Signal Acquisition System Checks - Tektronix TDS 500D Technical Reference

Signal Acquisition System Checks

Check Offset Accuracy
(Zero Setting)
TDS 500D, TDS 600C, TDS 700D & TDS 714L Performance Verification and Specifications
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These procedures check those characteristics that relate to the signal-acquisition
system and are listed as checked under Warranted Characteristics in Specifica-
tions. Refer to Table 1–1 on page 1–18 for test equipment specifications.
Equipment None
required
Prerequisites The oscilloscope must meet the prerequisites listed on page 1–17.
See Input Channels versus Model on page 1–2.
1. Preset the instrument controls:
a. Initialize the oscilloscope:
H Press save/recall SETUP.
H Press the main-menu button Recall Factory Setup.
H Press the side-menu button OK Confirm Factory Init.
H Press CLEAR MENU to remove the menus from the screen.
b. Modify the default settings:
H Press SHIFT; then press ACQUIRE MENU.
H On the TDS 600C, press the main-menu button Mode; then press the
side-menu button Average 16.
H On the TDS 500D, 700D and 714L, press the main-menu button
Mode; then press the side-menu button Hi Res.
H Press CURSOR.
H Press the main-menu button Function; then press the side-menu
button H Bars.
H Press CLEAR MENU.
H Be sure to disconnect any input signals from all four channels.
2. Confirm input channels are within limits for offset accuracy at zero offset:
Do the following substeps — test CH 1 first, skipping substep a, since CH 1
is already set up to be checked from step 1.
a. Select an unchecked channel: Press WAVEFORM OFF to remove the
channel just confirmed from the display. Then, press the front-panel
button that corresponds to the channel you are to confirm.
Performance Tests
1–35