Receiver Setup » History » Version 3
horiz0n, 02/19/2016 10:50 PM
| 1 | 1 | laforge | = Receiver Setup = |
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| 3 | 3 | horiz0n | == FunCube Dongle Pro + helical antenna == |
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| 5 | FIXME |
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| 7 | 1 | laforge | == USRP + WBX + helical antenna == |
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| 9 | This setup works without any specific LNA, simply by using a USRP board with WBX front-end and a helical antenna |
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| 11 | 2 | laforge | [[Image(gmr-helical-antenna.png)]] |
| 12 | 1 | laforge | |
| 13 | == USRP + WBX + LNA + offset dish antenna == |
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| 15 | 3 | horiz0n | The signal chain looks as follows: |
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| 17 | * 80cm offset dish |
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| 18 | * selfmade RHCP feed (4 turns) |
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| 19 | * LNA BB 1020 A from Kuhne electronic (>28dB gain, 0.8dB NF) |
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| 20 | * L-Band dielectric filter |
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| 21 | * WBX with GDB (gain setting at 20dB) |
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| 22 | * USRP1 with standard clock |
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| 24 | It is extremely helpful to observe the waterfall display while moving the dish. When adjusting for best reception, you have something like 10 degrees of margin in H and V direction. Gpredict has been used to evaluate Thuraya bearing with good results. |
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| 26 | The antenna feed was built following the guidelines from http://www.uhf-satcom.com/lband/. Please note, that Thuraya uses LHC polarization, so the feed has to be RHCP because of the mirroring dish. |
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| 28 | [[Image(offset_dish.jpg)]] |
