Performance Tests
4-48
TDS 420A, TDS 430A & TDS 460A Service Manual
H Connect the output of the sine wave generator through an N-to-BNC
adaptor , and a 50 Ω precision coaxial cable to the CH 1 input of
the oscilloscope.
H Set the Vertical S CALE to 100 mV.
H Press VERTICAL MENU, then press the Coupling main-
menu button.
H Set the coupling to 50 Ω.
H Set the output of the sine wave generator for a 100 KHz 4 division
sine wave.
c. Modify the default settings:
H Press HORIZONTAL MENU, then press the Clock main-
menu button.
H Press the side-menu button External.
H Set the Max Ext Clock Rate to 10.0 MHz.
H Press CLEAR MENU.
d. Check external clock:
H CHECK that the displayed sine wave has a one division period.
H Slowly adjust the frequency of the function generator to 10 MHz
while watching the display.
H CHECK that the period of the displayed sine wave changes to
two divisions.
H Press CLEAR MENU.
2. Disconnect the hookup: Disconnect the cables from the generators at the
CH 1 and AUX TRIGGER/EXT CLOCK input connectors.
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