Rigol DS1000MD Uživatelský manuál stáhnout pdf (Strana 3)

RIGOL TECHNOLOGIES USA INC

877-4-RIGOL-1 How-To Guide

www.rigolna.com

Sampling rate and Long Memory:

Using the DS1000E and DS1000D Series Rigol digital scopes, users can

access the long memory mode to get up to 512Kpts in dual channel mode

and up to 1Mpts in single channel mode. In comparison, standard memory

depth for oscilloscopes range from 1000pts - 16Kpts.

This high sampling rate is a big advantage when observing signals

where the application requires capturing a longer waveform, but also needs

to confirm higher frequency components within the signal.

The best way to visualize these higher frequency components is to use

the zoom feature. By pushing the Horizontal knob, you can enter zoom

mode. In this screen shot you see a 0.5 second waveform in yellow across

the top. In the lower section we have zoomed in to 10 usec/division. Since

we are sampling in normal mode you can see the distance between two data

points. A straight line connects data points and you can see where the signal

rises between samples and is clearly being linearly interpolated. On the

DS1000D/E Series scopes this normal mode operation has 16 Kpts per wave.

Since the overall wave is set to 50 msec/div the 10 divisions across the

screen make the wave 0.5 seconds. 16 Kpts spread across 0.5 seconds means

there is one sample approximately every 32 usec. This is confirmed by the

screen shot.

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Rigol DS1000MD Uživatelský manuál Strana 3