Tektronix CSA7404B - Page 189

Performance Tests
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
4-113
H Adjust the output of the DC calibration generator until it precisely
overlaps the top (upper) level of the stored probe compensation
signal. (This value will be near 0.0 V).
H Record the setting of the DC generator.
H Adjust the output of the DC calibration generator until it precisely
overlaps the base (lower) level of the stored probe compensation
signal. (This value will be near --500 mV).
H Record the setting of the DC generator.
f. Press Close to remove the menus from the display. See Figure 4--34.
Figure 4- 34: Measurement of probe compensator amplitude
g. Check against limits:
H Subtract the value just obtained (base level) from that obtained
previously (top level).
H CHECK that the difference obtained is within 400 mV to 600 mV,
inclusive.
H Enter voltage difference on test record.
3. Disconnect the hookup: Disconnect the cable and adapter from CH 1.