Performance Tests
4–62 TDS 684A, TDS 744A, & TDS 784A Service Manual
HSelect 128 averages.
2. Confirm that the Probe Compensator signal is within limits for frequency:
a. Measure the frequency of the probe compensation signal:
HPress MEASURE; then press the main-menu button Select
Measrmnt for Ch1.
HRepeatedly press the side-menu button –more– until Frequency
appears in the side menu (its icon is shown at the left). Press the
side-menu button Frequency.
b. Check against limits:
HCHECK that the CH 1 Freq readout is within 950 Hz to 1.050 kHz,
inclusive. See Figure 4–22.
HEnter frequency on test record.
HPress MEASURE; then press the main-menu button Remove
Measrmnt for Ch1. Press the side–menu Measurement 1.
Figure 4–22: Measurement of Probe Compensator Frequency
c. Save the probe compensation signal in reference memory: