Rigol MSO/DS2000A Series Uživatelský manuál stáhnout pdf (Strana 126)

RIGOL Chapter 5 To Trigger the Oscilloscope

5-40 MSO2000A/DS2000A User’s Guide

Trigger Condition:

Press When to select the desired trigger condition.

 Start: trigger when SDA data transitions from high to low while SCL is high.

 Restart: trigger when another start condition occurs before a stop condition.

 Stop: trigger when SDA data transitions from low to high while SCL is high.

 Missing ACK: trigger when the SDA data is high during any acknowledgement of

SCL clock position.

 Address: trigger on the read or write bit when the preset address is met. After

this trigger condition is selected:

--press AddrBits to select “7 bit”, “8 bit” or “10 bit”;

--press Address to set the address value according to the setting in AddrBits

and the ranges are from 0 to 127, from 0 to 255 and from 0 to 1023 respectively;

--press Direction to select “Read”, “Write” or “R/W”.

Note: This setting is not available when AddrBits is set to “8 bit”.

 Data: Find the preset data value on SDA, and trigger on the dump edge of the

SCL of the last bit of the data. After this trigger condition is selected:

--press Byte Length to set the length of the data and the range is from 1 to 5;

--press CurrentBit to select the desired data bit and the range is from 0 to

(Byte Length×8-1);

--press Data to set the data pattern of the current data bit to X, H or L.

--press AllBits to set the data pattern of all the data bits to the data pattern

specified in Data.

 A&D: trigger when the “Address” and “Data” conditions are met at the same

time. After this trigger condition is selected: