Tektronix CSA8000 Series, Service Manual

Page: 162 / 354

Electrical Sampling Modules
4–58
CSA8000 & TDS8000 Instruments and Sampling Modules
e. In the Meas Setup dialog box:
H
make sure the channel under test is selected in the Source menu.
H
select Meas 1, and then choose Select Meas > Amplitude > Mean.
f. In the Vert Setup dialog box:
H
set Scale to 100 mV/division.
H
set Offset to –1100 mV.
Table 4–2: DC Voltage measurement accuracy
DC power supply settings Offset settings Accuracy limits
–1550 mV –1100 mV 18.7 mV
–1350 mV –1100 mV 14.7 mV
–1100 mV –1100 mV 9.7 mV
–850 mV –1100 mV 14.7 mV
–650 mV –1100 mV 18.7 mV
–450 mV 0 mV 11 mV
–250 mV 0 mV 7 mV
0 mV 0 mV 2 mV
+250 mV 0 mV 7 mV
+450 mV 0 mV 11 mV
+650 mV +1100 mV 18.7 mV
+850 mV +1100 mV 14.7 mV
+1100 mV +1100 mV 9.7 mV
+1350 mV +1100 mV 14.7 mV
+1550 mV +1100 mV 18.7 mV
Follow this procedure to make the Vertical DC accuracy checks:
1. Select the DC supply voltage to the settings listed in Table 4–2, page 4–58.
2. Press the CLEAR DATA button on the front panel.
3. Press the RUN/STOP button on the front panel.
4. Record input voltage reading on the digital multimeter.
5. Record the voltage for the Mean measurement displayed on the
CSA8000/TDS8000 screen.
Test