Performance Tests
4–64 TDS 684A, TDS 744A, & TDS 784A Service Manual
HAdjust 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 500 mV.)
HRecord the setting of the DC generator.
HAdjust 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 zero volts.)
HRecord the setting of the DC generator.
f. Press CLEAR MENU to remove the menus from the display. See
Figure 4–24.
Figure 4–24: Measurement of Probe Compensator Amplitude
g. Check against limits:
HSubtract the value just obtained (base level) from that obtained
previously (top level).
HCHECK that the difference obtained is within 495 mV to 505 mV,
inclusive.
HEnter voltage difference on test record.
3. Disconnect the hookup: Disconnect the cable from CH 1.