3%
+3%
+3%
+3%
+3%
+3%
+3 %
+3 %
+3%
+3 %
+3%
+3 %
+3%
+3%
+3%
+3%
+3%
+3%
+3%
+3%
+5 %
+5%
+5%
+5 %
+5 %-
+5%
+5%
+5 %
+5%
+5 %
+5 %
+5%
+5 %
+5%
+5%
+5 %
+5%
+5%
+5%
+5%
Apply a 0,1 ms marker pulse to channel A.
ADJUSTMENT Adjust VR614 (HOR PCB) for a sweep length of 11,5 divisions.
§.3.32 x10 MAG time adjustment
TEST EQUIPMENT _ Time-marker generator
SETTING Vertical input - A
Horizontal input - MTB
TIME/DIV - 1 ms
X position switch at x10
Apply a 0,1 ms marker pulse to channel A.
ADJUSTMENT Adjust VR807 (HOR PCB) for coincidence of the marker pulses with
the graticule lines.
5.3 PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE
5-13