Performance Tests
4-40
TDS 420A, TDS 430A & TDS 460A Service Manual
b. Select the Delayed trigger system:
H Press SHIFT; then press the front-panel button DELAYED TRIG.
H Press the main-menu button Level.
c. Measure the test signal: Press the side-menu
button SET TO 50%.
Read the measurement results in the side menu below the label Level.
d. Check against limits: Do the following subparts in the order listed.
H Subtract the trigger level readout from the DC calibration generator
setting. The result is the trigger level accuracy.
H CHECK that the trigger level is accurate to within ᐔ18 mV.
H Press TRIGGER MENU. Press the main-menu button Slope; then
press the side-menu button for negative slope. (See icon at left.)
H Subtract the trigger level readout from the DC calibration generator
setting. The result is the trigger level accuracy.
H CHECK that the trigger level is accurate to within ᐔ18 mV.
4. Disconnect the hookup:
a. First set the output of the DC calibration generator to 0 volts.
b. Then disconnect the cable from the generator output at the input
connector of CH 1.
Equipment
Required
One sine wave generator (Item 11)
One precision 50 Ω coaxial cable (Item 5)
One 10X attenuator (Item 1)
One 5X attenuator (Item 2)
Prerequisites See page 4--15.
1. Install the test hookup and preset the oscilloscope 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.
Sensitivity, Edge Trigger,
DC Coupled
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