Tektronix CSA8000 Series, Service Manual

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Electrical Sampling Modules
4–54
CSA8000 & TDS8000 Instruments and Sampling Modules
Install the test hookup:
1. Install the 80E0X module into the left-most small module compartment of
the TDS8000 or CSA8000 instrument (see Figure 4–16).
2. Connect the Digital multimeter to Channel 1 of the 80E0X module. See
Figure 4–16.
CSA8000/TDS8000
Digital
multimeter
– +
Channel 1
Figure 4–16: Input impedance test hookup
3. Set up the CSA8000/TDS8000 as follows:
a. Select C1 from the Waveform Selector menu on the controls bar at the
bottom of the display (left corner).
b. In the Trig Setup dialog box, select Internal Clock (200 KHz).
c. In the Vert Setup dialog box, set Offset to 0.0 V.
d. In the Horz Setup dialog box:
H
set Scale to 2 ns/division.
H
set Position to 0 (this will revert to a minium non-zero value).
H
set Horizontal Reference to 0%.
e. In the Acq Setup dialog box, set Acquisition Mode to Sample.
Follow this procedure to make the input impedance check:
1. Set the Digital multimeter to the ohm mode.
2. Record InputR reading on the Digital multimeter.
3. Reverse polarity and record InputR reading on the Digital multimeter.
Setup
Test: