Products > Test Equipment
Use of the 9kHz to 100kHz range in spectrum analyzers
FlexibleMammoth:
Hi all,
I am planning to get a Spectrum Analyzer/VNA for hobby purposes. For that, I have my eyes on a JDSU JD785 (8GHz SA, 6GHz VNA) or JD745 (4GHz SA+VNA) base station analyzer, because they are "cheap" and pack a lot of features.
I would prefer the 785 for looking at wifi signals, but they are harder to get in EU; additionally, the 745 SA only starts from 100kHz. It is my understanding that they are both not RTSAs, which is unfortunate, but e.g. a siglent R-X series starts at 4k€ for 3.2GHz range (feel free to point me to other RTSAs that include a VNA).
So my question is - what are practical applications of the 9kHz to 100kHz range in spectrum analyzers? Is it a dealbreaker to miss that range?
BR Andreas
radiolistener:
this range is covered with LCR meters
TopQuark:
I have used that range on a spectrum analyser to measure noise PSD of circuits before. I actually wished the lower end could go further down.
VNAs that can work down to 9kHz can be very useful for measuring power delivery networks (PDNs) on PCBs and what not. I wished my VNAs can go that low as well.
FlexibleMammoth:
Thanks for the replies!
Unfortunately, the VNA runs only from 5MHz - a common limitation in these handheld devices. Is there anything I can do with just the SA in these frequency ranges?
Edit - just realized you were talking about SAs in the first paragraph. From my understanding for noise PSD a signal analyzer would be better, as they often run from 20Hz?
TopQuark:
--- Quote ---Edit - just realized you were talking about SAs in the first paragraph. From my understanding for noise PSD a signal analyzer would be better, as they often run from 20Hz?
--- End quote ---
yes, but sometimes you just have to use what you already have, and my Siglent SA will only go down to 9kHz. It still gives reasonably close to theoretical PSD values. :P
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