Thank you for the feedback. Our bad luck was that the only “fast” PC is the one that we used for the development of the application.
We need a 70KHz span for our application. Does it make sense to use a wider span and then ignore points that we don’t need? Could we have resolution troubles?
What is the minimum span value that allows us to have a stable sweep time?

We are using the following settings:
Center 869.525000 MHz
Span 70.000000 kHz
RBW 100.000000 Hz
VBW 100.000000 Hz

Both the PC have a I7-6700T @ 2.80GHz processor.
Please have attached images containing the Spike screenshot and system data.

Some additional useful (I hope) information:
– disabling spur reject the sweep time decrease to ~50ms on both the PC
– the sweep time on the PC 2 (the one with the higher time) changes systematically opening and closing Skype (!!): 400ms with Skype open, 375ms with Skype closed
– the sweep time on the PC 2, SOMETIME, decrease to 200ms (like the PC 1) for a few seconds, then goes up again to 400ms for minutes
– we have checked the sweep time on other 2 PC with similar hardware, and the sweep time is ~400ms on them too: we have just 1 “luky” PC with a small sweep time

Attachments:

You must be logged in to view attached files.

I have a C# application that is using the SDK for the SA44B.

What issues are you facing?

Any idea about this issue?

Hello Andrew,
thank you for the fast reply.

We have just checked using Spike with the same sweep configuration, and we see a similar behavior (200ms vs 400ms).

We have the same OS (Windows 10 Pro 64bit), the same active antivirus (Symantec), we have tried to change the power plan on both PCs with no effect, both the PC are desktop.

Any other thing that we can check?

Thank you Andrew, I am able to do marshalling.

Regards,
Filippo Marchese

[Author]

Posts