[mythtvnz] New card, new LNB

[Nick Wallingford]

On 11/12/11 09:27, Noel & Diane wrote:
> -----Original Message-----
> From: Nick Wallingford<nickw at beekeeping.co.nz>
> Reply-to: MythTV in NZ<mythtvnz at lists.linuxnut.co.nz>
> To: MythTV in NZ<mythtvnz at lists.linuxnut.co.nz>
> Subject: [mythtvnz] New card, new LNB
> Date: Fri, 09 Dec 2011 08:45:07 +1300
>
> I recently added a TeVii S464 DVB-S2 card to my system's backend, and
> replaced the original 'plain' LNB with a "Dual Twin Output KU" LNB.
>
> Though I *did* have it all functioning for a time (which gives me
> confidence it can work) it was not consistent, and I'm re-configuring it
> all from the start again (for experience and hopefully better outcomes!)
>
> The S464 doesn't seem to get as good a signal as the existing S420s, but
> I think it is functioning OK.
>
> My question relates to setting up the LNB in MythTV, using the LNB
> Configuration Setup in mythtv-setup.
>
> The LNB came with instructions including:
> LNB Type - "Standard" if there is an lnb type
> LNB LO (Low or 1) - 10750
> LNB LO (High or 2) - 10750 or blank
> 22mhz - off
> LNB Power - On
>
> Am I right that in MythTV I effectively treat the LNB as if there were
> two of them?  That is, for the output that goes to existing S420 card,
> it is set up with Custom, Standard (Voltage) and set the LNB LOF (Low)
> to 10750, and then do pretty much the same for the connection to the
> S464?  (When choosing the LNB type Standard (Voltage) the LNB LOF High
> setting is greyed out).
>
> Nick Wallingford
> Tauranga
>
> Hi Nick
> You have made TWO changes.  Your LNB, and your card.  The new LNB may
> need it's focal distance from the dish tweaked, as it may well be
> different from the original LNB due to different internal construction
> parameters.  If you have a "squealer" meter this will be handy to adjust
> the LNB, working the meter as low down on it's scale as possible.  Once
> that's all set, then play with the card!
> Good luck
> Noel Claydon
> Kaikohe
>
>
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Thank you for that, Noel!

I'll get the ladder back up again this afternoon and have a go.  I do 
have a meter - el cheapo DSE - and did the best I could initially in 
alignment (knowing that I might well have bumped the dish, etc in LNB 
install) and also trying to sort out the skew.  Mine is of the 'it gets 
louder when the signal is stronger' type...

I was told the old "connectors coming out at about 8 o'clock as you look 
toward the dish" but noted an increase in signal when it was more up 
like 10 o'clock - that didn't seem right to me, so I've left it down 
closer to where the original LNB was skewed.

I get something like 86% signal strength when scanning using the new 
card and LNB, but no lock - that level of signal was giving me 
confidence it *was* all aligned correctly.

But as I say, you msg has given me renewed enthusiasm to do that up and 
down off the roof dance again...

Nick
Tauranga