Return-Path: Received: (qmail 14812 invoked from network); 14 Jun 2001 20:54:34 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 Jun 2001 20:54:34 -0000 Received: (qmail 29293 invoked from network); 14 Jun 2001 20:54:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 14 Jun 2001 20:54:14 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Ae2e-00064u-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 14 Jun 2001 21:48:36 +0100 Received: from imo-r08.mx.aol.com ([152.163.225.104]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Ae2d-00064p-00 for rsgb_lf_group@blacksheep.org; Thu, 14 Jun 2001 21:48:35 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from DL4YHF@aol.com by imo-r08.mx.aol.com (mail_out_v30.22.) id l.84.17611793 (3936); Thu, 14 Jun 2001 16:47:51 -0400 (EDT) From: DL4YHF@aol.com Message-ID: <84.17611793.285a7cf6@aol.com> Date: Thu, 14 Jun 2001 16:47:50 EDT Subject: LF: Spectrum Lab - new functions To: rsgb_lf_group@blacksheep.org Cc: nils.schiffhauer@metronet.de MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows DE sub 217 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit Hi Alan, Brian, Peter,

and others playing with Spectrum Lab:
I have just uploaded a slightly improved version of the program to its "main"
site (not the 'beta' site, though it still has 'beta' status) :

http://members.aol.com/dl4yhfhamsoft/spectr_i.zip .

Modified or new:
- the value returned by the noise detection function (based on G4JNTs
algorithm) can now be 'normalized' for a RX bandwidth of 1 Hz, making it no
longer dependent on the current FFT settings.

- demo file for the "software VLF receiver" now supports easy changing of the
"VFO frequency" simply by moving a marker on the frequency axis of the
spectrum graph, also the volume of the filter output can now be changed
without having to change the filter itself (click on the amplifier symbol in
the circuit window, this is not described in the manual yet).

- sideband rejection of the VLF receiver improved (better 90 degree phase
shifter, if your PC is fast enough you can increast the length of the Hilbert
transformer. Not described in the manual yet...)

- Inaccuracy of the "cursor" function with horizontal running waterfall has
been fixed, thanks Brian !

Thanks to all testers for their time and patience. The uploaded version is
"V1.65 beta 8". Good luck with it !

73, Wolf DL4YHF.