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Performance Tests

4-36

TDS 420A, TDS 430A & TDS 460A Service Manual

H Set the frequency of the time standard to 1.0 MHz (or a period of

1.00 s).

H Adjust the amplitude of the time standard for a 5 to 7

division display.

H Press CLEAR MENU.

H Press SET LEVEL TO 50%.

H Rotate the horizontal and vertical POSITION controls to move the

rising edge of the waveform so that it crosses the center of both the

horizontal and vertical graticule lines.

H Press HORIZONTAL MENU; then press the main-menu button

Time Base. Press the side-menu button Delayed Only

H Use the horizontal SCALE knob to set the D (delayed) time base

to 100 ns.

H Press the side-menu button Delayed Runs After Main; then use the

General Purpose knob to set Delayed Runs After Main to 10.0 s.

H CHECK that the rising edge of the waveform crosses the center

horizontal graticule line at a point within ±0.5 divisions of the center

graticule (see Figure 4--11).

H Use the horizontal SCALE knob to set the D (delayed) time base

to 50 s. (The scale of the Main time base will also change.)

H Use the General Purpose knob to set Delayed Runs After Main

to 100 s.

H Use the horizontal SCALE knob to set the D (delayed) time base

to 100 ns.

H CHECK that the rising edge of the waveform crosses the center

horizontal graticule line at a point within ±0.5 divisions of the

center graticule.

Tektronix TDS 420A Service Manual

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