Chapter 12 Serial Bus Trigger and Decode (Optional)
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f)
Manchester coding error: Triggered when a Manchester coding error is detected.
g)
Data word: Triggered when the specified data word is detected.
h)
Odd parity error: Triggered when the odd parity bit is incorrect for data in the word.
i)
All errors: Triggered when an error is detected.
⚫
1553B serial decode
The measured signal source is CH1, the bus display is hexadecimal, the baud rate is 12.5kb/s, and the
trigger mode is the command/status word sync header, and operate as follows:
(1) Tap S1 to open the decode channel, and click S1 again to open the bus configuration menu;
(2) Select the bus type as “1553B”, source as “CH1’, and display in “hexadecimal”.
(3) Open the trigger setting menu, select the trigger type as bus trigger, 1553B, and trigger mode as
“command/status word sync header”.
Channel
threshold level
is adjusted according to signal amplitude. 1553B trigger graphic interface is shown
in Figure 12-32:
Figure 12-32 1553B Graphic Interface
1553B decode data packet description:
(1)
Remote terminal address (5-bit data): blue
(2)
The value of remaining 11 bits of the command/status word: yellow
(3)
Decoded data: white
(4)
If the command/status or data word has a parity error, its decoded text is displayed in red instead
