| Author |
Message |
Guest
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 Posted:
Thu Sep 01, 2005 12:08 am Post subject:
c-band receives only vertically polarized channels |
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hi,
I have recently bought a 90cm c-band offset focus dish .Using this i
have tuned to asiasat3s and can able to receive some channels. But my
problem ican receive only channels with vetical polarized channels ,
the channels frequency ending with H cannot be received but not V.
Should i have adjust the scalar ring?
Regards,
vasanth |
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Valdivar
Guest
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| Posted:
Thu Sep 01, 2005 12:08 am Post subject:
Re: c-band receives only vertically polarized channels |
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A 90 cm(!) dish is hardly for C band!Are you sure you got your figures
right?ie: Many of us have 90 cm and 1M ku band offset dishes -for ku band,of
course.
Having said that,IF you are trying to use this dish with C band(less than a
6 ft dish is not possible and in many places a much larger dish is
needed!),with a C band (3.7-4 Ghz) lnbf...
btw: an lnbf electronically adjusts the skew,therefore the c band receiver
must be capable of using an lnbf and the receiver must be set in the menu
accordingly.
<d.vasant@gmail.com> wrote in message
news:1125518337.065945.295980@g44g2000cwa.googlegroups.com...
| Quote: | hi,
I have recently bought a 90cm c-band offset focus dish .Using this i
have tuned to asiasat3s and can able to receive some channels. But my
problem ican receive only channels with vetical polarized channels ,
the channels frequency ending with H cannot be received but not V.
Should i have adjust the scalar ring?
Regards,
vasanth
|
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Gary Tait
Guest
|
| Posted:
Thu Sep 01, 2005 4:08 pm Post subject:
Re: c-band receives only vertically polarized channels |
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d.vasant@gmail.com wrote in news:1125518337.065945.295980
@g44g2000cwa.googlegroups.com:
| Quote: | hi,
I have recently bought a 90cm c-band offset focus dish .Using this i
have tuned to asiasat3s and can able to receive some channels. But my
problem ican receive only channels with vetical polarized channels ,
the channels frequency ending with H cannot be received but not V.
Should i have adjust the scalar ring?
Regards,
vasanth
|
Besides 90CM not being C-band, I suspect you have a fixed polarity dish
that h as no polarotor, or a single polarity LNB/F. Most modern LNBFs are
voltage polarity changing. |
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Craig Sutton
Guest
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| Posted:
Sat Sep 03, 2005 4:08 pm Post subject:
Re: c-band receives only vertically polarized channels |
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"Valdivar" <rebelleader68@hotmail.com> wrote in message
news:fArRe.4408$884.631967@news20.bellglobal.com...
| Quote: | A 90 cm(!) dish is hardly for C band!Are you sure you got your figures
right?ie: Many of us have 90 cm and 1M ku band offset dishes -for ku
band,of
course.
Having said that,IF you are trying to use this dish with C band(less than
a
6 ft dish is not possible
|
In your part of the world perhap's but you may like to consider Asiasat 3S
at 105.5E is very strong in Asia.
It's very common to see 90cm offsets used on cband there. Apstar 6 at 134E
is another example of high power on Cband. Eirp of 45 or higher on cband.
No rain fade either! |
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SAC 441
Guest
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| Posted:
Sun Sep 04, 2005 12:08 am Post subject:
Re: c-band receives only vertically polarized channels |
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Craig Sutton wrote in response to a posting:
----"(excerpted) It's very common to see 90cm
offsets used on cband there.Apstar 6 at 134E
is another example of high power on Cband.
Eirp of 45 or higher on cband.
And no rain fade either!"----
Reply;
C-Band generally is NOT susceptible to rain fade no matter what downlink
power is used.
Even in the middle 1990's in the CONUS arc when 8 watt satellites were
used (low power sats),rain fade was not evident even then.Although,we
generally use higher power sats now,we have always utilized larger
arrays mainly because "backyard dish setups" initially in the early days
of C-Band (1980's) were trying to intercept signals that were intended
ONLY for commercial interests.When Europe started using C-Band for
similar purposes,the hardware and satellites were a cottage industry at
higher power levels and could use smaller dish setups.
Since the 1980's those of us who do STILL use
C-Band now in North America just carried the hardware industry forward
with larger arrays to maintain continuity.
The majority of satellite usage now is DBS (companies who actively
market signals) with high power setups,and C-Band usage declining
to just a little under 300,000 users today.
C-Band in North America has come full circle and turned back into a
"hobbyist medium".
The European model is vastly different,where C-Band is not a niche
application like in the US. |
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Guest
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| Posted:
Mon Sep 05, 2005 8:08 am Post subject:
Re: c-band receives only vertically polarized channels |
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hi SAC 441,
Can u tell me the higher power sats focuused into ASIA except asiasat
3s or tell me the place where can i get the details related downlink
power? |
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Chris
Guest
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| Posted:
Tue Sep 06, 2005 6:59 am Post subject:
Re: c-band receives only vertically polarized channels |
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d.vasant@gmail.com wrote in news:1125895112.391757.296050
@o13g2000cwo.googlegroups.com:
| Quote: | hi SAC 441,
Can u tell me the higher power sats focuused into ASIA except asiasat
3s or tell me the place where can i get the details related downlink
power?
|
http://www.lyngsat.com/asia.html
has lots of info. Follow the links to the satellite owners and you can
generally get spotbeam and power info.
--Chris |
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SAC 441
Guest
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| Posted:
Tue Sep 06, 2005 8:08 am Post subject:
Re: c-band receives only vertically polarized channels |
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Here is another site I like to use for worldwide satellite information:
http://www.satcodx.com |
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Craig Sutton
Guest
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| Posted:
Wed Sep 07, 2005 4:08 pm Post subject:
Re: c-band receives only vertically polarized channels |
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<d.vasant@gmail.com> wrote in message
news:1125895112.391757.296050@o13g2000cwo.googlegroups.com...
| Quote: | hi SAC 441,
Can u tell me the higher power sats focuused into ASIA except asiasat
3s or tell me the place where can i get the details related downlink
power?
www.apsattv.com |
and www.vetrun.com |
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Guest
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| Posted:
Fri Sep 16, 2005 8:08 am Post subject:
Re: c-band receives only vertically polarized channels |
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I have found the problem. Its due to my LNBF , i rotated it clockwise
by few angles and now i can receive horizontal same like vertical
channels as well as my signal quality increased.
Gary Tait wrote:
| Quote: | d.vasant@gmail.com wrote in news:1125518337.065945.295980
@g44g2000cwa.googlegroups.com:
hi,
I have recently bought a 90cm c-band offset focus dish .Using this i
have tuned to asiasat3s and can able to receive some channels. But my
problem ican receive only channels with vetical polarized channels ,
the channels frequency ending with H cannot be received but not V.
Should i have adjust the scalar ring?
Regards,
vasanth
Besides 90CM not being C-band, I suspect you have a fixed polarity dish
that h as no polarotor, or a single polarity LNB/F. Most modern LNBFs are
voltage polarity changing. |
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