RE: [linrad] I-Q and HF SSB/AM/FM questions, bulk buy for 200Mhz SAW oscs

["w3sz" <w3sz@xxxxxxxxxxxxxxx]

Hi, Alex!

You might check out the reprint of my DUBUS article on using
Linrad for your interface questions.  I have it on one of my
webpages at:

http://www.qsl.net/w3sz/start.htm and then click on either
the PDF or DOC version.

Or go directly to:
http://www.qsl.net/w3sz/DUBUSLinrad2002.pdf or
http://www.qsl.net/w3sz/DUBUSLinradFinal.doc

You will want the color illustration 
http://www.qsl.net/w3sz/i3dlifinal.png
handy as you read the text.

I have used my Linrad hardware with the SDR1000Console
program, and I have also used the SDR1000 Hardware with
Linrad.  It works both ways.  

The Linrad hardware and software are currently more advanced
for weak signal work than their SDR counterparts.

As Leif said, you can use Linrad as it exists for SSB work. 
Just pull the filter to the right width and adjust the BFO
properly.  My article will tell you how to do this.

Let me know if you have any other questions.

The Linrad Software is second to none, and the
Antennspecialisten hardware is superb.  Together they make
the best weak signal receiver in the world.  

In this case, your mileage WON'T vary if you go that route
;)

73,

ROger Rehr
W3SZ
 
----- Message Forwarded on 07/04/03 -----
From: Alex Crow <acrow@xxxxxxxxxxxxxxxx>
To: linrad@xxxxxxxxxxxxxxxxxxxxx
Subject: [linrad] I-Q and HF SSB/AM/FM questions, bulk buy
for 200Mhz SAW oscs
Date: Fri, 04 Jul 2003 16:16:21 +0100
Hi all,

I am new to the list and very new to linrad - I only
installed it yesterday  and am already bewildered by its
(admittedly very cool) interface.

I am in the process of building an HF receiver based on the
SDR-1000, see  http://www.flex-radio.com which is a based on
a Tayloe detector and produces  I-Q signals at baseband, one
going to the left input on my SB16 (yes, I know  it's not
great) and one to the right.

I noticed that Linrad has an SSB and FM mode with I-Q input,
but I can't find  any guide to using it this way. Does
anyone have any pointers for getting the  software tuned for
SSB/AM and FM, and which controls are relevant for its 
reception once you're in the main window?

On another note, my design, as does the SDR-1000, requires a
low-jitter source  of 200MHz to clock the AD9854 DDS in
order not to degrade its good phase  noise performance. I
have found a source for these (Epson QD, EG2121CA,  jitter
sub 5ps) but the price is a little high at 38UKP each. Does
anyone on  the list know, or have, anything as good as these
at a better price? If  others are interested in these I may
be able to get a discount on more than  5.

Cheers

Alex Crow



73,
Roger Rehr
W3SZ
FN20ah
http://www.qsl.net/w3sz




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