Tektronix 371B, Service Manual

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Performance Verification
371B Service Manual
5-55
. See “Test Point and Adjustment Locations Pullout 2” in Chapter 8 for the
location of test points.
Determining Whether Adjustment is Necessary.
1. EXAMINE the digital multimeter for a reading of 0 mV 1 mV when the
STEP/OFFSET AMPLITUDE is set to 5 V, 2 V, and 1 V.
2. Change the following 371B setting:
The indicator above the STEP MULTI .1X button will be lit.
3. EXAMINE the digital multimeter for a reading of 0 mV 1 mV when
STEP/OFFSET AMPLITUDE is set to 100 mV, 200 mV, and 500 mV.
If the digital multimeter reading is within the given limits in Steps 1 and 3,
no adjustment is necessary and the remainder of this procedure may be
skipped.
Adjusting Step Generator (SG) Balance.
. See “Test and Point Adjustment Locations Pullout 2” in Chapter 8 for the
location of adjustments R210.
4. Change the following 371B settings:
! !
5. ADJUST SG BALANCE adjustment R210 on the A7 Step Generator board
for a digital multimeter reading of 0 V 1 mV.