Serial Decode
Decoding Workflow
We recommend the following workflow for effective decoding:
1. Set up the decoder using the lowest level decoding mode available, but do not yet enable it.
2. Acquire at least one complete transmission reasonably well centered on screen in both directions, with
generous idle segments on both sides.
Note:
See
for more information about the required acquisition settings.
3. Stop acquisition, then enable the decoder. It will operate on the acquisition in buffer.
4. Use the various decoder tools to verify that transitions are being correctly decoded. Tune the decoder
settings as needed to produce a satisfactory decoding.
5. Once you are correctly decoding in one mode, continue making small acquisitions of five to eight
transmissions and run the decoder in higher level modes.
6. Finally, run the decoder on acquisitions of the desired length.
When you are satisfied the decoder is working properly, you can disable/enable the decoder as desired without
having to repeat this tuning process, provided the basic signal characteristics do not change.
Decoder Set Up
Use the Decode Setup dialog and its protocol-related subdialogs to configure decoders. Each decoder can use
different protocols and data sources, or have other variations, giving you maximum flexibility to compare different
signals or view the same signal from multiple perspectives.
1. Touch the Front Panel Serial Decode button (if available on your oscilloscope), or choose Analysis > Serial
Decode from the oscilloscope menu bar.
2. On the Serial Decode dialog, enable the decoder by checking On next to the decoder number. This may be
done any time, although we recommend having an acquisition in buffer before enabling the decoder.
3. Click the Setup button at the end of the row to open the Decode Setup dialog.
Note:
The full configuration can only be made from Decode Setup.
4. Enter the input channels (sources) and select the Protocol to be decoded. This selection will drive the other
fields that appear.
Note: Subdialog selections, such as single-ended or differential probing, may affect the input fields
that appear on the Decode Setup dialog.
5. Define the level of decoding on the subdialogs (see below) to the right of the Decode Setup dialog.
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