It's not an easy subject to wrap your mind around.
I'm sure I am not the be all and end all of knowledge here. But,
this is a bullet I bit with my first USB toy, a USB 1.1 something
that my then USB 1.0 keyboard slowed down. (As you get older you
get more and more "it didn't work" or the occasional "it did work"
that stick in the mind.)
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On 20210704 05:13:33, James Niven
Thanks, Jdow, I appreciate your insight and
So, I feel kind of goofy now. I was curious
as to the actual usb ports on desktop computer. On the front
there are 2 usb2 black tongue ports, but on the rear of the
computer, wait for it…..4 usb3 ports with the blue tongue and
2 usb2 ports with the black tongue.
I did not realize I had these on the rear,
it would have saved me a lot of headaches. So, I need to
purchase a usb3 hub to allow easy access to plug in my
external hard drive with saved sdr console files for playback
rather than moving the desktop every time to plugging in my
external hard drive. I plugged my external HD into the usb3
port and played my files on sdr console, no problems, no
stutter what so ever.
Depending on what you want to do the
"expensive" route is a card with more than one controller on
it. By controller I mean a device that speaks to the computer
busses directly say via a PCIe socket. I do not mean a
controller followed by a hub to split it into for USB 3
sockets. The four controller card I have (closer to $300 than
$100) has four controllers so I could in theory have four USB
3.1 transfers going on simultaneously at very near the peak
speed capability of the four USB 3.1 busses added together.
The limit would be the PCIe bus I believe. With that running a
pair of AirSpy R2 devices at full 10 MHz is easy. If OTHER
aspects of the computer could support it a pair of R888s at
full 64 (or so) MHz wide sets of samples could be processed at
the same time. (That might be sufficient to get my computer to
roll over and die, though. If not I have disks I could put on
the other two USB ports to capture the data. I don't think
that would work, especially after the speculative execution
slowdowns in the current INTEL kernel downgrades due to
On 20210704 03:28:39, James Niven wrote:
So, with a little googling, it seems I
can add a usb card to my desktop computer with usb3.0 ports,
this may be a solution.
Thanks, but the answer is no according to
this article, its based on the port on the laptop/computer
to start with.
Thanks very much jdow, for your very
Just a thought, are there adaptors that
can plug into a say a usb2 port and convert it to a usb3
port or will there be no difference??
Ah, nope - if you have all USB2 devices
on the bus a USB3 port is not a solution except MAYBE in
very marginal cases. If the ELAD is USB 3 (blue tongues)
then it may make a major difference. (White tongues are USB
2. Wikipedia has at least one article that delineates what
the tongue colors mean.)
If the ELAD itself works on USB2 with all the usual "stuff"
on USB 2 then a laptop with some USB3 and some USB2 sockets
should work a treat.
On 20210703 18:45:53, James Niven
Thanks for this information, I actually
forgot how to get to the “write-caching” properties to
make sure nothing had changed, thanks for that.
I did set this way back when I brought
the external hard drive, I just checked the settings and
yep, still good.
It’s funny, I use the same external
hard drive on my overnight recordings from Jaguar Pro and
have no issues with the recordings.
It only seems to be with SDR Console
when recording FM frequencies and store for later playing
that I find the stuttering.
It seems to be what Max and Joanne
suggest, the usb 2 port, should be usb 3 for better
transmission of data.
Is this the age-old "write-caching"
problem, James? It snags me every year or two.
Bring up Properties for your drive in (right-click on it
in Explorer), Hardware tab, highlight the drive,
Properites again, "Change Settings", Policies.
In Removal Policy, choose "Better Performance", and enable
I hope I'm not stating the obvious, hi. (just because
it's never obvious to me..)
At 21:17 2021-07-03, James Niven wrote:
I am trying to work out why my recordings are stuttering
on playback when accessing them from an external hard
There seems to be no issue from what I can see when
playing them back when I record to c: drive.
So, it appears to be an external drive issue maybe or a
setting. I have SDR console version 3.0.28, I am
recording the FM band at 6.144mhz bandwidth with my elad
Any tips on what I should look for? I have had this
before, but I was never able to fix the issue.