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Message started by Nigel on Dec 4th, 2012 at 8:15am

Title: Re: Loss of UK TV channels
Post by Bunter on Feb 13th, 2014 at 2:49am
skyinmadrid.

ASTRA 2E TRANSMITTING AT REDUCED POWER TO EXCLUDE EXPATS?
Browsing through nearly 1,000 of your reception reports, it's clear that the new satellite Astra 2E is transmitting at lower power than its twin, Astra 2F.
Both Eurostar E3000 satellites have identical specifications: launch mass 6 tonnes, wingspan 40m, output power of 13kW. For some reason, the received signals are up to 2.5 dB lower across most of Europe, including SE England (right).
We were led to believe that the new satellites would have a stronger signal in the centre of footprint, but this only happened with Astra 2F, which went into service a year ago.
2.5dB doesn't sound like much, but the dB scale is logarithmic, a drop of 3dB is a reduction of 50%.
On both satellites, HD channels are transmitted at slightly higher power, as the DVB-S2 8PSK HD format is much harder to receive. This is reason why many people can receive SD but not HD.
The suspicion has to be that 2E's power has been reduced to make it harder to receive BBC, ITV and Channel Four in mainland Europe.

Astra2E-2F-comparison_.png (Attachment deleted)

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