New BBC TP - 11464H 22000 5/6

[Huevos]

This has replaced the previous RB service on 10773 H 22000

Yes, it closed several days ago.

 

[BLUEPLATINUM]

This TP is the strongest 2F TP in the Canaries. Great news for the many bars catering for holiday makers who thought their "big dishes" were now useless ! Sports coverage all summer !

 

[william-1]

22110 and 22120 is only one channel just a carry over from previous BBC tv that shared the same pids.

 

[mickwig]

Hi, I have a problem receiving the frequency despite the other spot beam TP's on that sat come in quite strong especially during midday. I have noticed that my old Panasonic 1 Gen. Skybox does hold out a lot longer than the new Samsung TV and the Panasonic HDR. So does my old 20 quit SD receiver.

Is it possible that the problems result from all the other TP's in the same band are quite strong (Europe beam) compared to the this one and if so, is there a way to filter out or dampen the strength of these TP's in order to get better reception?

 

[Pride Of Cucamonga]

Hi, I have a problem receiving the frequency despite the other spot beam TP's on that sat come in quite strong especially during midday. I have noticed that my old Panasonic 1 Gen. Skybox does hold out a lot longer than the new Samsung TV and the Panasonic HDR. So does my old 20 quit SD receiver.

Is it possible that the problems result from all the other TP's in the same band are quite strong (Europe beam) compared to the this one and if so, is there a way to filter out or dampen the strength of these TP's in order to get better reception?

Higher frequencies travel less far, which may have something to do with it.

 

[mickwig]

Higher frequencies travel less far, which may have something to do with it.

According to my Sat guy this frequency is not high enough (compared to let's say 11,053) to make such big difference. Plus - some post from Spain claims that this is the strongest TP on that bird.

 

[Lazarus]

It's possibly a little low in frequency to be affected by DECT phones (They normally interfere with 11532 in low band), but you never know: Turn off all your other electronic equipment nearby and see if the TP comes in. If so, restore items one by one until you find the offender.

 

[4wd]

Wondered where the rb's had gone. To my surprise am able to get 11464H, substantially stronger than other 2f uk beams.

 

[Huevos]

Higher frequencies travel less far, which may have something to do with it.

Is that a serious comment?

 

[Pride Of Cucamonga]

Is that a serious comment?

It's several hundred MHzs higher than the other spot beam frequencies, which may mean footprint is smaller and affect periphery. Anyway, was only a suggestion, no need to be rude.

 

[mickwig]

There's a post on another thread - I think it is the Canaries one - where a black ultra was exchanged for an Invacom C120 with Andrews feed (exactly my setup) and this TP went really bad. Unfortunately they don't do BU's as a flange version.

 

[Huevos]

It's several hundred MHzs higher than the other spot beam frequencies, which may mean footprint is smaller and affect periphery. Anyway, was only a suggestion, no need to be rude.

I don't see what is rude about asking someone if they are serious. You said "higher frequencies don't travel as far", and that is false. If it were true we wouldn't see stars that are more than 10 billion light years away (and these are magnitudes higher in frequency not just a few per cent). But now you've changed it to something about a footprint that was not related to your original comment or mine. Well there is nothing on the ground to suggest the footprint theory is true either and anyway even if it were the small amount of difference would be offset by the extra gain of the dish at the higher frequency.

 

[dxsat]

Is that a serious comment?

Rudeness such as this is the reason I no longer wish to post in this forum. I suspect I'm not alone.

 

[Huevos]

Rudeness such as this is the reason I no longer wish to post in this forum. I suspect I'm not alone.

Please explain what is rude about asking someone if they are serious. Blunt, maybe, but rude?

 

[Lazarus]

Mod. Note: Enough with the personal stuff, please. Any concerns are best addressed by using the Report feature.

 

[Pride Of Cucamonga]

I don't see what is rude about asking someone if they are serious. You said "higher frequencies don't travel as far", and that is false. If it were true we wouldn't see stars that are more than 10 billion light years away (and these are magnitudes higher in frequency not just a few per cent). But now you've changed it to something about a footprint that was not related to your original comment or mine. Well there is nothing on the ground to suggest the footprint theory is true either and anyway even if it were the small amount of difference would be offset by the extra gain of the dish at the higher frequency.

Ok, I could have worded it better, e.g. "higher frequencies are more susceptible to interference, which may tighten the sot beam further. " I never said I was an expert and only posed it as a possibility.

Anyway, differences aside, can you explain this extra gain at higher frequencies.

 

[Huevos]

can you explain this extra gain at higher frequencies.

Well, just looking at the receive dish on the ground for simplicity. Let's say that is a 1m dish. Gain figures for that dish at 65% efficiency will be as follows,

• 10.7GHz -> 39.1dB
• 11.2GHz -> 39.5dB
• 11.7GHz -> 39.9dB
• 12.2GHz -> 40.3dB
• 12.7GHz -> 40.6dB

Or looked at another way, a 1m dish @ 10.7GHz has the same performance as an 85cm dish at 12.7GHz. So raising frequency has the same effect as maintaining the frequency and increasing the dish size.

Same is true for the transmitting dish but how this affects anyone is going to depend how far they are off axis. Near the centre of the beam are higher frequency effect is always going to be stronger for a set input power. Then moving off axis there is going to be break-even point where off-axis effect cancels out higher frequency effects, and then further off axis the higher frequency effects are more than cancelled by the off-axis effects.

 

[Huevos]

Put simpler, the dish gain is will always be the same for a set dish diameter measured in wavelengths irrespective of frequency.

As wavelength goes up and down with frequency so would the physical size of the dish.

 

[Huevos]

CBBC HD now on this transponder and no longer sharing transponder space with BBC3 HD. Same thing has happened with the SD versions on other transponders.

Bit of a backwards move for the BBC putting HD channels on DVB-S muxes.

 

[Huevos]

BTW, BBC now have 7 transponders and 5 RB channels. Isn't that exactly the same number as they had before they started closing things "to save money"?