User`s guide

RIGOL Chapter 7 Protocol Decoding

DS1000Z User’s Guide

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4. Analog Channel Threshold Setting

To judge logic “1” and logic “0” of the buses, you need to set a threshold for

each analog channel (CH1-CH4). When the signal amplitude is greater than the

preset value, it is considered as “1”; otherwise “0”.

Threshold

Level

Press MATH  Decode Options  Auto Thre. to turn the auto threshold on

or off.

When the auto threshold is turned on, the instrument will calculate the center

point according to the current waveform trace automatically as the threshold of

each channel before decoding.

When the auto threshold is turned off, you can press Thre.Set to turn the auto

setting menu. Press CH1, CH2, CH3, CH4 and use to set the threshold of

each channel. Press 50% to set the current threshold to 50% of the current

waveform trace.

5. Display-related Setting

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

ASCII or LINE. Note that LINE format is displayed the acyual value of the

bus in a binary number form, and the order is consistent with the bus

transmission sequence. This format is only valid for the serial bus, because

the serial bus has the difference of bit sequence of LSB and MSB; if bit

sequence of the bus is selected MSB, the LINE format is the same to the

binary format.

 Press Pos and use to adjust the vertical display position of the bus.

6. Event Table

The event table displays the decoded data and the corresponding line number

and time in table form. It can be used to observe relatively longer decoded data

to solve the problem that some data cannot be viewed cleared on the screen.