Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-45
H Press the main-menu button Recall Factory Setup.
H Press the side-menu button OK Confirm Factory Init.
b. Modify the initialized front-panel control settings:
H Set the vertical SCALE to 1 volt; set the horizontal SCAL E
to 20 ns.
H Press VERTICAL MENU.
H Press the main-menu button Coupling. Press the side-menu button
Ω to toggle it to the 50 Ω setting.
H Press TRIGGER MENU. Press the main-button S OURCE; then
press the side-menu button -- m o r e -- until Auxiliary appears in the
side menu. Press the side-menu button Auxiliary.
H Press the Coupling main-menu button; then press the AC side-
menu button.
c. Hook up the test-signal source:
H Connect a BNC T connector to the output of the sine wave generator
(see Figure 4--15).
H Connect one 50 Ω cable to one side of the BNC T connector;
connect a second 50 Ω cable to the other side of the
BNC T connector.
H Connect one of the cables just installed to CH 1; connect the other
cable just installed to the AUX TRIGGER input at the rear panel.
Sine Wave
Generator
Output
To Rear Panel
Digitizing Oscilloscope
Figure 4- 15: Initial Test Hookup
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