[amsat-bb] Re: Need Advice for SDR choice

[Andrew Rich]

Can someone please explain to me how the IF is usefull ?

Does the radio become "narrow band" after the IF stages ?

What determines the radio IF bandwdith ?

Say my ICOM 706 can RX 430 - 450 MHZ, does that imply the whole 20 MHz is 
there centered on 10.7 MHz ?

- Andrew -


----- Original Message ----- 
From: "Greg D." <ko6th_greg at hotmail.com>
To: <vlfiscus at mcn.net>; <amsat-bb at amsat.org>
Sent: Tuesday, January 04, 2011 10:19 AM
Subject: [amsat-bb] Re: Need Advice for SDR choice


>
>
>
>> Date: Mon, 3 Jan 2011 14:26:55 -0700
>> To: amsat-bb at amsat.org
>> From: vlfiscus at mcn.net
>> Subject: [amsat-bb] Re: Need Advice for SDR choice
>>
>> At 06:25 PM 1/2/2011 -0500, marklhammond at gmail.com wrote:
>>
>> I'm going to look into SDR.  My Icom r-7100 has an IF out jack I could 
>> feed
>> into a unit.
>>
>
> That was my first thought too, but R-7000 receiver's IF is at 10.7 MHz and 
> the FCD only goes down to 64 MHz.
>
> On the other hand, the R7000's tuning range isn't that different from the 
> FCD, and I bet the FCD has better specs, so why bother with the receiver?
>
> Greg  KO6TH
>
>
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