BUD Mesh size - How small must the mesh be to receive KU?
Jim
KU
LNB I have essentially unable to receive KU band signals on it. I
have in the past received some KU analog signals, but they were
extremely weak, right at the noise threshold. My dish is 10 ft.,
Analog receiver is Uniden Supra, DVB receiver is Pansat 2700A.
The shape of the open space in the mesh reflector is a trapezoidal
shape,
and I'm wondering now if the open area is too large for KU band
operation.
I receive all the C-band Analog (whats left), all C-Band DVB stuff,
but cannot receive any DVB KU band stuff, making me suspect the mesh
is too large to receive Ku signals.
I do have several separate small solid KU dishes, but would like to
receive certain signals on G19 on the BUD if possible to free up
the smaller dishes for other sats.
Anyway, can anyone set me straight on how to measure the mesh to see
if the thing should work with KU reception?
THanks...
SAC 441
allows for digital
reception.It has 3/16 inch tiny diamond shaped holes in the mesh
framework.It works fine with this kind of spacing in both DVB 4:0:0
format and DC2 operation.
SAC441
JAB
>Anyway, can anyone set me straight on how to measure the mesh to see
>if the thing should work with KU reception?
Ku Band Dish Antenna Compatibility
Iif you have a solid dish, you should have no problem converting from
C band, to Ku band.
However, with a mesh dish- if the "holes" in the mesh are greater than
a quarter inch, the chances of computability are not in your favor,
due to the fact that your dish won't reflect Ku-band signals properly.
Therefore, you'll want to strongly consider upgrading to either a
solid dish, or a mesh dish in which the hole size under 1/4", and
ideally you'll want a dish that is 1 piece (or at least very few
pieces); as 4 section dish is more optimal than an 8 section dish.
The fewer the sections, the more accurate your parabola shape is and
thereby the more difficult it is for your dish to become warped (the
smaller the number of seams- the better). And insofar as dish mounts
go, the H2H (Horizon-to-Horizon) dish mount is more desirable than a
polar mount.
This is due to the fact that the Ku-band demands that the dish antenna
system is well-targeted and able to closely follow the orbital arc, of
which the H2H mount does quite admirably, as compared to a polar
mount. Also, bear in mind that you will be adjusting both the azimuth
and elevation, which can be a bit tricky occasionally.
joeturn
I also read that the digital switch was another tecnological
blunder!!
I'de say by 2012 they will come up with a tecnological marval that
will reinstate anolog?
Nastrodumas:09:07:13
http://www.precisenetworking.com/~mcgatney/hdtv.html
Soo if your pansat 2700a is not compatible with ATSC you will need a
flash to convert it from NTSC and they called it nagra 3.
JAB
<joetu...@yahoo.com> wrote:
>I hear DC2 analog is on the verge of extention?
Until commercial interests switch to a more compressed format, DC2
will remain.
Its all about money...cost of new equipment vs cost of
sat-broadcasting.
But, when you compress more into one channel, it means those receiving
the signal need bigger dishes...which cost bucks.
Needless to say, during rain storms...head-ends better have a much
bigger dish when highly compressed signals are being received.
>I also read that the digital switch was another tecnological
>blunder!!
Not sure what you are talking about....I'm using a Satellite ISP, and
it works for me.
Over The Air SD/HD works fine for me also...but I need about a 40'
tower to get more than 2 digital network channels. Yes, during strong
electrical storms, blink goes the signal, like Dish/Direct does.
JAB
<joetu...@yahoo.com> wrote:
>I also read that the digital switch was another tecnological
>blunder!!
PS: This below is false today: Sixth generation of ATSC tuners work
just fine.
An Inconvenient Truth?
Let's also get this out of the way as soon as possible? In the
opinions of many, ATSC Digital TV Simply Doesn't Work Well. Digital
signals must come in at full strength, or they don�t show up on your
TV at all. Digital signals just don't travel over the air as well as
analog signals did; ATSC digital is inherently weaker?
SAC 441
----"I hear DC2 analog is on the verge of extention?"
----
Reply:
FYI: DC2 was NEVER analog.It is a digital proprietary encryption
transmission protocol developed for General Instrument Corp. who was
later acquired by Motorola for use in C-Band (BUD
or large dish) receivers.The expanded form is Digicipher 2.
Perhaps you are thinking of the analog cousin to
C-band encryption,which was VCRS or VC2+
or VideoCipher 2+.That is analog and yes for all intents and purposes it
has been discontinued for consumer use.
Do you mean "EXTINCTION" in the last word of your sentence question?
DC2 does not need an
"extention" per se,as it is still in use.
SAC441
joeturn
SAC441
My bad I was refering to vc2 and I dont know anything about
dc2 compression.
The post in the precisenetworking link was giving ASTC a bad rep and
sayin congress caused the FCC to opt that in for more eclectronic
manufacturing
in the US and not because it was better.
Sac could the converter box from digital to analog solve the NTSC
problem on the Pansat 2700a?
It now will only run NTSC OR PAL.
JAB
<joetu...@yahoo.com> wrote:
>The post in the precisenetworking link was giving ASTC a bad rep and
>sayin congress caused the FCC to opt that in for more eclectronic
>manufacturing
>in the US and not because it was better.
It is cheaper to broadcast in ASTC format...cheaper means cost to
broadcasters' transmitters.
OTA Broadcasters years ago were telling Congress they were loosing
their butts to Cable....so, they needed a better picture quality
format....digital was the solution.
Yes, Zenith and MIT have both made a bundle, along with others...but
Congress/FCC authorized the digital switch in order to have a better
picture quality for OTA broadcasters.
ASTC reception works fine...you just need a sixth generation or so
ATSC tuner in your HDTV set.....its true, its all or nothing...but I
live out in boonies, and reception has always sucked, unless you have
a tall tower.
joeturn
You might put one of these on a rotor and be happy?
joeturn
Well I appreciate the reply but while I was waiting a responce and
practicing my spelling,I acquired a dtv converter box just for
testing ! It does wonders for the vhs but I'm scared to plug in the
Pansat 2700a as the Sat box sends voltage through the coax to the lnb.
This voltage may bite my little box as I understand the converter must
be between the lnb and the sat box for the conversion!
Any info on how to make it work would be greatly appreciated! Maybe
just put the $10.00 worth of parts inside the pansat at some point
where it will only be affected by the IF? TIA
joeturn
salution to better broacast and be competitve with cable and satellite
then ATSC has almost shut them down and driven the over-the-air (free
local viewers) to subscribe to either cable or sat!
I think the Governments influence for digital was for capital gain
since they now are pushing the sat tax.
$$$$$$$$$$$$$$$$$$$$$$
UCLAN
I think you are clueless and need to get back on your meds - fast!
JAB
<joetu...@yahoo.com> wrote:
>ATSC has almost shut them down and driven the over-the-air (free
>local viewers) to subscribe to either cable or sat!
OTA broadcasters wanted digital broadcasts....for a better signal.
ATSC works fine for me...and I tune in two distant stations, btw. You
do need to get the right antenna, if you can receive them in your
area.
Here, put in your Zip Code in form below
joeturn
>
> - Show quoted text -
UPDATE UPDATE
Well I just thought about it a minute.
Now I must get another digital convertor.
Go inside it and make a trace cut and solder in 2 diodes.1 preventing
the current from getting to the converter board and a second to allow
the output voltage to bypass the circuit board.
That a bunch for uclans perfect instructions and Jab trever marshals
dish mod with give a tremendous db gain over the mesh type arials!
Seems the solid metal reflecter surface gathers lots more signal and
sends it to a focal point,where it is received by the modified lnb
that sends this concentrated signal to your tv!
Thanks goes to Uclan once again his genous has overwhelmed ..
UCLAN
> Thanks goes to Uclan once again his genous has overwhelmed ..
As have your punctuation and spelling.
M.M.
> Thanks again UCLAN!
> My mind works on salutions not on grammer ,but thanks to your hangup
> people will not have to decipher my post for themselves!
>
>
> Thanks a bunch for Uclans perfect instructions .
>
> Jab
>
> Trever Marshals
> dish mod will give a tremendous db gain over the mesh type arials!
>
> When RF current hits an object it causes the objects atoms to act like
> a magnet!
>
> The better conductivity and less resitance to electric current it has,
> the better the collector/reflector.
>
> The solid metal dish will out perform a solid fiber glass dish of the
> same size because of its conductivity
> and the magnetic field that it produces is much greater than both the
> fiber glass and the bow tie antenna,
> because of the metalic surface area, thus making a small meshed dish
> better than a large meshed dish.
>
This is total bullshit...
deadguy3
> joeturn wrote:
>> [25 quoted lines suppressed]
>
> This is total bullshit...
my fishing net works fi
joeturn
>
> - Show quoted text -
m m you got banned because you underestimated the power of wisdom!
Now take notes next time!
It is better to be thought stupid, than to open ones mouth and remove
all dought!
Tis true RF curent affects a metal object same as an electric field in
a coil will make a magnet out of a nail if passed thru it's field.
RF current captured by an antenna can be converted to AC current same
as the magnetic field being broken in generaters produces RF and AC!
I have just sooo busy Ihave not told anybody else but you guys<I;-)
joeturn
My mind works on salutions not on grammer ,but thanks to your hangup
people will not have to decipher my post for themselves!
Thanks a bunch for Uclans perfect instructions .
Jab
Trever Marshals
dish mod will give a tremendous db gain over the mesh type arials!
When RF current hits an object it causes the objects atoms to act
like
a magnet!
The better conductivity and less resitance to electric current it
has,
the better the collector/reflector.
The solid metal dish will out perform a solid fiber glass dish of the
same size because of its conductivity
and the magnetic field that it produces is much greater than both the
fiber glass and the bow tie antenna,
because of the metalic surface area, thus making a small meshed dish
better than a large meshed dish of the same size,however
wind load must be considered and a sacrafice of signal might be
required!
I had to add this last sentence for MM
joeturn
Well alrighty then, if you spray paint it with a metalic finish it
will work even better!
Might even catch more fish as if they get that close ,it will reach
out and grab them and they wont be able to escape its magnetic pull.
UCLAN
> It is better to be thought stupid, than to open ones mouth and remove
> all dought!
Which *you* seem to do on a regular basis? "Dought" ???
joeturn
DOUBT
How about this video contradicting laws of phisics?
UCLAN
> The solid metal dish will out perform a solid fiber glass dish of the
> same size
Who wants to break the news to this moron that a fiberglass [one word]
dish is nothing but a metallic dish with a fiberglass protective coating?
The metal inside a fiberglass dish might be either solid or mesh, resulting
in varying performance in different frequency ranges.
joeturn
What a waist of fiberglass when reception only is needed( wave lengths
or not cruicial) the bigger the better??
Did you know the Government wont allow free energy Uclan says its not
cost worthy?
Look at morrey's antenna producing electricity 50,000 volts for free
using only capacitors!!
tymt...@gmail.com
Nobody would have alternating current electricity without Tesla ,and would have huge direct current cables running everywhere and only the very rich would be able to afford DC electric bill.
Sadly Nikola Tesla died a poor man with many ideas even better than AC electricity that will never be used by the general public because they can't be billed for like wireless electricity derived from the friction of Earth's rotation on the vacuum of space.