Gerald,
Thanks for the info. I understand the problem now. I'll look forward
to the fix in a future version. Fortunately this isn't a problem on my
5000A, which is my primary radio.
73,
Clay W7CE
On 11/13/2010 7:28 AM, Gerald Youngblood wrote:
Clay, those modes move the LO around. The spurs you see on AM and FM
will get corrected soon when we go back to turning off the TX LO
during RX on the FLEX-3000. They are working on that now.
73,
Gerald
Gerald Youngblood, K5SDR
President and CEO
FlexRadio Systems(TM)
13091 Pond Springs Road, #250
Austin, TX 78729
Phone: 512-535-4713 Ext. 202
Email: [email protected] <mailto:[email protected]>
Web: www.flexradio.com <http://www.flex-radio.com/>
Tune In Excitement (TM)
PowerSDR(TM) is a trademark of FlexRadio Systems
On Sat, Nov 13, 2010 at 9:22 AM, Clay W7CE <[email protected]
<mailto:[email protected]>> wrote:
Thanks for the info Gerald. I'm still confused why a mode change
would affect the spurs as seen on the panadapter. Aren't mode
changes handled completely in software? I'm not having a problem
with CW or USB/LSB spurs. But when I switch to AM or FM, new
spurs show up on the panadapter, many of which are now in the
wider passband.
73,
Clay W7CE
On 11/12/2010 6:15 AM, Gerald Youngblood wrote:
Tim is correct about the cause. This is being addressed as part
of the CW iteration.
Gerald
Gerald Youngblood, K5SDR
President and CEO
FlexRadio Systems(TM)
13091 Pond Springs Road, #250
Austin, TX 78729
Phone: 512-535-4713 Ext. 202
Email: [email protected] <mailto:[email protected]>
Web: www.flexradio.com <http://www.flex-radio.com/>
Tune In Excitement (TM)
PowerSDR(TM) is a trademark of FlexRadio Systems
On Fri, Nov 12, 2010 at 7:27 AM, Tim Ellison <[email protected]
<mailto:[email protected]>> wrote:
I believe that on the 3000, the QSE is left on during RX to
improve RX/TX/RX switching performance and it is leaking into
the QSD. If this is the case, it is a known problem and I
believe it is one of the things that will be addressed when
the CW is revamped.
-Tim
-----Original Message-----
From: [email protected]
<mailto:[email protected]>
[mailto:[email protected]
<mailto:[email protected]>] On Behalf Of Clay W7CE
Sent: Friday, November 12, 2010 2:41 AM
To: Flexedge
Subject: [FlexEdge] Flex 3000 Spurs on AM
I had hoped that 2.0.16 would fix this problem, but it looks
unchanged.
If I tune to 50.400 MHz (the local 6M AM frequency) and
select AM mode with a 6.6 kHz BW, there are 4 spurs in the AM
passband with the strongest at -100 dBm (S 4.5). If I turn
SR on, the spurs move and decrease in amplitude, but there
are still 4 spurs with the strongest at
-114 dBm (S2+). If I select USB, LSB, DSB, CWL or CWU the
spurs disappear from the panadapter. I don't know if this
happens on the lower frequencies, but it makes AM unusable on
6M. I just checked
50.300 on FM and the same issue exists. The spurs will be
stronger than many FM simplex stations on that frequency.
Why does changing mode cause a change in the spurs? I
wouldn't expect the DDS to be reprogrammed when the mode changes.
Is this a known problem that will eventually be fixed? BTW,
I've never seen this on my 5000A.
73,
Clay W7CE
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This is the FlexRadio Systems e-mail Reflector called
FlexEdge. It is used for posting topics related to SDR
software development and experimentalist who are using beta
versions of the software.
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Flexedge mailing list
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http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz
This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for
posting topics related to SDR software development and experimentalist who are
using beta versions of the software.
