[vdr] DiSEqC and uncommitted switches (how to)

["Michael Dreher" <list@5dot1.de>]

Hi Ora,

 > I couldn't find a specification for the delay required anywhere,
 > but 125  ms seems to do the trick.

You can find this information in chapter 5.2 "Multi-Stage (Loop-through)
DiSEqC System" of the document "APPLICATION INFORMATION FOR
TUNER-RECEIVER/IRDS" (applic_info_turner-receiver.pdf, can be downloaded
from Eutelsat):

"This operating mode applies not only to "Loop-through" LNBs, but any
switching system where there is a "distant" DiSEqC Slave which only
receives power (and/or commands) when a "nearby" Switcher selects it as a
source. In this case, the transmission of a DiSEqC command may cause the
"nearby" switch to operate, which then applies power to the "distant" slave,
which cannot have seen the command. Therefore, the command needs to be
repeated after not less than 100 ms, when the "distant" slave has had time
to power-up and initialise."

  Michael




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