On 11/24/2020 02:38 PM, Luke Whittlesey wrote:
I'm in the process, but it's a lengthy process. There is something
messed up with the C API in 3.15, so it doesn't work for me as a
simple drop in replacement. Would it be wise to try to jump straight
to 4.0?
The jump to 4.0 might be more traumatic.
On Tue, Nov 24, 2020 at 2:40 PM Marcus D Leech <patchvonbr...@gmail.com> wrote:
R&D suggest updating to a UHD 3.15 environment first.
Sent from my iPhone
On Nov 24, 2020, at 1:54 PM, Luke Whittlesey <luke.whittle...@gmail.com> wrote:
I'm seeing this on two E310s that are a few years old. I just swapped
the sd card into a brand-new E310 and I am NOT seeing the frequency
jumps. So, same exact software, but different aged E310s. Is there
possibly a difference in hardware leading to this?
On Tue, Nov 24, 2020 at 1:04 PM Luke Whittlesey
<luke.whittle...@gmail.com> wrote:
I would say they are proportional to frequency. Attached is what it
looks like at 5GHz. There are jumps of 400Hz and 220Hz.
On Tue, Nov 24, 2020 at 11:50 AM Marcus D Leech <patchvonbr...@gmail.com> wrote:
Try at lower and higher frequencies—are the jumps the same or proportional to
frequency?
Sent from my iPhone
On Nov 24, 2020, at 11:27 AM, Luke Whittlesey via USRP-users
<usrp-users@lists.ettus.com> wrote:
On the E310 I'm seeing discrete jumps in the carrier. The carrier will
intermittently jump around in steps of about 50Hz. Sometimes it will
jump by about 200Hz. I've attached a waterfall display, but I don't
know if attachments will make it through.
My setup is:
E310 SG3
UHD3.11 using the C-api
Timing Reference is "internal"
Center Frequency 1GHz
I/Q signal is a stream of 1,0... for a CW at the carrier
I can see the same thing when I set the timesource to "gpsdo", but I
wouldn't expect it when I set it to "internal". My gut says that this
is being caused by some timesource correction loop. If this is the
case is there a way to disable this?
Thank you
<e310-lo-frequency-shifts2.png>
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