Chapter XIX Application Examples
233
screen, and click the menu key [Bus] to select the protocol trigger mode;
10) Click the menu key [Trigger On] at the bottom of the screen to pop up the I2C trigger type setup menu on the
right side of the screen, and click the menu key [Start] to set the I2C trigger type to Start.
In this way, connect the clock line of I2C bus to the channel 1 and connect the data line to the channel 2. The I2C
bus decoding trigger with the bus start position as the trigger point is displayed in the figure below:
The Frame Start of the I2C bus is indicated by a green left square bracket [. The Repeat Start occurs
when another start is displayed without a previous stop.
The Address is displayed in a yellow box, [w] means write and [R] means read.
The Data is displayed in a cyan box
The Missing Ack is indicated by an exclamation point in a red box.
The Stop is indicated by a red right square bracket.
Start
Address
Data
Missing
Ack
Stop
Fig. 19.4 I2C Trigger and Analysis Example
19.5
CAN Trigger and Analysis Example
If you want to observe the transmission of signals on the CAN bus, you can follow these steps below:
1)
Connect the CAN_L signal of CAN bus to channel 1 and click the channel control key on the front panel to
open channel 1;
2)
Click the
【
Bus
】
key in the Function Area on the front panel to pop up the bus setup menu on the lower
screen. Click the menu key [Bus] on the menu to pop up the bus type selection menu on the right side of the
screen. Click the menu key [CAN], select the CAN bus type, and switch to the CAN bus setup menu at the
bottom of the screen;
3)
Click the menu key [Bus Switch] at the bottom of the screen to turn on the bus decoding function;
4)
Click the menu key [Define Inputs] to pop up the CAN input setup menu on the right side of the screen.
Click the menu key [CAN Inputs] to pop up the Level3 Menu of CAN input selection on the left side of the
menu. Select the channel 1 by turning the Multipurpose b and then pressing the Multipurpose b to confirm
Select, or by directly clicking the channel 1 in the Level3 Menu on the screen. The selected channel is
displayed in the channel selection menu of the right menu;
5)
Click the menu key [Signal Type] to pop up the Level3 Menu of signal type selection on the left side of the
menu: select the CAN_L signal type by turning the Multipurpose b and then pressing the Multipurpose b to
confirm Select, or by directly clicking the CAN_L signal type in the Level3 Menu on the screen. The selected
signal type is displayed on the right signal type selection menu;
6)
Click the menu key [Sample Point] and turn the Multipurpose b to change the position of the sample point.
The sample point can be set to 70%;
7)
Click the menu key [Thresholds] to pop up the CAN channel threshold setup menu on the right side of the
Summary of Contents for 4456 Series
Page 10: ...VIII...
Page 55: ...Chapter V Trigger System 45 Fig 5 51 RF Test Signal Example...
Page 69: ...Chapter VII Mathematical Operation 59 Fig 7 10 Advanced Math Example...
Page 71: ...Chapter VIII Display System 61 Fig 8 3 Wfm Palette Menu Fig 8 4 Normal Palette...
Page 72: ...Chapter VIII Display System 62 Fig 8 5 Inverted Palette Fig 8 6 Temperature Palette...
Page 75: ...Chapter VIII Display System 65 Fig 8 12 XY Display Example...
Page 165: ...Chapter XI Protocol Analyzer Option 155 Fig 11 242 1553 Trigger and Analysis Example...