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Trev – 10 minutes ago »
sha – 4 hours ago »
The aerial is high-gain, new coax, etc.
If you live in a very strong signal area, why on earth have you got a high gain aerial?
I dont, Redditch is in a dip & you lose a lot of channels from Sutton Coldfield unless you live 6 miles up the road where you are higher.
P.S. I also put the plastic pointy things on the top of the aerial to keep the pigeons off. works.
Thanks for the info, but I wasn’t actually replying to your post. I was replying to sha who has a hi-gain aerial in a strong signal area and thus his signal is too large so he has to attenuate it. ;
@Trev – thanks for asking ‘why on earth’
Let me try and explain although it does detract from the nature and spirit of the original post:
1. When installed the signal levels in our area were actually lower, which was before they increased the output of the Tx.
2. A good hi-gain aerial allows this: if you subsequently find the strength is too much it is far easier to passively attenuate (with no loss of quality whatsoever). Whereas if you find you are too low in strength then have to amplify (which introduces noise and needs a hi-bandwidth powered amp).
3. The cost of a standard aerial compared to a good hi gain one is minimal as the main cost is the cost of the installer visiting and going up the ladder, so it makes economic sense to install the best at the very beginning rather than installing one you may think is fine, only to find it is then too weak, because the installation will then have to be done again, doubling your overall costs.
4. A good signal allows you to use a small passive splitter (3dB typically) behind the PVR to split the incoming aerial feed to send 1 feed to the PVR and the other to the TV, rather than the TV using the RF output from the PVR, which can (but not always) introduce noise from the PVR’s built in amplifier.
The post I made was to indicate that the input to the PVR can be overloaded and cause it to give the intermittent fault, whereas the same signal level does not necessarily overload the TV input. The post was meant to simply assist others to attempt a cure and not have a detraction by going into economic reasons of choosing a specific aerial.
All valid arguments esp 2 and 4. The RFOUT from boxes invariably introduces noise, but whether that’s a problem is obviously dependent on the specific set up and the ‘raw’ signal strength. Thanks for your reasoning.
I feel certain that, in some instances, some peeps stick up a hi-gain aerial unnecessarily, and then run into tuner overload and the subsequent consequences thereof and also think that 100% signal strength is a ‘good thing’.
While viewing programmes through my Freeview box I have no problems, however when I record a programme I have a warning that the recording failed to record due to no signal. this warning disappears and the recording plays but is pixellated with distorted sound.
Any advice would be appreciated.
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