Re: BBC Radio on Astra and CX2388x-based receivers
Bill Wright
"Paul Martin" <p...@zetnet.net> wrote in message
news:slrnfs3d...@thinkpad.nowster.org.uk...
>> Transponder is number 13 (11.953GHz H). The working card reports a lock
>> on 11.950526GHz, which seems low to me.
>
> I've just confirmed this effect using a dish 150 miles away from the
> original one. Again, all other transponders are fine, just the BBC
> Parliament and BBC Radio one is showing a very high BER.
I've not been following this, but I've just had a look at tsp 13 and I can't
see anything abnormal. Have I missed something?
Bill
Bill Wright
> In article <WsqdnfBpWqrFTVza...@pipex.net>,
> very confused (probably so wideband a front end that it's trying to
> make sense of the next transponder down too). The common factor is the
> chipset in the struggling kit, whereas a PCI card that doesn't use that
> chipset is happy with that transponder.
The analyser shows a nice normal gap between this mux and the ones above and
below it. It appears to be exactly where it should be. A 3MHz offset would
be very visible. Just to make it clear to myself I moved the frequency
markers by 3MHz and if the mux were where they indicate it would be well out
of place. I'm not commenting on absolute frequencies because LNBs do vary a
little bit.
Bill
Bill Wright
> In article <gvmdnS8DVZtnk1_a...@pipex.net>,
> Bill Wright wrote:
>
>> The analyser shows a nice normal gap between this mux and the ones above
>> and
>> below it. It appears to be exactly where it should be. A 3MHz offset
>> would
>> be very visible. Just to make it clear to myself I moved the frequency
>> markers by 3MHz and if the mux were where they indicate it would be well
>> out
>> of place. I'm not commenting on absolute frequencies because LNBs do vary
>> a
>> little bit.
>
> 3-4MHz below the expected one, but all the others are within a hundred
> kHz or so of the expected frequencies. I wonder what's different about
> that transponder. 11.102GHz isn't allocated yet, so I can't tell
> whether it's a problem at the IF stage (1352MHz).
>
> The strange thing is that there wasn't a problem with this until
> Christmas Day...
Very strange.
Bill
Paul Ratcliffe
> In article <gvmdnS8DVZtnk1_a...@pipex.net>,
> Bill Wright wrote:
>
>> The analyser shows a nice normal gap between this mux and the ones above and
>> below it. It appears to be exactly where it should be. A 3MHz offset would
>> be very visible. Just to make it clear to myself I moved the frequency
>> markers by 3MHz and if the mux were where they indicate it would be well out
>> of place. I'm not commenting on absolute frequencies because LNBs do vary a
>> little bit.
>
> That's most odd. For some reason, the lock frequency is consistently
> 3-4MHz below the expected one, but all the others are within a hundred
> kHz or so of the expected frequencies. I wonder what's different about
> that transponder. 11.102GHz isn't allocated yet, so I can't tell
> whether it's a problem at the IF stage (1352MHz).
I agree with Bill. I had a look using the 1.4m dish on my uplink truck this
morning and the centre of the modulated signal is exactly where you'd expect
it to be and is right between the adjacent carriers.
Mark Carver
> Got an odd one here. I have two digiboxes (Sony and an Amstrad DRX-100)
> and three DVB-S PCI cards.
> The common factor is that the CX2388X-based cards are showing excessive
> bit errors (and carrier lock drops) on that transponder that nothing
> else shows. I've a quad LNB, and have swapped the outputs over to no
> effect, swapped the PCI cards between PCs, etc, etc. The other card has
> a FlexCopII chipset, and is unaffected.
>
> Transponder is number 13 (11.953GHz H). The working card reports a lock
> on 11.950526GHz, which seems low to me.
FWIW I've been listening to BBC R2 on t/p 13 this morning on my Panny DSB-31
Sky Box and been getting regular break up. Signal Strength/Quality are 100/95%
(according to the receiver's own bar graph). LH 65cm dish with Quad LNB.
--
Mark
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