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15.9 1553B Decoding (Option)
The oscilloscope samples the 1553B signal, and judges each data point to be logic "1"
or logic "0" according to the preset threshold level. 1553B decoding is required to
specify the data channel source and the threshold.
In the decode setting menu, press Decode1 > Bus Type, then rotate the
multifunction knob to select "1553B". Press down the knob to select it. You can
also press Bus Type continuously or enable the touch screen to select it.
1. Enable or Disable the Bus
Press Bus Status continuously to enable or disable the decoding function.
2. Quickly Apply 1553B Trigger Settings to 1553B Decoding
Press Copy Trig to copy the current 1553B trigger settings and apply them to
1553B decoding function (set the corresponding 1553B decoding parameters
automatically).
3. Set the Data Channel Source and the Threshold
- Press Data, then rotate the multifunction knob to select the desired data
channel source, and then press down the knob to select it. You can also press
Data continuously or enable the touch screen to select it. The available
channels include CH1-CH4.
- Press Threshold, then rotate the multifunction knob or use the pop-up
numeric keypad to set the threshold of the source channel. When you modify
the threshold of the channel, a dotted line displaying the current threshold level
is displayed on the screen. It disappears in about 2 s after you stop modifying
the threshold.
4. Set Display-related Parameters
Press Display to enter the display setting menu.
- Set the display format
Press Format, rotate the multifunction knob to select the display format of
the bus data. Then, press down the knob to select it. You can also press Format
continuously or enable the touch screen to select it. The available formats
include Hex, Dec, Bin, and ASCII.
- Adjust the vertical position of the bus
Protocol Decoding
276
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