Message-ID: <001501c0d22d$58de2a50$0700000a@parissn2>
From: "Stewart Nelson" <sn@scgroup.com>
To: rsgb_lf_group@blacksheep.org
References: <3AEE8037.22045.5DE5B@localhost> <003101c0d227$4474d9c0$0700000a@parissn2>
Subject: Re: LF: Wolf Tests (file request correction)
Date: Tue, 1 May 2001 12:56:15 +0200
Organization: SC Group
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Sender: <majordom@post.thorcom.com>

Hi All,

Sorry, I just discovered that my attachment size limit is only 3.8 MB.
That should still be enough for 7 minutes at 8 kHz, 8 bits.

73,

Stewart

----- Original Message ----- 
From: "Stewart Nelson" <sn@scgroup.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, May 01, 2001 12:12 PM
Subject: Re: LF: Wolf Tests


> Hi Mike, Jim, and all,
> 
> I would like to get copies of your recordings, when you failed to copy Larry,
> so I can try to improve WOLF's QRM rejection and tracking.  Recordings from
> others are also welcome.  Please include your estimates of sample rate, center
> frequency, and original RF Tx frequency.
> 
> Seven minutes, at the time you feel decoding should have been most likely,
> should be plenty.  Five minutes is probably adequate.
> 
> My mail server will only accept attachments of up to about 7 MB.  If you
> have problems with upload speed, you might want to send less than that.
> To reduce file size, if the original recording is 16-bit, convert to
> 8-bit.  In Cool Edit, use Edit->Convert Sample Type.  That won't add
> significant noise, provided that frequent signal peaks are -6 dB or
> higher.  If necessary (for file size), convert the sample rate to
> 8000 Hz in the same operation.  If the original level is low, try
> Transform->Amplitude->Normalize first.  Normalize to about 80%.
> ZIPping the resulting 8-bit file should make it a little smaller.
> 
> Of course, if you have a server to which you can upload the file, do
> so and just send me the URL.  Don't bother with any file conversions
> if upload speed and server space are not problems.  I'll let you know
> as soon as I fetch the data, so you can delete it and reclaim the space.
> 
> 73,
> 
> Stewart KK7KA
> 
> 
>