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All posts by Keith

Below are all of Keith's postings, with the most recent are at the bottom of the page.

I had a long period of 'no signal' condition for Freeview Channels 20, 21 and others this evening, Sunday 5th June. My post Code is NN6 9SH and due to my house orientation and location I have my aerial pointing NNE.
I believe this means I receive the Waltham Transmitter as I get the ITV Central news, BBC East Midlands etc. I did not find any Waltham Txer Maintenance or Fault status, no indication if only some Freeview Channels off air.

I cannot find any information about who you notify about loss of service, whether it is the Engineering Company who looks after the Transmitter equipment (dedicated to the specific affected Channels) or the company providing the data link for the affected Channel programmes to the Transmitter.

The reliance upon a Statement 'these Channels / Transmitters are monitored' is a failure to understand how Systems Engineering and Monitoring is carried out. If no alarm indication is generated staff are unaware. If they are aware of an alarm they may not know its' impact unless they investigate. It is not a 'fault' until it is reported.

Whatever is the response to the alarm status it should include an immediate update of the status of the affected Channels / Transmitter. This is supposed to be a 7 day service with (I assume) 24hr coverage to provide immediate rectification / restoration of service.

Please can you enlighten me and others on the above points, especially the Contact details for reporting Channel loss.


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There is a difference between 'Poor Quality' due to co-channel interference (which is often a combination of the interfering signal's phase, strength, aerial alignment factors) and the state 'No Signal'. Also the local transmitter's signal propagation range is affected by the ground and atmospheric conditions so weak signal areas loose the signal completely. Most users are able to access their Signal Quality / Reception displays on their Television which differentiate between the 2 signal conditions. Selecting an alternate Channel which is working from the same transmitter site proves the customer's aerial and the rest of your equipment is O.K and it is a reasonable assumption the fault lies with the transmission.
1. Can we not get an article from an engineer / technician who works on the transmitter equipment itself to explain the monitoring of service, how failure status is reported to the control room (SCADA systems etc) and what is the Service Contract demand for repair.
2. Who is in charge of the Transmitter Service fault reporting on this website and who sends in the information during normal work hours and 'out of hours' does this detail get updated on website. What is a better website for this information?
3. Formal contact details stated on website for 'loss of service' reporting on digital channels.
4. How does the lower power levels of the digital transmitters and their frequencies / channels get decided upon and who monitors the impact of atmospheric conditions leading to co - channel interference effects, often from other UK areas using the same channels. Where are these warnings published?

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