View Full Version : What you need to pick up c band FTA
iluveitall 07-16-2006, 10:40 PM Because of the low power of c band signals you need a larger dish than you do for KU. While I have had success picking up a couple of c band signals on a 1.2 meter dish (asn on f1 for example, no cross pol problems), you really need at least a 6 footer to get a fair chunk of c band DVB broadcasts. To reliably pick up c band stuff you need an 8.5- 10 foot dish. Dont get me wrong, if you can find a 6' dish grab it, you can still get plenty of good programming on a 6' dish.
8.5' is the minimum size to ensure 2 degree compliance. What "2 degree compliance" means is this: Sats are spaced at a minimum of 2 degrees across the clark belt. If 2 sats are broadcasting on the same frequency/ polarity right next to each other, with a dish under 8.5 feet you will get cross pol interference, which can make those signals unwatchable.
A classic example of cross pol interference can be seen on KU 123 (g10) frequency 11720 vertical. DN has a tp at 121 (e9) that is at 11724 vertical. The DN signal is a lot stronger than the signal on g10, which, because the sats are so close and the frequencys are so close, lowers the SQ of the g10 signal.
You are going to need to have a way to move the c band dish, and a way to control the polarity of the c band LNB. First lets talk about moving the dish. There are a couple of ways to do this. You can "slave" a DVB reciever to an analog/4dtv reciever. If you slave your DVB reciever to an analog/4dtv reciever, then both dish positioning and polarity are controlled by the analog/4dtv. You need to change sats and change polarity with the analog/4dtv.
You can also use a vbox II (by moteck) diseqc positioner, this accepts diseqc commands from your DVB reciever and tells the dish how to move. I would NOT recommend the vbox (dp 710) which is really a piece of trash.
If you use a vbox II your DVB reciever can control dish movement. Then you are left with how to control polarity. Some of the pansats can control a polarotor, which is how most BUDS change polarity. If you dont have a reciever that can control a polarotor than you can used a voltage controlled c band LNBF. With a V Box II and a voltage controlled LNBF your DVB reciever can totally control your BUD.
You can also set up a BUD to pick up both c and ku bands. One way to do this is that you would use the equivalant of a corotor which has both c band and ku LNBS. You will need to either slave the corotor to an analog/ 4dtv reciever, or have a reciever capable of running a corotor.
The other way to control polarity is to use a c band/ ku band voltage controlled LNBF. There are a couple brands of these LNBFs on the market right now. These are a compromise and do not give you the best of ku signals, nor the best of c band signals.
With a c/ku BUD and a good line of site to the clark belt, there are literally hundreds of good, "true" fta channels available. Another nice thing about c band is rain fade is almost never an issue because of the long wavelengths that c band uses.
Hope this helps someone out.
acs33 07-16-2006, 11:07 PM great job i'm sure it will help out a lot
pappapump 07-16-2006, 11:18 PM Needs to be stickied.
speaking of stickies, have you ever tossed your underwear at a wall?
Cadsulfide 10-16-2008, 02:08 PM Great Post! I like my BUD!
jftheo 10-26-2008, 09:21 PM Thks for The infos
This article has some good infos , thks .
Because of the low power of c band signals you need a larger dish than you do for KU. While I have had success picking up a couple of c band signals on a 1.2 meter dish (asn on f1 for example, no cross pol problems), you really need at least a 6 footer to get a fair chunk of c band DVB broadcasts. To reliably pick up c band stuff you need an 8.5- 10 foot dish. Dont get me wrong, if you can find a 6' dish grab it, you can still get plenty of good programming on a 6' dish.
8.5' is the minimum size to ensure 2 degree compliance. What "2 degree compliance" means is this: Sats are spaced at a minimum of 2 degrees across the clark belt. If 2 sats are broadcasting on the same frequency/ polarity right next to each other, with a dish under 8.5 feet you will get cross pol interference, which can make those signals unwatchable.
A classic example of cross pol interference can be seen on KU 123 (g10) frequency 11720 vertical. DN has a tp at 121 (e9) that is at 11724 vertical. The DN signal is a lot stronger than the signal on g10, which, because the sats are so close and the frequencys are so close, lowers the SQ of the g10 signal.
You are going to need to have a way to move the c band dish, and a way to control the polarity of the c band LNB. First lets talk about moving the dish. There are a couple of ways to do this. You can "slave" a DVB reciever to an analog/4dtv reciever. If you slave your DVB reciever to an analog/4dtv reciever, then both dish positioning and polarity are controlled by the analog/4dtv. You need to change sats and change polarity with the analog/4dtv.
You can also use a vbox II (by moteck) diseqc positioner, this accepts diseqc commands from your DVB reciever and tells the dish how to move. I would NOT recommend the vbox (dp 710) which is really a piece of trash.
If you use a vbox II your DVB reciever can control dish movement. Then you are left with how to control polarity. Some of the pansats can control a polarotor, which is how most BUDS change polarity. If you dont have a reciever that can control a polarotor than you can used a voltage controlled c band LNBF. With a V Box II and a voltage controlled LNBF your DVB reciever can totally control your BUD.
You can also set up a BUD to pick up both c and ku bands. One way to do this is that you would use the equivalant of a corotor which has both c band and ku LNBS. You will need to either slave the corotor to an analog/ 4dtv reciever, or have a reciever capable of running a corotor.
The other way to control polarity is to use a c band/ ku band voltage controlled LNBF. There are a couple brands of these LNBFs on the market right now. These are a compromise and do not give you the best of ku signals, nor the best of c band signals.
With a c/ku BUD and a good line of site to the clark belt, there are literally hundreds of good, "true" fta channels available. Another nice thing about c band is rain fade is almost never an issue because of the long wavelengths that c band uses.
Hope this helps someone out.
jftheo 10-27-2008, 09:14 AM 1)Can we use the C Band Dish with appropriate LNB on a Viewsat receiver ,???
2) how do you solve the problem of fixing the Lnb on the c band dish ? would like an insight asap thks
Dutch1 10-27-2008, 09:40 AM Hi, On Cband does it need one of the vidiocypher II modules to work.Also is there a spot to get the sat's and ark angle.
2easy 10-27-2008, 10:22 AM Was thinking of playing around some,I have a meter dish (from old CC company) Anyone play with these?
mankar12 10-27-2008, 07:46 PM A buddy have a texas instrument 4dtv installed that states that is c/ku band . Is a digicipher with the 10 footer dish. We connect a cw 600 to it and the lnb did scan some channels using the 4dtv to move the dish. I was in a hurry so I didn't check if was video or not.Here is my question : On the menu only shows letters and 4 digits numbers for sat and possition and he doesn't have the manual. Do the lnb will work for Amazonas? How or where I can find the 4 digits numbers for Amazonas? Thanks. Manny.
jimdodd 09-11-2009, 07:35 AM I'm in Toronto Canada,
I have a Fortec Lifetime Ultra FTA.
My dish is 58in. wide and 70in.length.
I'm trying to get RFD-TV on AMC 1 C band.
Can i do it and what C band LNB do i need i get?
el bandido 09-11-2009, 08:12 AM I'm in Toronto Canada,
I have a Fortec Lifetime Ultra FTA.
My dish is 58in. wide and 70in.length.
I'm trying to get RFD-TV on AMC 1 C band.
Can i do it and what C band LNB do i need i get?
http://www.lyngsat-maps.com/maps/amc1_c.html
You should be able to get this channel with that dish. I checked the channel and it is still there.
You need a C band lnb. Almost any one will work, but you have an offset dish by the specs that you have presented, so you will need a conical scaler ring for your C band lnb.
It would probably be best to start your own thread if you need more help or have more questions. EB
jimdodd 09-11-2009, 08:16 AM el bandido
thanx very much...
curious cat 09-11-2009, 02:55 PM http://www.lyngsat-maps.com/maps/amc1_c.html
You should be able to get this channel with that dish. I checked the channel and it is still there.
You need a C band lnb. Almost any one will work, but you have an offset dish by the specs that you have presented, so you will need a conical scaler ring for your C band lnb.
It would probably be best to start your own thread if you need more help or have more questions. EB
Sorry el Bandido if this is not done right, but since we are in the topic of receiving FTA, I'm trying to receive RTV on AMC 9, both Lyngsat and Sathint say RTV is on 11735 TP1 on AMC 9, 83W orbital location. coordinates EL 32deg az 114. with a 32 " dish and linear Lnb set up to Universal 9750-10600. I get a strong signal Q on 12140 V SR 30000 (Q of 90) but nothing on 11735 H symbol rate 4444 as per lyngsat, . I can't understand why no signal on 11735 and a lot of signal on 12140? The FEC on those transponders are different, one is 3/4 the other is 7/8 .could that be the reason? I thought the receiver had an auto detect FEC decoder. Using a Pansat 2500A. Any ideas? Thanks.
el bandido 09-11-2009, 03:26 PM Curious Cat, You do not say where you are located. The 11735 tp is weak so you probably need a bigger dish, depending on your location.
You can also try to adjust the dish that you have or adjust your lnb skew.
I get a weak, watchable signal on that tp with a 30 inch dish here in Atlanta, but I do not have any problem with it on a four foot dish. Atlanta is in one of the the hotspots for most satellites in North America. EB
Lute47 09-11-2009, 04:13 PM Thanks, very good info
reachkuma 09-15-2009, 07:21 AM Do you know what is the strongest TP I use on my C band 76cm dish in Minnesota? I have tried most option using LNB universal TP: 10750 but no luck. This used to work before but when I take it down for remodeling, now I can't seem to pick up any signal.
Thanks for any input.
el bandido 09-15-2009, 07:29 AM Do you know what is the strongest TP I use on my C band 76cm dish in Minnesota? I have tried most option using LNB universal TP: 10750 but no luck. This used to work before but when I take it down for remodeling, now I can't seem to pick up any signal.
Thanks for any input.
I doubt that you get C band to work on a 76cm dish. For best results,start a thread on your problem.
aussieboy 09-15-2009, 03:41 PM Do you know what is the strongest TP I use on my C band 76cm dish in Minnesota? I have tried most option using LNB universal TP: 10750 but no luck. This used to work before but when I take it down for remodeling, now I can't seem to pick up any signal.
Thanks for any input.
You CERTAINLY can't get C-band with a LO of 10750 on any lnbf. You've got something confused here. General minimum requirement for C-band is a 6 foot dish, with lnbf designed for Prime focus ( LO generally 5150) .
Larger dishes are better .
:)
reachkuma 09-16-2009, 12:34 PM You CERTAINLY can't get C-band with a LO of 10750 on any lnbf. You've got something confused here. General minimum requirement for C-band is a 6 foot dish, with lnbf designed for Prime focus ( LO generally 5150) .
Larger dishes are better .
:)
sorry, I do have 96cm dish which I used in the past to get c -Band international channels. I remodeling my garage and have to take it down. Now when I try to put it back up, I can't seem to get signal using the same setting as i have before. I also have tried to do manual scan and select each TP then move my dish around to see if I can get signal. But no luck that's why I wonder if anyone knwo IF there a strongest signal I can add to the TP to get the signal manaul. Thanks. I do appreciate the time for all the reply.
el bandido 09-16-2009, 01:09 PM "What you need to pick up c band FTA" Is the title of this thread, Not "I screwed up and need some help".
Start a thread on your problem and we will help you. EB
tbirdsatx 09-18-2009, 02:11 AM You could try some respect
gonziva 11-07-2009, 11:04 AM Q: I have a Viewsat 9000HD and I am in Miami, can I view free channel from Brazil using C-Band channles? If so, would a 36" dish with a C-band LNB be good enough? Your help is appreciated.
el bandido 11-07-2009, 11:19 AM A 36" dish is too small for C band. You will not get much if anything with it.
jag616 11-07-2009, 07:00 PM This makes me wonder I have a 40" primestar dish with ku lnb Im gettng a normaly subscribed channel (dont want to say what or it will be gone tomorrow)
But after looking at lyingsat and the available channels via Cband and KU I dont see any reason to go C band or BUD or am I missing something ?
gonziva 11-14-2009, 09:14 PM Check this site " http://www.dishpointer.com ", it helped me alot. Good luck..
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