Differential Manchester encoding

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NDK
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Differential Manchester encoding

Post by NDK »

Now that Picoscope can decode Manchester encoding (and very nice it is too), may I add Differential Manchester encoding to the wish list? I have an application that uses it and I'd imagine it's not a huge change to decode that as well.

Nick

Martyn
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Re: Differential Manchester encoding

Post by Martyn »

Often the decoders will work on a single leg of a differential signal subject to noise. If noise prevents this in your setup then you can use two channels and create a Math Channel (A-B) and use that for decoding.
Martyn
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NDK
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Re: Differential Manchester encoding

Post by NDK »

My signal isn't differential (small "d"): "Differential Manchester" encoding encodes bits in a different way to Manchester encoding.

In Manchester encoding, the mid-bit transition denotes a 0 (high to low) or a 1 (low to high).

In Differential Manchester encoding, the start-bit transition denotes a 0 (transition) or a 1 (no transition). The signal can be inverted and still be valid since it's only the presence or a absence of a transition that's important.

Martyn
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Re: Differential Manchester encoding

Post by Martyn »

Thanks for clearing that up. I will add the request for the team to consider however I will caution that, as this is the first request, it will be relatively low priority.
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NDK
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Re: Differential Manchester encoding

Post by NDK »

Thanks Martyn. I'm happy to be the first (and hopefully not the last).

daguez
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Re: Differential Manchester encoding

Post by daguez »

Hi,
any news on that? It would be very usefull for me too.

Thanks,
Alberto

creed
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Re: Differential Manchester encoding

Post by creed »

This would be useful for our team as well.

Martyn
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Re: Differential Manchester encoding

Post by Martyn »

This is climbing up the feature request list, it would be useful to have some sample psdata files showing the data, end expected decode, so when we start work we will have something to test with.
Martyn
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