Tune Failed

[madaboutlotus]

Hi
My clone is giving me a 'Tune Failed' on certain stations but not all? I have changed the tuner for a new one but still have the same problem. I have rescanned the programme list and the tuner configuration looks OK, single fixed dish installation.
Anyone any ideas please.
Regards

[Detlef]

I get this too on an 800HD clone.

It seems as though the frequency lock is a bit poor on the clones and if the LNB local oscillator is a bit off then it will give that error on weaker transponders.

Tuning up and down on the channel select ofen brings it in.

Are you just using a single LNB configuration or a multi LNB one ?
If multi does it do it on al Sats?

[madaboutlotus]

I have a single LNB. I have noticed when I go on to the Satfinder section, sometimes the there is no SNR and the lock is un-checked. So that would seem to fit in with what you have found.

[dog-man]

Do you have a 'dect' cordless phone?

That can also make a receiver do this on certain frequencies.

To rule out a dect phone, switch off the power to the phone base (master) and see if the channel appears.




dog-man

[Detlef]

The DECT phone problem affects about six transponders. Assuming the user has a Uni-LNB then there is an explanation here (reproduced as the link didn't work properly):


The Sats we watch have freqencies of between 10700 and 12750MHz. This wouldn't survive a trip down the coax cable to the receiver so it is reduced (by a process called heterodyne, or to put it simpler, subtraction) in the LNB (https://www.goldwafers.co.uk/LNB-s/). Even then the frequency spread from the Sats (2000MHz) is too great for a receiver so a (uni)LNB (https://www.goldwafers.co.uk/LNB-s/) has two modes a 9.75 GHz and a 10.6 GHz local oscillator which gets subtracted from the Sat frequency such that the signal sent to the receiver lies between ~1000 to 2000 MHz (a spread of 1000MHz).

Most DECT phones operate at a frequency of 1880 to 1900MHz which lies in the upper range used by Sat receivers.

This means that Sat transponder frequencies of around 11640 and 12490 produce an LNB (https://www.goldwafers.co.uk/LNB-s/) signal to the receiver in the same part of the band as a DECT phones and whilst the phone signal is very small the LNB (https://www.goldwafers.co.uk/LNB-s/) output is even smaller so can suffer unless the phone and base station are kept well separate.

[madaboutlotus]

After changing the tuner to try and fix the 'tube failed' problem my channel scan which used to pick up nearly 1K services went down to 780 odd and now today it will only pick up 265?? What is wrong I ask. Is it the box giivng up, the tuner replacement is the same Alps rev M that came out, or the image??Anyone else had this problem.
Regards