Forums › SA Series Discussions › big amplitude discrepancy, SA124A
- This topic has 2 replies, 3 voices, and was last updated 7 years, 6 months ago by Justin Crooks.
rikrafParticipantrikraf September 18, 2015 at 2:08 pm
I’ve had an SA124A and used it sporadically for a couple years. I find today a huge discrepancy in measured power: a 450MHz sine wave, as measured by my 500MHz BW oscilloscope at 40mv rms, -15dBm, measures +10.5dBm on my SA124A, using default settings, a 25dB discrepancy. In the course of exploring this, I installed the current “Spike” sw, previously I’d used the SignalHound software, but both show similar numbers.
Exploring farther, I find a -30dBm signal (as measured on the scope) measures differently depending on the SA124 reference level:
ref level power at 450MHz
AndrewModeratorAndrew September 21, 2015 at 8:21 am
What you are describing sounds like faulty hardware, (bad RF attenuator/RF input/etc.) Please contact us by phone at 1-800-260-TEST or email email@example.com and we can discuss it further and discuss possible options for repair if we determine it is necessary.
Justin CrooksModeratorJustin Crooks September 21, 2015 at 1:23 pm
I emailed you the firmware upgrade to 3.03. If that doesn’t work, it may require repair.
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