channel 4 | |
 |
| | Thread Tools | Display Modes |
| | |
| |||||||
31-01-2007
| #51 | |||
| Specialist Contributor  Join Date: 13-02-2005 Location: near Limassol, Cyprus
Posts: 336
Thanks: 1
Thanked 10 Times in 8 Posts
My System: 3.1m Famaval on 28.2, 1.5m offset on 19.2e, 13e & 7e all mixed in a spaghetti of wires and going into a dream thingy. | 2 feeds plan.JPG 2 feeds profile.JPG 3 feeds.JPG
Hope that helps Cheers Nick | |||
|  |
|
31-01-2007
| #52 | ||
| Specialist Contributor  Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD | Thanx for the pics Nick Difficult to say but by the looks of it,the large feed is the same as the one i have on my dish...still i can only be 100% sure when i measure the diameter tomorrow... | ||
|
| |
|
01-02-2007
| #53 | ||
| Regular Member  Join Date: 12-01-2007 Location: cyprus larnaca/xylotymbou
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
My System: sky digital panasonic dsb40 | well the malloupas has lied to us then because they said its a 2.7 my dish is round and the lnb doesnt come into the middle if the dish its a little lower so is this a offset or prime focus?, some dishes i see the lnb is set right in center of the dish but mine isnt. | ||
|
| |
|
01-02-2007
| #54 | |||
| Specialist Contributor Join Date: 13-02-2005 Location: near Limassol, Cyprus
Posts: 336
Thanks: 1
Thanked 10 Times in 8 Posts
My System: 3.1m Famaval on 28.2, 1.5m offset on 19.2e, 13e & 7e all mixed in a spaghetti of wires and going into a dream thingy. |
cheers nick | |||
|
| |
|
01-02-2007
| #55 | ||
| Specialist Contributor Join Date: 22-06-2005 Location: UK: Kent. Spain: Madrid.
Posts: 629
Thanks: 4
Thanked 55 Times in 48 Posts
My System: Sky Plus V3 TDS 470n, Pace 2600CI, Thomson Sky HD, Technomate 1000D, Prodelin 1.8m dish + Invacom Quad C120, CM feed, Lacuna/Wolsey V3 meter | Sorry to hear that, I know it's no compensation, but this kind of deception is common round here, measuring dishes the long way and installing smaller ones than the customer has paid for. I have seen quite a number of people with 100cm dishes installed who believed they were 120cm ( and were charged for a 1.2 ), 1.7 instead of 1.8m, etc. You almost certainly have a 2.4m offset. | ||
|
| |
|
01-02-2007
| #56 | ||
| I do dishes,me.  Join Date: 23-02-2005 Location: Limassol,Cyprus
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
My System: big dish,sat box thingy,colour tv.and a remote control. | Mallouppas do not supply 2.7m prime focus dishes anyway.they do the 2.4 famaval and the andersen 2.4 offset | ||
|
| |
|
17-05-2007
| #57 | ||
| Member Join Date: 17-08-2005 Location: Israel
Posts: 52
Thanks: 7
Thanked 2 Times in 2 Posts
My System: 3.6M prime focus DH dish, Invacom Quad LNB, HD Digibox: 1.2M ChannelMaster offset with Invacom LNB and Echostar AD3000 | This is a very interesting thread as I have found that whatever I do to my setup in Israel I can't get Channel 4. I think that Badr 4 on 12169v is the culprit here. With my prime focus 3.6 dish the beamwidth is about 0.5 degrees. However, there are side lobes to the main point of focus with scalar feeds and I presume that because of Badr's signal strength these are being picked up. I am using a Seavey feed matched to the dish and even this has not helped. Incidentally there is a very low quality Channel 4 feed on 12129v. This is invisible to a Skybox but works in a FTA set with the right numbers from Lyngsat. | ||
|
| |
|
17-05-2007
| #58 | ||
| Specialist Contributor Join Date: 22-06-2005 Location: UK: Kent. Spain: Madrid.
Posts: 629
Thanks: 4
Thanked 55 Times in 48 Posts
My System: Sky Plus V3 TDS 470n, Pace 2600CI, Thomson Sky HD, Technomate 1000D, Prodelin 1.8m dish + Invacom Quad C120, CM feed, Lacuna/Wolsey V3 meter | I think the Badr theory was first raised by Zorba in January and is almost certainly correct. Any dish will have sidelobes and if the interfering signal is strong enough it will be received. There's absolutely nothing you can do about it. (Apart from move back to the UK, the usual daft reply from Digital Spy Forum members) | ||
|
| |
|
17-05-2007
| #59 | ||
| Specialist Contributor Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD | I still dont believe in this "badr" theory...If the geometry of the dish is OK and pointing at 28.2E,i dont see any reason why it should receive signal from a neighbour satellite.. I am also in Cyprus and i use a 3.0m prime focus dish...My channel 4 works 24/7 without any problems.. | ||
|
| |
|
17-05-2007
| #60 | ||
| Specialist Contributor Join Date: 22-06-2005 Location: UK: Kent. Spain: Madrid.
Posts: 629
Thanks: 4
Thanked 55 Times in 48 Posts
My System: Sky Plus V3 TDS 470n, Pace 2600CI, Thomson Sky HD, Technomate 1000D, Prodelin 1.8m dish + Invacom Quad C120, CM feed, Lacuna/Wolsey V3 meter | Sidelobes are a fundamental property of any antenna. See: http://www.geo-orbit.org/sizepgs/Noise.html#anchor4293062540 Scroll down to "sidelobe discussion" If you have a signal strong enough for a 60 cm dish entering a 4 metre dish it will be received and interfere with a weaker signal on the same frequency, even though the weak one is on the main beam. Don't forget Geoffrey is in Israel. | ||
|
| |
|
17-05-2007
| #61 | ||||
| Site administrator  Join Date: 26-07-2003 Location: Scottish Borders
Posts: 14760
Thanks: 7
Thanked 549 Times in 436 Posts
My System: Sky UK. FTA analogue & digital satellite from 5 fixed dishes (5E/7E/9E/13E/16E /19E/23E/28E) Pace MSS100, Echostar IP3000VA, Technomate TM-1000D, Dreambox 7020S  The last noble sat warrior to fly the olden flag of Analogue |
__________________ | ||||
| |
|
17-05-2007
| #62 | ||
| Member Join Date: 17-08-2005 Location: Israel
Posts: 52
Thanks: 7
Thanked 2 Times in 2 Posts
My System: 3.6M prime focus DH dish, Invacom Quad LNB, HD Digibox: 1.2M ChannelMaster offset with Invacom LNB and Echostar AD3000 | I notice that as the dish is swung west from the 28.2E position the 12168V peak, as seen on a spectrum analyser, rises a little while the adjacent peaks fall over the first few fractions of a degree movement. This is what would be expected if the Badr theory is correct. What remains unexplained is why Iceman has no problem - maybe his feed and dish have better side lobe performance. Where can I buy the big MP Sat feed? Last edited by geoffrey; 17-05-2007 at 09:28 PM | ||
|
| |
|
28-05-2007
| #63 | ||
| Specialist Contributor Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD | Yesterday i visited two identical 3.0m Andersen prime focus dishes in Nicosia...The first one belongs to a friend of mine and i replaced his old LNB and feed some time ago and aligned the dish for him...His reception has been excellent since then.No probs on Channel 4/SKY Two&Three or 11778V...His 2D is also working OK but he said,lately he started getting some blinks between 9.30-10.30pm (i have same behaviour on my 3.0m Channel Master these days) The second dish is on the same street and the owner happens to be a friend of the first dish so when he heard his dish was working better,he asked if i could have a look at his dish also.. When i got there,even before going on the roof,looking at the dish from the side i could see outer rim was not in a straight line.. I was told the dish receives 2D channels during the day but looses the signal in the evenings...No Channel 4 or SKY Two/Three.. The dish being in a very awkard position on a roof edge there was nothing i could do about the shape which was clearly not correct.. Measured the signal first,then replaced his old invacom C120 (grey case) which had a Local oscilator problem,fitted a wide adjustable feedhorn and adjusted the elevation slightly.. According to my signal meter the bit error on 2D signal had definately improved but no matter what i tried i couldn't get any signal from Channel 4 or SKY Two/Three without loosing 2D...I left it like that.. My point is....If the problem on channel 4 was caused by the similar frequency on Badr 4 why does SKY Three/Two or default frequency 11778V is affected? All these transponders are on Astra 2A North!! My theory is that,since the Astra satellites are apart from each other in space,in fringe areas such as Cyprus the dish geometry has to be absolutely perfect to be able to pick up signals from all of the Astra satellites.. | ||
|
| |
|
28-05-2007
| #64 | |||
| Specialist Contributor Join Date: 06-06-2003 Location: Famagusta District, Cyprus
Posts: 250
Thanks: 1
Thanked 1 Time in 1 Post
My System: Famaval 2.4m dish, Invacom 0.2dB LNB (single), Pace 430N |
do you mean "why is SKY Three/Two, or the default freq 11778V, also affected"? If so the answer (at my location anyway) is that they are NOT also affected. My problem, shared by many others, is that ONLY Channel 4 on 12168V is being affected (by BADR4 on 12169V). Regards, Geoff Cyorus | |||
|
| |
|
29-05-2007
| #65 | ||
| Member Join Date: 17-08-2005 Location: Israel
Posts: 52
Thanks: 7
Thanked 2 Times in 2 Posts
My System: 3.6M prime focus DH dish, Invacom Quad LNB, HD Digibox: 1.2M ChannelMaster offset with Invacom LNB and Echostar AD3000 | Its seems relevant to my problem with Channel 4 that I have no problem with 12480v (this usually has a Channel 4 test card) - and this is the only 2A north beam transponder that does not have a potentially interfering Badr transponder. | ||
|
| |
|
29-05-2007
| #66 | ||
| aka Skyman  Join Date: 13-06-2003 Location: Limassol, Sunny Cyprus
Posts: 1475
Thanks: 9
Thanked 34 Times in 32 Posts
My System: 3m(sky),1.8m(astr/hotbird),1m (nilesat)1m(arabsat)diseqc 4,sky plus,visionet 8000s. Satlook nit colour + Horizon hdsm. wii  | Iceman,have you worked with a 3m DH dish before? | ||
|
| |
|
30-05-2007
| #67 | |||
| Specialist Contributor Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD |
| |||
|
| |
|
01-06-2007
| #68 | ||
| aka Skyman Join Date: 13-06-2003 Location: Limassol, Sunny Cyprus
Posts: 1475
Thanks: 9
Thanked 34 Times in 32 Posts
My System: 3m(sky),1.8m(astr/hotbird),1m (nilesat)1m(arabsat)diseqc 4,sky plus,visionet 8000s. Satlook nit colour + Horizon hdsm. wii | Because the only difference between you and us(and our ch4 problems) is the dish you use.Maybe your channel master is better than my DH. I recommend you go and inspect a DH dish and "feel" the difference. Can you upload a pic or two of a channel master dish? Ps What is the focal distance? | ||
|
| |
|
01-06-2007
| #69 | |||
| Specialist Contributor Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD |
As i said i have not worked on 3.0m DH but as pointed out on my previous post the reason could possibly be not the size but the geometry of the dish not being perfect...(as my experience on two identical Andersens) Incidentally,are all the DH 3.0m dishes in your area suffering from this Channel 4 problem? and also do you also experience probs on other 2A North transpoders or is it just Chn 4? I was talking to an installer friend in Nicosia about this problem and he called a colleague in Paphos to ask his experience..he was told by this guy that 5 out of 8 DH 3.0m dishes he installed had this problem but 3 was OK...so there you go.  | |||
|
| |
|
01-06-2007
| #70 | ||
| aka Skyman Join Date: 13-06-2003 Location: Limassol, Sunny Cyprus
Posts: 1475
Thanks: 9
Thanked 34 Times in 32 Posts
My System: 3m(sky),1.8m(astr/hotbird),1m (nilesat)1m(arabsat)diseqc 4,sky plus,visionet 8000s. Satlook nit colour + Horizon hdsm. wii | I suspect its the geometry also,because some installations are better than others. If you come across a DH then you will see straight away.These dishes are spun ,and the surface is not smooth.Also,for some reason,the dishes are dissected and welded back together.But our dishes have the four back struts which we use to push/pull the dish to make it perfectly round( unlike the cheaper versions).But its not because of the geometry that we have this problem because its only this year that it started.I think that if the dish has a kink in a certain area then ch4/sky three are affected maybe because it causes a side lobe to pick up the arabsat interference.I can improve ch4 usually but a lot of the time the 2D signal drops so I have to find a balance and the customer prefers to sacrifice ch4. | ||
|
| |
|
01-06-2007
| #71 | ||
| Specialist Contributor Join Date: 13-02-2005 Location: near Limassol, Cyprus
Posts: 336
Thanks: 1
Thanked 10 Times in 8 Posts
My System: 3.1m Famaval on 28.2, 1.5m offset on 19.2e, 13e & 7e all mixed in a spaghetti of wires and going into a dream thingy. | Saw a 3m DH (short Focal length variant) yesterday, and with a 2600 hooked up the C4 was watchable but flickering. I didn't have time to hook up my spec annie to check, but I would be hesitant to change the settings as ABC1 was loud and clear indicating to me that the tune was spot on for 2D! Cheers Nick (back from Aldershot - at bloody last) Last edited by bignick; 01-06-2007 at 11:51 PM | ||
|
| |
|
02-06-2007
| #73 | |||
| Specialist Contributor Join Date: 13-02-2005 Location: near Limassol, Cyprus
Posts: 336
Thanks: 1
Thanked 10 Times in 8 Posts
My System: 3.1m Famaval on 28.2, 1.5m offset on 19.2e, 13e & 7e all mixed in a spaghetti of wires and going into a dream thingy. |
Nick | |||
|
| |
|
03-06-2007
| #74 | |||
| Specialist Contributor Join Date: 03-04-2003 Location: Kyrenia - NORTH CYPRUS
Posts: 612
Thanks: 0
Thanked 24 Times in 22 Posts
My System: 3.0m Motorised Channel Master 4 fixed dish SKY_HD DM7020s Vsat Kathrein UFS-910 HD |
| |||
|
| |
Linear Mode
