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As seen in the attachment, the Resolution was set to Default,
Waterfall Speed to 1, and Bandwidth to 500 KHz. Rebooted again
and still no change, with ~1 Sec delay in tuning SDR to frequency.
Now the Twilight Zone
moment. I created two YouTube
videos, the first one, SDRC Lag Test 1
) clearly shows the lag between
displayed frequency change and audible lag in pitch change. You
can also see it in the movement of the bandwidth window.
Now, again, after playing with the waterfall speeds, bandwidth,
extra displays, etc., SDRC magically started working again, as
seen in this SDRC Lag Test 2
) video, made just 11 minutes
after Test 1
Also note that I reset the Bandwidth to 2.048 MHz, and the
Waterfall speed to 15 on BOTH videos. Not shown, but tested,
afterwards, I re-enabled the Spectrum display, and it still
operates as normal. Additionally, the CPU, GPU, and Audio times on
both videos were about the same.
In closing, I'm sorry to bother everyone with this issue, as
Windows in it's mysterious ways, does what it wants, when it
wants, with no explanation, not to mention it's serious lack of
On 6/6/2020 5:47 PM, Siegfried Jackstien wrote:
something you could try ...
close all not needed boxes (if display, spectrum view in rx and
tx box etc ... )
lower waterfall speed
lower resolution to default (maybe you have it set to x4 or
then after setting all that ... a fresh start ... now a bit
all that lowers cpu load (and only cpu load is what causes that
greetz sigi dg9bfc
Am 06.06.2020 um 20:17 schrieb Bill Walch:
Are there some configuration or log files that would show the
differences between the desktop and the laptop, that would
tell you how each is functioning? Perhaps there's a wrong
driver, dll, etc. that's buggering up the works.
On 6/6/2020 4:10 PM, Bill Walch via groups.io wrote:
OK, here's a twist for you. Just for S&G's, I fired up
SDR Uno (running the latest version 1.33), and it does NOT
have the tuning lag seen in SDRC or HD-SDR using the RSP1a.
No worries though, I'll never use Uno, as SDRC is
the only SDR software of any capability and functionality.
I'm at my wits end on this. I'm fairly convinced
it's not an issue with SDRC. I even tried V.3.0.12/13 again
and still the same issue. I also uninstalled SDR Uno and
installed V.1.32 (older version) and still no difference.
Other than Win10 updates, there really hasn't been any other
changes to my system.
As a last resort, I installed SDRC v.3.0.23 (and SDR Uno
1.33, just to get the correct drivers) on my HP i7 16GB
(with integrated NVIDIA GPU), Win10 Pro laptop, and unlike
my desktop, SDRC does NOT have the tuning lag. Note
that these two SDR programs are the first on this laptop. As
far as I know, both Win10 machines are the same versions
with current updates.
Any suggestions would be greatly appreciated.
P.S. When I said I "hated" Win10, that may have been a bit
too harsh. I should have said, that I have a real dislike of
the UI, using Classic Shell, to rid myself if all the
blotted menus and animation, etc. This also seems to have a
lot more processes running than Win7 Pro did (I still have a
PC running it), and also MS has locked down update options
that I may or may not want, giving me no choice. But, all
this is for a different time.
On 6/4/2020 4:35 PM, Max wrote:
Just to confirm I don't feel it should be an issue with SDRC
running on W10, I don't see any lag at all. I even checked
it before writing this to make sure I have not
subconsciously bypassed it, but no..... tuning a CW signal I
can hear only instantaneous frequency changes in SDRC when
stepping frequency with the cursor/arrow keys on my keyboard
(my preferred tuning method). Just for reference I also have
I think you may have something running in your system that
is soaking proc time? I admit it can be extremely
frustrating when it's not possible to track down the source
of a problem in Windows..... had plenty of those, but like
Simon I am generally a big fan of W10. Think it is the best
MS has managed so far by a country mile. Having said that,
the boot time is a right royal pain. If you have ever owned
a Chnromebook you will know what I mean.... instant boot!
Good luck and 73
On Thu, Jun 4, 2020 at 08:24 PM, Bill Walch wrote:
From what I see, this is a Windows 10 issue (did
I mention how much I hate Win10!). I haven't been
using SDR that regularly, but I do recall a recent update,
which may be the problem. In a futile attempt, I brought
up Task Manager, and while tuning, tried to observe the
CPU usage when rotating the mouse wheel, which didn't
reveal anything obvious.