Who can help me ?

1

13699960652

Member
My Satellite Setup
P4
My Location
china
Hellow,everyone !
This is my frist time to this forum .I am a student live in xinjiang province China .
My english is bad ,please don't ridrcule me :(
I am very interesting in satellite communicating, and this is my professional too. For these day ,I am stduying the Turbo Prouct Code, I have known the Comtech EFdata company's Turbo Prouct Code structure .Include the 1/2 3/4 7/8 0.95 TPC , It's Sync frame is 20768 2964 16320 4032 Bit.
Recently, I meet a strange signal , It's Sync frame=32200Bit, I guess it's a unknown Turbo Prouct Code, Can you tell me what it is ? and what modem modulated it?
Last, if you can tell me the other major satellite modem's TPC structure (include the LDPC),, I would be very thankful!:)
 
Welcome to the forum 13699960652 (!)

I would think any answers concerning this form of FEC is beyond the scope of most on this forum, being mainly a hobbyist's site.

Hope you find what you require eventually though.
 
You should get more information if you search for Partial Unit Memory Codes, which are used for exceedingly low signal (or extreme distance) handshaking.

Mainly used for deep space communication, so it is unlikely any Comtech modem would have this particular value built within its parameters.
 
Thanks for Llew and Channel Hopper!!
About the signal ,I wonder to describe more clear . The signal Sync frame=32200Bit , symbo rate= 3786Kbps, Sync mark block=24Bit.
I am very happy to this forum .I often watch satellite TV too. But because the living location of the reasons ,I only can reveive 20°E~160°E satellites ：（ My geographical coordinates is 87°E，44°N.
I hope can meet more friend at this forum!
 
So, which satellite (if any) did you get this signal from ?
 
In many satellites can meet this signal:
1、 30.5°E（ARAB-2B) C band,3791MHz ,symbo rate=12966Kbps
2、 75°E（ABS-1) C band,3786MHz, symbo rate=6094Kbps
3、 75°E（ABS-1) C band,3797.44MHz, symbo rate=2987Kbps
4、 76.5°E(Apstar-2) C band,3637MHz,symbo rate=6035Kbps
 
By the way,I want to say, In my recepting of satellite television,I often meet another strange signals, I have them listed in the following：
1、64°E（Intelsat906) C band L:4123MHz, 8PSK,symbo rate=9626.8Kbps
2、62°E（Intelsat902) C band L:3631MHz, QPSK,symbo rate=2457Kbps
3、62°E（Intelsat902) C band L:3811.7MHz, QPSK,symbo rate=1456Kbps
4、62°E（Intelsat902) C band L:3813.5MHz, QPSK,symbo rate=1114.64Kbps
5、62°E（Intelsat902) C band R:4195MHz, QPSK,symbo rate=4133Kbps
6、21.6°E（Eusat-W6) Ku band V:11358MHz,QPSK, symbo rate=15000Kbps
7、30.5°E（Arabsat-2B) C band R:3883MHz, QPSK ,symbo rate=3160Kbps
8、53°E（Express-AM22) Ku band V:11688.5MHz,QPSK, symbo rate=4500Kbps
9、36°E(Eusat-W7) Ku band V:11683MHz,OQPSK, symbo rate=116300Kbps
10、36°E(Eusat-W7) Ku band V:12674MHz,QPSK, symbo rate=2458Kbps
Do you know what these signals Modulation Parameters? Are they television signals do? If they are,What satellite modem modulate them? If you know ,I hope you can tell me. thanks!
 
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