[m0aqc]

hi.

I am using the minitiouner v2 with a green 2 channel octogon lnb with 100cm offset dish. my problem is that the carrier lock fluctuates between 40% and 50%, and then drops to zero, then back to 40% to 50%. This results in video stopping, can anyone give me an idea as to what is going on please and how to fix it. thanks

[F6DZP]

Hello,

I can't answer. You give no information. What is the source? It can be simply a bad source...
First try must be made using a good source. Try to receive a Broadcast station as I show here : https://www.youtube.com/watch?reload=9&v=-WlHawgb8IQ
or try to receive the QO-100 Beacon.

take a screen shot and show us here the picture.

Jean-Pierre F6DZP

[m0aqc]

Hi Jean

I am receiving the beacon from es'hailsat. here are 2 photos.

[F6DZP]

Hello,

If I look at photo1, nothing is very strange, your carrier lock is 60%

When I was using some basic LNB (I don't remember the exact model), I had this result:

MinitiouneV0.9 Beacon ReportD5.jpg (409.81 KiB) Viewed 16348 times

Using a professional LNB I have now :

Minitioune receiving Beacon LNB pro.jpg (307.39 KiB) Viewed 16348 times

On this station, carrier lock is always 85% max, even If I use a good LNB and a good NIM.
There is a little default in the modulation I suppose, as I can receive other stations with 100% lock.

On the second photo the carrier lock is lower and so, your MER is too low to be able to receive.
MER low = noise or phase noise on the frequency.

I suppose that your LNB has some problem ( jitter? phase noise ?..) or you have interferences with this frequency or ???
( on month ago, in another city, I had some strange result with interferencies that were coming every 2 mn and it was impossible to receive during 1 mn, I discovered this issue using a spectrum analyzer)

You need to observe the spectrum at the output of your LNB.

Could you try to receive the Broadcast station from the same satellite, nothing to change in your equipment?
you have just to set:
SR27500 freq 11996 MHz DVB-S (NOT DVB-S2)

Jean-Pierre F6DZP

[m0aqc]

Hi Jean

Thankyou for your reply.

I noted your comment concerning monitoring the output frequency of the LNB and immediately I realised the problem.

I run a DMR repeater from my QTH TX 431MHZ, monitoring the TX causes the carrier lock to immediately drop out!!!.

Often the simplest answer eludes us, I didn't consider my repeater being the cause of my problem.

Thanks for your assistance.

Alan