Fieldfox N9916A with power sensor application installed and operating with U2021XA Peak and Average power sensor.
When a peak power reading is taken it remains on display, but how to reset this peak reading in order to take a fresh reading? Only way i have been able to do this is by disconnecting and reconnecting the USB connector to the Fieldfox.
Thank you, Andrew
Hi Afsi.
Firmware release is A.08.18
Bios Rev 2.4.12P1
Old CPU (original CPU)
Andrew
I believe a # of the fixes went into the firmware that is only supported on the newer CPUs. However, I just tried some peak power measurements with the same firwmare you have and the peak measurements are updating. It takes some time, but it updates. Can you send us the specific sequence where the data is not updated? What happens if you switch to Trace Graph and turn analysis on? Does it update then?
Afsi Moaveni
I left the peak setting on for a while and also returned to it after many minutes using the average setting and the initial peak reading remains fixed.
Trace menu has no options or readings, no trace graph available?
Andrew.
See attached pix
Andrew.
I have experimented with the N9916A some more and the only way the peak reading can be made is by turning averaging off, if averaging is turned on then the first peak reading measured is always displayed unless a higher peak is encountered or the instrument is disconnected from the fieldfox. Clearly unsatisfactory.
Andrew
Ah! You're in power meter mode. I should have asked for clarification on that. When you said U2021XA, I assumed you were in pulse measurement mode. So I can see the issue you are reporting in power meter mode, and have verified that it is fixed on the latest firmware (A.10.xx). However, the latest firmware requires the new CPU. An upgrade path is available to get to the new CPU. (N9910HU-100)
Alternatively, try and download a trial version of the pulse measurement mode option (option 330). I don't see the same issue in pulse mode; it's not as responsive as the fast measurements with the new firmware/new CPU, but it does update. Look for N9916A-330 trial.
https://www.keysight.com/main/editorial.jspx?cc=US&lc=eng&ckey=2223541&nid=-32495.1150124&id=2223541
Happy Holidays,
Afsi Moaveni
Sounds like the cure is US $5,160. For an independent engineer a significant expense!
I think short term the purchase of the BenchVue PM application or perloin of the old “free” PM software may be the most cost effective way to go. I am very disappointed of course, but seems I have no alternative. It would have been nice to have known before purchasing a U2021XA that it would not work as expected with my FieldFox but I suppose I should not have purchased the FieldFox while it was a new product and will now have to pay to he penalty.
Thank you for taking the time to research what is in effect “my problem” now.
Best regards,
Andrew.
Did you try downloading the (free) trial version of the pulse measurement option (330) to see if that solves your problem?
Not tried downloading 330 yet. Waiting to return from Christmas break to Africa where my FieldFox is. I did try turning averaging off and the peak signal was then varying. Will try when i return and have a good signal to measure. Will report back. - thanks.
Andrew.
I have now downloaded trial version of the option 330 pulse measurement which works perfectly in peak and average power modes.
In USB power meter mode (option 302) the peak power mode takes a first reading and this then becomes locked and does not change. If averaging is turned off the peak readings are correct but as soon as averaging is turned on then the very first peak reading made is shown on screen and won’t change unless a higher peak is reading is measured or until the power sensor usb connection is removed and reconnected. ( ie Fieldfox remembers the peak reading only)
I also have the benchvue power meter and this works perfectly.
Andrew
Happy New Year Andrew.
I have sent you a private message.
Afsi Moaveni
Santa Rosa, California
What is the firmware revision of the N9916A? I thought we had fixed this issue. To check firmware,
[System] {Service Diagnostics} {System Information}
Read the third line, firmware release. Should be something like A.08.xx, or A.09.xx.
Also, do you have the new CPU (CPU2) or original CPU. Also, on same page, BIOS rev shows the CPU used in the analyzer.
Afsi Moaveni