Receiving Low Transponder Frequencys.

pontiend

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In my Alien2 satellite .xml list for 45West,are some low transponder frequencys.I have scanned them and found nothing.Howevr I may be reading things wrong.maybe even the Alien cannot scan these frequencys.Being a believer in that if you do not ask you do not find out.Would someone clarify the following frequency info.
<transponder frequency="3766000" symbol-rate=3255000"polarization="1" fec_inner="3" system="0" modulation="1"/>

I get it to mean.
TP 3766v sr3255 fec 3/4.
I don't know what system "0" is.Or system "1" I think that moulation "1" is QPSK "2" is 8PSK.
Also I have wonderd for some time what inversion is.On the Alien I have a choice of auto. on . or off. I leave it at auto.
I hope that that makes some kind of sense.
Please enlighten me.:)
 

BlindFaith

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Dunno Alien2 and can't receive C-band but according to Lyngsat this transponder is on the Americas Beam. hxxp://www.lyngsat.com/Intelsat-14.html
"inversion" relates to the I/Q outputs of the dig. demodulator. Just leave it at auto :)
 

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Thanks.Blind faith,are they c band.transponders then.
I have just been sat looking at my Orbital dish and one of my last three brain cells lit up.
How low a frequency can my inverto black lnb see anyway.:)

Re inversion. I have wondered about that since my DM500s six years ago It worked ok on auto so never bothered about it.It is still nice to know what it does though.
 

BlindFaith

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How low a frequency can my inverto black lnb see anyway.
That depends on the lowest IF (intermediate frequency) your tuner can handle. IF range of most tuners is 950-2150 MHz. Your inverto black is a universal lnb. The low band LOF is 9750MHz -> 950+9750=10700 [MHz]

10.700 is the lowest frequency. The LNB could go lower but your tuner sets the limit ;)
 

Huevos

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System='0' is DVB-S; system='1' is DVB-S2. All DVB receivers can handle these frequencies, but you would need a C-band LNB. If there is no 5150 MHz L.O. available in the software of the receiver you just set the LNB as universal and do a conversion into Ku band numbers.
 

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I have just spent an hour trying to get the specs off firefox.
This may work it may not.:)Alien tuner.png

Sorry thats the wrong one,back to the drawing board
Worked out how to do it.:)


Tuner Type: DVB-S / DVB-S2
Input Connector: F-type, Connector, Female
Loop Through: F-type, Connector, Female
Signal Level: -65 to -25 dBm
LNB Power & Polarization: Vertical: +13V/+14V, Horizontal: +18V/+19V, Current: Max. 500mA, Overload Protection
22KHz Tone: Frequency: 22±1KHz
DiSEqC Control: Amplitude: 0.6±0.2V, Version 1.0, 1.1 1.2, USALS Available
Demodulation: QPSK, 8PSK
Input Symbol Rate: 2-45 Mbps, Convolution Code Rate
1/2, 2/3, 3/4, 5/6,7/8,1/4,1/3,2/5,3/5,4/5,8/9,9/10 and Auto.
 

pride21

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hi pontiend the only c-band channels you will get are data channels which are 3764H 10443,3780V 12999 and 3815H 2000 though i am getting 3722H at 68% but no lock.
 

BlindFaith

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hi pontiend the only c-band channels you will get are data channels which are 3764H 10443,3780V 12999 and 3815H 2000 though i am getting 3722H at 68% but no lock.
I don't think that @pontient's intention is to receive c-band ;) Look at his setup: 100cm dish and Ku-band LNB.
All he did was trying to scan c-band transponder frequencies that were in his list without knowing that he can't receive any ;)
 

pontiend

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I do know that I cannot recieve cband.What I did not know is that those transponders where cband.When I download xml files from Satellites-xml I tick KU band only.I do not know what they were doing in my xml file.:)
I normaly use .eu.last time I used satellite-xml.org.I must have missed the KU band box.:(
 

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This thread should have been called Pontiends Questions.:D
Thank you for the answers to my many Questions.:)
However Answers to Questions beget more Questions.So while I am at it I have one more.
All the answers above have proved usefull.
I have just inserted 48east and its transponders into my xml file.
In the sat line is 'flags' I use flags="0" because that is mostly used.
Another one that I do not know. What dose flags do and what are is options.
I promise that this is the last one.:)
 
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