freesat 003b 07f9 ch4/film4 poor signal

[supermoocow]

Got a 42PZ81 with built in freesat.
had dish installed and installer showed BBC HD then drove off.
Thing is all other channels fine with 60% Signal Quality, 100% Signal Strength

Channel 4 satellite not locked, Network ID: 003b, Transport Stream ID: 07F9
Film 4 satellite not locked, Network ID: 003b, Transport Stream ID: 07F9

Then had zone 2 dish installed.

Channels now 100% strength 75% quality.
Ch4/Film4 Strength 100% quality <50% sometimes no lock at all.

Had 3 tv's, tuned off set, reloaded listings, tuned off other equipment, new cable...

I think the guys setting it up are cowboys!
Is it worth me going and making minor adjustment to dish or LNB?
If so what do you recommend (I do not have sat reader only strength from receiver on TV).

 

[satelliteman]

Welcome,
It's unlikely that you have alignment issues as two dishes have been set up prevoiusly and you still have the problem. You may of had a bad installer of course who didn't do the job properly, who knows. Looking at the transponder trace on a spectrum alignment display would identify the problems but not many installers carry these.

You seem to have already replaced the cabling. Did the installer use the same LNb for both dishes. I ask because the chhanels mentioned are the lowest in the 'IF' band (10.714) ??

 

[supermoocow]

As far as I know its a complete new dish. Don't know which LNB is in it I will climb up tomorrow and have a look tomorrow if that helps?
What do I need to look for?

The guy used same kit to align so maybe the kit is off???

He says he has never experienced this issue before.

 

[satelliteman]

All I was thinking was if the same LNb was used that could explain it. It might of been a faulty one producing signal problems at the lowest freq: 964Mhz. If the LNb was replaced with the new dish then I doubt it's that.

 

[rolfw]

Although the IF frequency is not a match for a DECT phone, it could well be a faulty phone, if you have one, unplug the base station and move the handset to another room to see if the problem gets better.

 

[supermoocow]

Basically tried before turning off everything other than tv and moving dect phone unit (it was turned off).
1st install had broken lnb
2nd install was replacement lnb. All channels except ch4 etc.
Ch4/film4 would most of the time be no signal. Very ocassionaly would get broken signal.
They then tried humax box which worked
3rd install big sat dish. Can get ch4 most of time with breaking signal. Occassional signal quality increases (at this moment in time it is about 10% better even though raining). But most of time it breaks up.

 

[satelliteman]

Calling out a 'professional installer' with a spectrum meter should find and fix the problem.

 

[radar]

Basically tried before turning off everything other than tv and moving dect phone unit (it was turned off).
1st install had broken lnb
2nd install was replacement lnb. All channels except ch4 etc.
Ch4/film4 would most of the time be no signal. Very ocassionaly would get broken signal.
They then tried humax box which worked
3rd install big sat dish. Can get ch4 most of time with breaking signal. Occassional signal quality increases (at this moment in time it is about 10% better even though raining). But most of time it breaks up.

Could you be getting interference from a terrestial microwave link in the 10Ghz to 11Ghz band ?
Are there any microwave towers in the general direction of where the dish points ? BT used to use that freq band for 140Mbits links.

 

[supermoocow]

Ouch another £70 then
Just noticed I can't get anything on 003b 07dd I.e BBC news either

 

[satelliteman]

If it is microwave, moving the dish a tad lower or away from it's position may well be enough to sheild any interference. Microwave should be identifiable on a spectrum trace.