Tektronix TPS2000 Series, Service Manual

Page: 46 / 106

Performance Verification
4- 4
TPS2000 Series Digital Storage Oscilloscopes Service Manual
Press menu button Select setting Select menu option
3. ACQUIRE Average 16
4. MEASURE
Source An unchecked channel
Type Mean
3. As shown below, connect the oscilloscope channel selected in the table to the
DC voltage source.
Digitizing oscilloscope
+ --
DC voltage
source
Dual banana
to BNC
adapter
BNC cable
4. For each VOLTS/DIV setting listed below, perform the following steps:
a. Set the DC voltage source output level to the positive voltage listed and
then record the mean measurement as V
pos
.
b.
Reverse the polarity of the DC voltage source and then record the mean
measurement as V
neg
.
c. Calculate V
diff
= V
pos
-- V
neg
and then compare V
diff
to the accuracy
limits in the table.
VOLTS/DIV setting DC voltage source output levels Accuracy limits for V
diff
5 mV/div +17.5 mV, --17.5 mV 33.6 mV to 36.4 mV
200 mV/div +700 mV, --700 mV 1.358 V to 1.442 V
2 V/div +7.00 V, --7.00 V 13.58 V to 14.42 V
5. Set DC voltage source output level to 0 V .
6. Disconnect the test setup.
7.
Repeat steps 1 through 6 until all input channels have been checked. For
example, check CH1 the first time through and CH2 the next time. On a
four-channel model, then test CH3 and CH4.