Can you help me please? possible interference

4

4Himdj

Regular Member
My Satellite Setup
1.2 Laminas Dish
My Location
Rome
Heelo everybody I kindly ask for your help in this:

I live in Italy, I've perfectly installed a motorized system to my laminas 120cm dish

I can receive very very fringe signals like 54,9 east t2-mi trasponders, 42east turkey beam, 26east badr mena beam, 27,5west, all pretty low on my position (Rome)

Dish is perfectly alligned and all the try about this has been made to confirm it.

but
when I'm on 13east signal is very, very weak: some tp's have 8-9db!
in particular if i'm not wrong this happens specially from 12000/12500mhz tp
12303 V has 9,5db
12616 H has 8,2db
11096 H has 13,0db
10815H has 14,0db

similar situation on 16east
10972 V has 17,0db
11426 V has 17,0db
12643V has 13,0db
12717 H has 10,5db

it seems I have no other similar situation (maybe only on 19east but I need to check again) on other position

do you have any suggestion?
Is it an interference? If so how can be solved?
I've inverto black ultra single.

thank you very much
best regrads
 
I had one receiver (Humax Foxsat) that did not work well when used with an Inverto Black Ultra on strong satellites. In the end it was the Black Ultra overloading the receiver, using an attenuator to 'quieten' the LNB worked well.
 
ozumo said:
I had one receiver (Humax Foxsat) that did not work well when used with an Inverto Black Ultra on strong satellites. In the end it was the Black Ultra overloading the receiver, using an attenuator to 'quieten' the LNB worked well.
Click to expand...
If I use an attenuator will I decrease signal on fringe tp?
 
To be honest I don't know. If you have some spare parts you can try to attenuate the signal by adding a diseqc switch, looping through another receiver or increasing the cable length. At least they will give an indication if this is the actual problem.

What receiver are you using and how long is the cable?
 
cable lenght sincerely i don't know. dish it's on the top of the building, my house it's 2 floor below
receiver is ax hd 61
 
I see in your profile you have several receivers, do you get the same problem on all of them?
 
Also with the Inverto Black Ultra I recommend using a sun shade of some kind to protect the LNB from the sun, but that mostly affects weaker signals.
 
4Himdj said:
If I use an attenuator will I decrease signal on fringe tp?
Click to expand...

I would think not. It decreases signal STRENGTH, not signal QUALITY.
You can also get that effect by adding a length of cable to your present cable. So you can try that, to check if signal strength overkill really is the issue here.

Greetz,
A33
 
Change your Lnb to a Golden Media 201+ this will stop the over load on strong transponders @ 28.2E, 19.2E, 13E, & 30W,
But you will lose some weak signals on 26E, 21.6E & 7.3W ect ect.

FlySat Sat List

www.flysat.com www.flysat.com
 
Last edited:
I was wondering if you were simply putting too much signal into the system too & saturating the receiver. Hotbird 13E is putting 53dB into Italy - the power is so high its off the top of the flysat dish size charts!

1.2m is total overkill for your location

Capture.webp
 
The lower to the horizon the satellite is the more junk and ground clutter you will pick up.

Also in some cases the actual signal from the satellite will cause a drop in signal, if the satellite and dish are at just the right angles to each other (satellite low on the horizon) you can pick up an out of phase signal, (ground bounce) this signal is 180 degrees out from the main signal, this out of phase signal can cause a drop in signal strength, or a complete fade out of the main signal.

If this is the case then there is not much that can be done for a consumer type dish install.
 
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