Receiving Low Transponder Frequencys.

pontiend

Contibruter
Joined
Dec 12, 2007
Messages
2,844
Reaction score
3,330
Points
113
Age
78
Location
South Yorkshire
My Satellite Setup
See Signature
My Location
south yorkshire
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

Specialist Contributor
Joined
Oct 2, 2011
Messages
639
Reaction score
309
Points
63
Age
40
My Satellite Setup
-
120cm Echostar and 70cm (2nd location)
TBS 5925
My Location
52,0°N, 4,3°E and 52,5°N, 13,4°E
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 :)
 

pontiend

Contibruter
Joined
Dec 12, 2007
Messages
2,844
Reaction score
3,330
Points
113
Age
78
Location
South Yorkshire
My Satellite Setup
See Signature
My Location
south yorkshire
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

Specialist Contributor
Joined
Oct 2, 2011
Messages
639
Reaction score
309
Points
63
Age
40
My Satellite Setup
-
120cm Echostar and 70cm (2nd location)
TBS 5925
My Location
52,0°N, 4,3°E and 52,5°N, 13,4°E
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

Satellite Freak
Joined
Sep 11, 2008
Messages
6,005
Reaction score
1,263
Points
113
My Satellite Setup
57E to 58W, C-band and Ku, DVB-S2, 4:2:2 and blindscan.
My Location
38.5ºN, 0.5ºW
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.
 

pontiend

Contibruter
Joined
Dec 12, 2007
Messages
2,844
Reaction score
3,330
Points
113
Age
78
Location
South Yorkshire
My Satellite Setup
See Signature
My Location
south yorkshire
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

Specialist Contributor
Joined
Jul 6, 2006
Messages
611
Reaction score
442
Points
63
Age
76
My Satellite Setup
150cm gibertini dish,echostar 8700 analogue receiver to move dish,motor jaeger 1224,also black ultra ku lnb and esx241 c-band lnbf and technomate 5402hd ci+ super also added a Dr HD f15 receiver
My Location
Sandown Isle of Wight
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

Specialist Contributor
Joined
Oct 2, 2011
Messages
639
Reaction score
309
Points
63
Age
40
My Satellite Setup
-
120cm Echostar and 70cm (2nd location)
TBS 5925
My Location
52,0°N, 4,3°E and 52,5°N, 13,4°E
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

Contibruter
Joined
Dec 12, 2007
Messages
2,844
Reaction score
3,330
Points
113
Age
78
Location
South Yorkshire
My Satellite Setup
See Signature
My Location
south yorkshire
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.:(
 

pontiend

Contibruter
Joined
Dec 12, 2007
Messages
2,844
Reaction score
3,330
Points
113
Age
78
Location
South Yorkshire
My Satellite Setup
See Signature
My Location
south yorkshire
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.:)
 
Top