Hello Christian, On Tue, 06 Mar 2012 17:49:02 +0100, "Christian Daniel -- maintech GmbH" <cd@maintech.de> wrote:
The RX is not a sensitivity-wonder. Perhaps a preamp?
I have to correct my previous posting, the Funcube has an LNA between antenna and the E4000 so the sensitivity numbers are not comparable. But maybe it is possible to use a similar circuit. Best regards, Dieter -- Dieter Spaar, Germany spaar@mirider.augusta.de
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Arrrrrrrgh, your package is still laying here... sorry... :((((((( (head -> desk) Good to remind me - I'll bring it to the post office tomorrow, finally... Yes, Stefan told me about the preamp on the Funcube - that's why I made the measurements. I guess, this means, that the OsmoSDR will get one as well... Size is a problem tough... Best regards, Christian On 06.03.2012 18:47, Dieter Spaar wrote:
Hello Christian,
On Tue, 06 Mar 2012 17:49:02 +0100, "Christian Daniel -- maintech GmbH" <cd@maintech.de> wrote:
The RX is not a sensitivity-wonder. Perhaps a preamp?
I have to correct my previous posting, the Funcube has an LNA between antenna and the E4000 so the sensitivity numbers are not comparable.
But maybe it is possible to use a similar circuit.
Best regards, Dieter
- -- - --------------------------------------------------- | maintech # Dipl. Inf (FH) Christian Daniel | | GmbH ### Otto-Hahn-Str. 15 · D-97204 Höchberg | - --------------------------------------------------- | AG Würzburg, HRB 8790 Tax-ID DE242279645 | - --------------------------------------------------- | http://www.maintech.de cd@maintech.de | - --------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPVlB+AAoJEHkgzUIsAWriaskH/A6yzIZGZlG0V9OLge7dobUy UBIuPNjrLgLxYhg0waa/uVrY8uP4/ianPi+zLL90+qu/cFQIqAMpYPZJn4gB9fHY U6veL+TmHGXf6lYp8cfXM2goYMPxduRwLFrxhRegvzdYKbtx4yWWiLxwBCLxMcvD +yKIeBott9lOnaf3DP4QJE0cYY0YImCP5qPGz5zlHjrjXyJVRoGJ12CilHE2vj9r HXfck0abLV5o8aP9bsMXxDnLukM8eRdvHx0yr/lEsQ3l2tONoabISND09jIgA3L0 SK2AM0TkWiTEZsKWmHfM+64C8nkSwXXlddKe2nLYi2N64AwOMz6/+b6Svs5h79o= =WYrI -----END PGP SIGNATURE-----
Hi,
Yes, Stefan told me about the preamp on the Funcube - that's why I made the measurements. I guess, this means, that the OsmoSDR will get one as well...
Size is a problem tough...
You could use a SPF5043Z made by RFMD. It is a tiny MMIC in a SOT343 package. With a proper PCB layout of the power plane it should be very easy to integrate it in the OsmoSDR PCB. PS.: I really would like to see/do some tests on the influence of the inductively of the header pins (including jumper) within the signal path. Ulf
participants (4)
-
Christian Daniel -- maintech GmbH -
Dieter Spaar -
Steve Markgraf -
Ulf Wetzker