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Appendix E: Tektronix TDS 1002B Oscilloscope

201060

unfiltered. One also specifies the type of signal detail to trigger on, selecting from 11 types of

measurements.

MEASURE Menu The MEASURE menu allows waveform measurements to be continuously

updated and displayed. There are 11 types of available measurements, from which you can dis-

play up to five measurements at a time, one assigned to each Option Button. Push one of the op-

tion buttons and a new menu is displayed allowing you to set the Source: CH1, CH2, MATH,

and the measurement Type: Freq, Period, Mean (voltage), Pk-Pk (peak-to-peak), Cyc RMS (the

root-mean-square voltage of the first complete cycle, like V

rms

from the DMM), Min (minimum

voltage), Max (maximum voltage), Rise Time, Fall Time (10% to 90% transitions), Pos(itive)

Width, Neg(ative) Width (at the waveform 50% level).

If a measurement is displayed with a question mark, try switching scales. Generally the scope

wants signals that are several divisions high and that complete at least one—but not too many—

cycles in the display.

CURSOR Menu The CURSOR menu enables a pair of Amplitude or Time measuring lines.

With Amplitude cursors, a pair of horizontal lines appears. Pressing the appropriate option button

allows the MULTIFUNCTION KNOB to move each cursor up or down to the required place. The

voltage for each cursor is displayed along with the difference (ΔV) between them. For Time cur-

sors, a pair of vertical lines appears. Pressing the appropriate option button allows the MULTI-

FUNCTION KNOB to move each cursor right or left to the required place. The voltage and time for

each cursor is displayed along with the differences (Δt, ΔV) between them, and frequency 1/Δt.

DISPLAY Menu Use the DISPLAY menu to select the display characteristics for waveforms,

such as the display type, persistence, format, and contrast.

The bottom of the display is used to report key numerical values like scale settings. For example:

The first two numbers of the first line are the volts/div for channels CH1 and CH2, M refers to the

main time-base of 1.00 ms/div, and the final sequence reports that triggering looks at Channel 1

for a positive edge at a level of 0.00 V. The second line shows the date/time and the frequency of

the triggering signal.

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