Signal Acquisition System Checks - Tektronix TDS 500B Technical Reference

Signal Acquisition System Checks

Check Offset Accuracy
(Zero Setting)
TDS 500B, TDS 600B & TDS 700A Performance Verification and Specifications
These procedures check those characteristics that relate to the signal-acquisition
system and are listed as checked under Warranted Characteristics in Specifica-
tions.
Equipment None
Required
Prerequisites The oscilloscope must meet the prerequisites listed on page 1–15.
See Input Channels vs. 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 600B, press the main-menu button Mode; then press the
side-menu button Average 16.
H On the TDS 500B and 700A, 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
1–27