Performance Tests
TDS7104 & TDS7054 Service Manual
4-75
H Set the Horizontal SCALE to 200 s.
H If necessary, adjust the calibration generator output for 5 divisions of
amplitude. (For oscilloscopes with 50 Ω inputs, you may need to
double the output of the generator to get 5 divisions of amplitude.)
H From the tool bar, touch Horiz and select the Acquisition tab.
H Touch Average and set the number of averages to 64.
H Touch the Close button.
2. Confirm AUX OUT is within limits for logic levels:
a. Display the test signal:
H Press the Vertical CH 3 buttontoturnoffCH3.
H Press the Vertical CH 2 button to display that channel.
H Set the Vertical SCALE to 1 V.
H Use the Vertical POSITION knob to center the display on screen.
b. Measure logic levels:
H From the button bar, touch MEAS and select the Ampl tab.
H Touch the High and Low buttons.
H Touch the Close button.
c. Check AUX OUT output against limits:
H CHECK that the CH 2 High readout is ≥2.5 volts and that the CH 2
Low readout is ≤0.7 volts. See Figure 4--34.
H Enter the high and low voltages on the test record.
H From the button bar, touch the Vert button. Touch the Termination
50 Ω button.
H CHECK that the CH 2 High readout is ≥1.0 volt and that the CH 2
Low readout ≤0.25 volts.
H Enter the high and low voltages on the test record.
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