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.
With the DVB driver I am able to use a VDR DiSEqC setup like S19.2E 11700 V 9750 [E0 10 38 F0] W100 [E0 10 38 F0] S19.2E 99999 V 10600 [E0 10 38 F1] W100 [E0 10 38 F1] S19.2E 11700 H 9750 [E0 10 38 F2] W100 [E0 10 38 F2] S19.2E 99999 H 10600 [E0 10 38 F3] W100 [E0 10 38 F3] here the sequence [E0 10 38 F0] is sent, followed by a 100ms wait, and then [E0 10 38 F0] is repeated because the multiswitch is behind a DiSEqC relay. There's no need for explicit tone or voltage switching here. So I would say that activating the power supply to the LNB should be done automatically when the frontend is opened. As a workaround in VDR 1.3.6 I have added a call to ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13) when opening the device, but I think this shouldn't be necessary. Klaus -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.