I have the same problem as found on this board I’m using a Duo monoblock Quad lnb for astra 1 and astra3

Only the Change of the LNB is too slow, I have to click on a channel from another LNB a second time after some seconds to provide it. Channel-Change at the same LNB works with one click without a problem.

This is what Juergen answered

DiSEqC control needs some extra time, but normally this should not exceed half a second.
Try to play with the 'distinguished by' settings, there are just four possible combinations.
If this won't help, try to activate option 'refresh channel if lost signal'. By this ProgDVB will repeat the procedure automatically if failed.

Play with the 'distinguished by' settings have no results

Try to activate option 'refresh channel if lost signal, then I’m not able to open a channel at all at the new chosen lnb

Anyone with other options

What DiSEqC method does this monoblock need, exactly?
Does this work with other DVB software?

What version(s) of ProgDVB?

I’m using version 4.89.0.6

I don’t now what DiSEqC method this monoblock needs my other S-tuners have the option
A-A for Astra 1 and A-B for astra 3 this works fine

There is not such option in progdvb so I configured option “1.0 or 2.0” and lnb 1 on astra 1 and lnb 2 on astra 3
The other two not connected, channel scan works fine

I have also tried the mini DiSEqC option no difference

A-A and A-B let me think, position bit / switch stays at A and option bit / switch changes.
Translated to normal DiSEqC 1.0 this means, positions A and C resp. first and third LNB have to be addressed.
Simple DiSEqC resp. toneburst only addresses the position switch, which seems to not be used on your LNB.

As your monoblock only has two LNBs inside, you may even try the fourth LNB as second position, should work the same way then.

However, many DiSEqC switches would start ignoring toneburst signals once a real DiSEqC signal is read, up to the next full power down. This is part of the DiSEqC specifications by eutelsat
http://www.eutelsat.org/satellites/4_5_5.html.

first and third LNB have to be addressed.

i tried this but can't scan the channels on the third lnb (astra 3) now

Juergen wrote:As your monoblock only has two LNBs inside, you may even try the fourth LNB as second position, should work the same way then.

Just try out.

BTW, there is a chance, your LNB switching may not work at all.
To find out, proceed as follows:

- first make a full safety copy, to be able to go back at any time
- set the first / working position to a false bird
- set one of the others after the other to the position your first LNB in fact is pointing to, scan, repeat with the next one

If you can scan the first position even on every other position with identical results, you don't switch at all. because switching elsewhere to automatically also means switching the original position off.

A few transponders may even give results on a false bird, but surely the stations would be completely different. If in doubt, check listings at satcodx.com
Technically, specially the positions Astra 19.2°E and Astra 28.2°E have several quite similar transponders, due to compatible birds. But there's not even a single identical station.

So now, if the scanning does NOT give the same result on one or two of the other DiSEqC positions (AB / BA / BB resp. B / C / D), that is / those are what you have to chose (from) to use for addressing the second real LNB.
If you can switch off, you just have left to find out, where to it goes.
Means, if you can't find out the straight ahead way, try to falsify the opposite

Jeurgen thanks for the reply
I almost gave it up but now it works

This is what happened

If you can scan the first position even on every other position with identical results, you don't switch at all.

I had to choose for the custom option end then diseqc 1.1
at the first LNB ASTRA 19.2°E and at the second LNB ASTRA 28.2°E

Reads like the switch is working as uncommitted.
Very unusual for the must be last one in a chain.
But as long as it works for you...