Rigol DS2102A DS2000 serie User guide

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RIGOL Chapter 7 Digital Channel

7-6 MSO2000A/DS2000A User’s Guide

To Use the Digital Bus

Users can display the three groups of channels (D7-D0, D15-D8 and D15-D0) as

digital buses according to their needs. Each bus value will be displayed at the bottom

of the screen in data or graph form. You can create up to 2 buses.

Press LA  Bus to enter the digital bus setting menu.

 Press Bus to select “BUS1” or “BUS2”.

 Press BusStatus to turn on or off the digital bus.

 Press Sel CH to set the corresponding channels of BUS1 or BUS2 to D7-D0,

D15-D8 or D15-D0.

 Press Endian to set the bus endian to “Normal (D0 locates at the least

significant bit)” or “I nvert (D0 locates at the most significant bit)” and the

default is “Normal”.

 Press RefClock to select any channel of D0-D15 or CH1-CH2 as the reference

clock of the bus. Selecting “None” means no reference clock will be used.

When CH1 or CH2 is selected to be the reference clock, you can press

Threshold and rotate the multifunction knob to set the threshold of the

clock channel, the range is from (-4* vertical scale - vertical position) to

(4* vertical scale - vertical position). Pressing down

can quickly reset the

threshold level of the clock channel to 0 V. When any channel of D0-D15 is

selected to be the reference clock, Threshold will be hidden automatically and

the threshold cannot be set.

 Press Slope to set the sample edge type of the reference clock to (rising

edge) or

(falling edge).

 Press Type to set the display mode of the digital bus to “Data” or “Graph”. I n

data mode, the bus data is displayed; in graph mode, the oscilloscope displays

the level of the corresponding value of the bus data for easier observation of the

variation tendency of the bus values.

 Press Format to set the display format of the digital bus to Hex, Decimal, Binary

or ASCII .

 Press Jitter Reject to turn on the jitter rejection function. Jitter refers to the

short-term deviation of the signal relative to its ideal time position at certain

time point, as shown as T1 and T2 in

Figure 7-1. When no reference clock is

selected for the bus, the jump status of each channel would cause the variation

of the bus data and undesired data would be generated due to jitter when the

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Rigol DS2102A oscilloscope