Receiver Setup » History » Revision 4
Revision 3 (horiz0n, 02/19/2016 10:50 PM) → Revision 4/10 (steve-m, 02/19/2016 10:50 PM)
= Receiver Setup = == !FunCube FunCube Dongle Pro + helical antenna == This setup uses a !FunCube Dongle Pro along with a helical-antenna. Works fine without external LNA and the FCD gain set to 30dBm. FIXME [[Image(fcd_gmr_helix.jpg, 50%)]] == USRP + WBX + helical antenna == This setup works without any specific LNA, simply by using a USRP board with WBX front-end and a helical antenna [[Image(gmr-helical-antenna.png)]] == USRP + WBX + LNA + offset dish antenna == The signal chain looks as follows: * 80cm offset dish * selfmade RHCP feed (4 turns) * LNA BB 1020 A from Kuhne electronic (>28dB gain, 0.8dB NF) * L-Band dielectric filter * WBX with GDB (gain setting at 20dB) * USRP1 with standard clock 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. 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. [[Image(offset_dish.jpg)]]
