Customer has bought new Digital TV.Its not working on present antenna.(either crusty old one or they never had one ,only rabbit ears)
You put your meter on the antenna lead and confirm that the signal is no good.
You install new digital antenna ( designed for the channels only that is available from the desired transmitter)Obviously you know what you are doing and are not a cowboy.
Ch BER <2E-05 all channels
DCP 60-65 dBuV all channels
No out of band signals greater that 50dBuv
Perfect !! Text book signal .
You plug it in only to find that one or more channels are braking up or "no signal " ( if it will tune at all )
You re-check with your meter and yes its perfect ,it should work .You even plug in a STB and it works perfectly.
Out of desperation you attenuate signal and find if you wind it down to around 50dBuv or even lower it all starts working .
Do you tell customer that in your opinion "this TV is not up to spec (a piece of ****) and they should get it looked at under warranty ( knowing that its likely to sit at a repair shop for 6-8 weeks and likely to be bounced back "no fault found -get your antenna checked" )
OR .. Do you just fit an attenuator and say "I think this set is faulty" explain the likely scenario of trying to get it repaired and suggest they just go with the attenuator and hope it doesn't get any worse
OR ... fit the attenuator and say nothing
Occasionally I am finding this problem .
Now we all know that TOO MUCH signal is an issue ( generally above 80dBuV ) but where do you draw the line and decide that a particular device is faulty ??
50dBuv ,55 dBuv ,60dBuv ,65dBuv,70dBuV even ?
I have seen some STB's that can handle almost 100dBuV without any issues so why are some TV's sooo touchy ??.
Having also been a workshop tech I have seen the other side of things too.
Often workshops have many outlets splitter after splitter and insufficient signal levels at multiple outlets and this sort of fault would not be picked up in a typical workshop setup. SAD BUT TRUE .
(In analog days it was preferable to have a borderline snowy ( weak) signal so that issues such as broken tuner connections etc would show up where as a strong signal would mask these things)
You plug it in ( the suspect Digital TV) and all channels work OK ,you put it on test and after several hours conclude that its OK .( so its most likely a fault at the customers place).warranty claim form filled in . Next job please
How are other installers seeing this issue?
Edited by bellotv, 15 July 2010 - 10:20 PM.