[Ronja] How distinguish packets at U63 in Twister?

[Karel Kulhavy]

The data are going through a different path.

Karel
---- Cecilia Puon <cpuon at fsomexico.com> schrieb:
> Hello, everybody, I still dont understand how can i send data if the
> packets produce zero on U63-10, in agreement with "How does ronja
> work?". How can I distinguish the data at the end of U63?
> 
> I re-write the part in which Ronja people describes the function of the
> pulse extenders, in this part they describe how packets generate zero at
> the end of U63.
> 
> "U54 is just a buffer. C66 and R52 replace leading edges in the signal
> with short H impulses and everything else with L. U52 inverts it and on
> every leading edge of the original signal, U63 gets reset to zeroes on
> all outputs. On every tick of the 16MHz clock (62.5 ns) one tap gets set
> to one. That means if the output is on the 5th tap, it gets set from
> 
> 0 back to 1 after 4-5 ticks, that means after 250-312.5 ns it gets back to H.
> 
> If the incoming signal has the leading edge pitch less than 250ns, then the output stays
> permanently in 0. If it has more, then it will contain ones interspersed with zeroes.
> 
> The Manchester signal has maximum leading edge pitch of 200ns(5Mhz). The silence between
> the packets takes at least 9600ns. So packets will produce zero on U63-10 and the interframe gaps one."
> 
> Thank you for your help.
> 
> Cecilia Puón. 
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