John,
The short answer is 'no'. Click here
for details and scroll to the bottom of the log...
Juan
-----Original Message-----
From: John B. Stephensen [mailto:[email protected]]
Sent: Sunday, July 01, 2007 2:42 PM
To:
Cc: [email protected]; Bill Ress; Dave Black (Home); Dave Black (Work); Dave
hartzell; David Smith; Don Ferguson; Juan. Rivera (Home); Juan.Rivera (Work);
Samsonoff@Mac. Com
Subject: Re: 10.7 MHz Spur
Does the spur go away if the external reference is on (whether or not
it is
routed to the PLLs)?
73,
John
KD6OZH
----- Original Message -----
From: "Juan Rivera" <
To: "John B. Stephensen" <[email protected]>
Cc: <[email protected]>; "Bill Ress"
<[email protected]>; "Dave Black
(Home)" <[email protected]>; "Dave Black
(Work)"
<[email protected]>; "Dave hartzell"
<[email protected]>; "David
Smith" <[email protected]>; "Don Ferguson"
<[email protected]>; "Juan. Rivera
(Home)" <
<[email protected]>; "Samsonoff@Mac. Com"
<[email protected]>
Sent: Saturday, June 30, 2007 14:22 UTC
Subject: 10.7 MHz Spur
> John,
>
> I found the source of the 10.7 MHz spur. It's being generated
inside the
> receiver itself. This is the first spur I have found that is not
caused
> by
> switching power supplies.
>
> The origin appears to be in the 10 MHz reference area. I turned
off and
> unplugged the SDR-IQ and fed the IF output from the 70 cm Receiver
to my
> TS-2000. The spur is still there.
>
> Next I connected the RF input to my sniffer loop and moved it around
the
> PCB
> surface. I get the strongest signal near the long trace between
the two
> Freq inputs to U4 and U9, the two phased-locked loops.
>
> 73,
>
> Juan
>
>