Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-41
b. Modify the initialized front-panel control settings:
H Set the horizontal SCALE for the M (main) time base to 20 ns.
H Press HORIZONTAL MENU; then press the main-menu button
Time Base.
H Press the side-menu button Delayed Only; then press the side-menu
button Delayed Triggerable.
H Set the horizontal SCALE for the D (delayed) time base to 20 ns;
then press the side-menu button Main Only.
H Press TRIGGER MENU; then press the main-menu button Mode
&Holdoff. Now press the side-menu button Normal.
H Press VERTICAL MENU; then press the main-menu button
Coupling. Now press the side-menu button Ω to select the
50 Ω setting.
H Press SHIFT;thenpressACQUIRE MENU. Now press the
main-menu button Mode; then press the side-menu button
Average 16.
c. Hook up the test-signal source: Connect, through a 50 Ω precision
coaxial cable, the signal output of a sine wave generator to CH 1 (see
Figure 4--13).
Digitizing Oscilloscope
Sine Wave
Generator
Output
Figure 4- 13: Initial Test Hookup
2. Confirm Main and Delayed trigger systems are within sensitivity limits
(50 MHz):
a. Display the test signal:
H Set the generator frequency to 50 MHz.
H Press MEASURE.
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