Labgear hdu641



Keywords: labgear hdu641
Description: I'll try not to waffle whilst covering the main points (hope this is the right section for this?). New aerial fitted on roof. Labgear HDU641...
I'll try not to waffle whilst covering the main points (hope this is the right section for this?).

  • New aerial fitted on roof.
  • Labgear HDU641 distribution unit fitted.
  • Only wish to distribute the new aerial signal around 3 tv's in the house (for now anyway) which will probably each be used for freeview.
  • New aerial has been proved to provide excellent terrestrial picture on furthest tv away from unit (and oldest piece of coax) and also picked up all the freeview channels on nearest tv with in built digital tuner. At this point the HDU641 wasn't installed.
So up to this point the new aerial is performing well with no amplification or distribution.

After installing the HDU641 however, i seem to be getting problems with signal/picture? The diagram below shows exactly how i have the unit connected.

The problem i have is that with this connected as shown, the terrestrial picture has vertical white bands and a fuzzy picture and the digital TV only displays very few of the channels with most reporting no signal.

After speaking with the Labgear helpline they seemed to think that the problem is that the original strong signal is going in to the amplifier and then being, well, amplified again and this is causing the problems.

I have proved that the unit is not faulty by plugging both tv's straight in to the DOWN LINK OUT and everything is fine with terrestrial and freeview channels. It is only when the aerial is sent through the UP LINK and out to the 4 outputs that the signal becomes poor.

Labgear suggested that i install an attenuator to reduce the levels but if i do that do i have to put it after the DOWN LINK OUT and before the UP LINK IN or after the TV OUTS (meaning i need an attenuator for each tv?).






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