On Sunday 14 March 2004 22:36, Holger Waechtler wrote: > On Sunday 14 March 2004 23:35, Andrew de Quincey wrote: > > > If you specify a bus voltage of 13 or 18V you definitely don't mean > > > VOLTAGE_OFF but expect the LNBP working, everything else is a bug. > > > > Yeah, it seemed to have changed from being set to VOLTAGE_13 in the > > initialisation tables to being set to VOLTAGE_OFF by default... somewhere > > between the 1.0.1 and the 1.1.0 release. > > > > Defaulting to VOLTAGE_OFF makes sense though; no point powering up the > > LNB until its actually needed. What do you think of Johannes' idea of it > > auto powering up on frontend open? > > makes not really sense -- you can't really tune a LNB wothout setting up > polarisation plane and the band selection switch before, can't you? > > As soon you submit the polarisation selection command (VOLTAGE_13V or > VOLTAGE_18V) you already powered up the LNB. The only important thing is to > maintain the delay times required by the spec, the diseqc.c example shows > how this can get implemented.
I think the problem was they're using DISEQC 1.0/2.0 switches, but weren't using the older voltage-based polarisation selection commands, assuming that the frontend would have automatically applied some power to the LNB (BTW: I do know the sequence in the DISEQC spec says you should specify the voltage; I use that exact sequence in my code). I suppose its a matter of how tolerant we want to be of userspace programs.. I mean, we already turn OFF the LNB power automatically, why not turn it on as well? -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
