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Date: Wed, 18 Nov 2015 09:13:20 +0000
Message-ID: <CAA8k23Tj6FMWmtLk_+5=uF-ZC7kYJqhTfhm1BowKD1izphFhpA@mail.gmail.com>
From: Andy Talbot <andy.g4jnt@gmail.com>
To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@yahoogroups.co.uk
Subject: LF: Coherent LF Receiver
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Details of my Coherent LF receiver for digitising a signal centred on 1kHz
then sending I/Q baseband samples over a serial link to a PC can be found
at http://www.g4jnt.com/Coherent_LF_Receiver.pdf

The PC software linked in there - written in VB6 - can generate a .WAV file
of decimated samples in a format that EbNaut can read.   I've saved that as
a full installation package for those without VB runtime libraries present

The PIC based digitiser is useable with a conventional receiver delivering
a 1kHz tone.  The opamp band pass filter provides adequate anti-aliasing
for the majority of purposes, but if you use a narrow CW type filter in the
receiver to reject audio below 750Hz and above 1250Hz,  the opamps could be
dispensed with and the PIC used on its own

Andy  G4JNT

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<div dir=3D"ltr"><div>Details of my Coherent LF receiver for digitising a s=
ignal centred on 1kHz then sending I/Q baseband samples over a serial link =
to a PC can be found at <a href=3D"http://www.g4jnt.com/Coherent_LF_Receive=
r.pdf">http://www.g4jnt.com/Coherent_LF_Receiver.pdf</a></div><div><br></di=
v><div>The PC software linked in there - written in VB6 - can generate a .W=
AV file of decimated samples in a format that EbNaut can read.=C2=A0=C2=A0 =
I&#39;ve saved that as a full installation package for those without=C2=A0V=
B runtime libraries present</div><div><br></div><div>The PIC based digitise=
r=C2=A0is useable with a conventional receiver delivering a 1kHz tone.=C2=
=A0 The opamp band pass filter provides adequate anti-aliasing for the majo=
rity of purposes, but if you use a narrow CW type filter in the receiver=C2=
=A0to reject audio below 750Hz and above 1250Hz, =C2=A0the opamps=C2=A0coul=
d be dispensed with and the PIC used on its own</div><div><br></div><div>An=
dy=C2=A0 G4JNT</div><div><br></div><div><br></div></div>

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