Re: MMIC for LEO preamp? - AMSAT-BB - mailman.amsat.org

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Re: MMIC for LEO preamp?

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RFI-EMI-GUY

28 Nov 2008 28 Nov '08

8:04 p.m.

I have always wondered why so much discussion around noise figure ignores the application of a SINAD meter in tuning receiver system preamplifiers? Does not the SINAD meter accomplish the same goal without having to disable AGC etc?

-- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P

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Art McBride

29 Nov 29 Nov

7:02 a.m.

New subject: [amsat-bb] Re: MMIC for LEO preamp?

Joe, Here is a good explanation of Noise Figure Measurement in the SBMS Newsletter. http://www.ham-radio.com/sbms/newsletters/2008nwsltrs/03sbms08.pdf

Art, KC6UQH

-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of RFI-EMI-GUY Sent: Friday, November 28, 2008 12:05 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: MMIC for LEO preamp?

I have always wondered why so much discussion around noise figure ignores the application of a SINAD meter in tuning receiver system preamplifiers? Does not the SINAD meter accomplish the same goal without having to disable AGC etc?

-- Joe Leikhim K4SAT "The RFI-EMI-GUY"C "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb __________ Information from ESET NOD32 Antivirus, version of virus signature database 3650 (20081128) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3650 (20081128) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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Art McBride
RFI-EMI-GUY