I have downloaded the latest version, 3.4.1 . I am capturing a FS connection, where the analyzer has been connected to a new PC (the USB analyzer is the only application it runs).

I am now getting "Capture stopped - 1480A FIFO Full".

Please advise.
dd.

This is a new message added to the 3.4.1 software to let the user know what caused the capture to end. For some reason, your Analysis PC is not emptying the hardware SDRAM FIFO fast enough which causes the SDRAM to fill up and ultimately the capture to stop. The other type of "Capture Stopped' type is a capture stopped via the 'Stop' button in the GUI.

It is interesting that you manage to fill up the SDRAM FIFO since you are only capturing a FS link. This seems to indicate that your Analysis PC link for some reason is too slow.

What device are you using to generate the data?
Are you using a high-speed Analysis PC Host controller card? What is the performance when connecting an external harddisk and reading data from it? Check throughput with the Performance Monitor.
Could you please post or email the .usb file (email to support @ international Test instruments . com).

I have looked into this some more. It looks like this could happens in FS mode because of a large number of NAK'ed IN Transactions. A large number of NAK'ed IN Transactions causes high CPU utilization that likely steal CPU cycles away from the capture thread that grabs the data from the 1480A and places it on disk for parsing.

Try to not display NAK'ed IN Transactions by checking 'Hide NAKed IN Transactions' in the Filter Protocol Items dialog. We are looking into whether we can increase the priority of the capture thread such that this doesn't occur. This thread already runs at elevated priority so this should not happen but we'll see what we can do.

Version 3.5.2 of the 1480A application has improved data upload speed. It has been tested okay up to approximately 15MB/s on the link under test. If higher bandwidth than this is captured, then the 1480A FIFO may fill up and the capture will be stopped automatically.