TEK 2225 - Page 64

Adjustment Procedure-2225 Service
INDEXTO ADJUSTMENTPROCEDURE
STEPS
Power Supply and CRT Display
Page
1 . CheckIAdjust Power Supply DC Levels ... 5-4
..................
.
2 Adjust CRT Grid Bias 5-5
...................
3 . Adjust Astigmatism 5-5
................
4 . Adjust Trace Alignment 5-5
.....................
5 . Adjust Geometry 5-5
Vertical
......
1 . Adjust Channel 1 Variable Balance 5-6
2
. Adjust Channel 2 Variable Balance ...... 5-6
........
3 . Adjust Channel 2 Invert Balance 5-7
4 . Adjust Vertical Gain ................... 5-7
5
. Check Deflection Accuracy and
.............
VOLTSIDIV Variable l3ang; 5-7
.................
6 . Check Input Coupling 5-8
7 . Check Position Range ................. 5-8
................
8 . Adjust XI 1x10 Balance 5-8
9
. Adjust Attenuator Compensation ........ 5-9
.........
10 . Check Vertical ALT Operation 5-1 0
............... 1 1 . Check CHOP Operation 5-1 0
12
. Check TRACE SEP Range ............. 5-1 0
13
. Check ADD MODE Operation .......... 5-10
Horizontal
.................
1 . Adjust 1-ms Timing 5-13
................
2 . Adjust Magnifier Gain 5-13
3
. Adjust Magnifier Registration .......... 5-13
4
. Check Sweep Length ................ 5-14
5
. Check Position Range ............... 5-14
...............
6 . Check Variable Range 5-14
7
. Adjust 10-ps and 5-ps Timing ....... 5-14
8 . Adjust High-speed Timing ............ 5-14
9
. Check Timing Accuracy and Linearity . . 5-14
10
. Adjust X-Y Gain and Offset .......... 5-16
.................
11 . Check X Bandwidth 5-17
12
. Check Sweep Holdoff ............... 5-17
Trigger
Adjust Trigger Offset Channel Balance .
Adjust Trigger Sensitivity. Slope Balance.
and P-P Offset
.....................
.............
Check Trigger Sensitivity
........... Check LF P-P Auto Trigger
Adjust External Trigger Offset
and Range
.........................
........ Check Single Sweep Operation
14
. Adjust High-Frequency Compensation . . 5-10
15
. Check Bandwidth .................... 5-1 1
External Z-Axis and Probe Adjust
.............. 16 . Check Channel Isolation 5-12
. ......
17 . Check Common-Mode Rejection
1 Check External Z-Axis Operation 5-22
Ratio
..............................
5-12 2 . Check Probe Adjust Operation ........ 5-22
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