I needed to lower the noise floor of my spectrum analyser and I recently purchased a used HP8447D preamplifier from Instrumex in Germany. The amp has a gain of >25dB from 100kHz to 1.3GHz.
http://www.instrumex.de/ The price including delivery was less than DM2000. The contact name at Instrumex was Jill Nielsen [email protected] Regards Chris Colgan EMC & Safety TAG McLaren Audio Ltd mailto:[email protected] > -----Original Message----- > From: Robert Legg [SMTP:[email protected]] > Sent: 11 July 2000 21:40 > To: IEEE EMC-PSTC Forum > Subject: EMI preamplifier > > > > Group, > > Can anyone recommend an inexpensive preamplifier for the input to a > spectrum analyser. BW requirement is 1MHz to 30mHz for conducted > emmissions > from an LISN tap. We need a noise floor below 1uV on the output, when fed > with a 10dB attenuator. > > With a noise floor of 10dBu , theres no way we can troubleshoot for a > customer's reported 6.5uV of interference. Removing the attenuator tends > to > overload the equipment due to LF content and the QA department won't stick > a CAL sticker on home-brew stuff. > > Rob Legg > Tectrol Inc. > [email protected] > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > ===================================================== Authorised on 07/12/00 at 09:38:08; code 37f48bf3B5238AAB. ********************************************************************** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd, The Summit, 11 Latham Road Huntingdon, Cambs, PE18 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ********************************************************************** ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
