Our SSA3021X finally arrived today. I’d like to be able to do rough first pass EMC assessments and have a variety of current probes, H/B-field probes and antennas to suit. Unfortunately, the best option I found for a sub-GHz antenna has a 75
output while the SSA3021X has a 50
input.
When I skimmed the manual prior to purchase I noted it has an option to select a 75
source. So my vague, hopeful plan was to snip off the antenna’s existing connector, attach an N-type and be done with. Now I read closer I see the option only changes the
calculation performed for power, not the impedance of the termination.
What am I likely to suffer if I do simply change the connector, with no effort applied to matching? Having the 50/75 selection option in the SA software seems to suggest there’s a suitable use case of some sort, but I’m not sure if what I have in mind is problematic.
We’re only really going to be interested in repeatable,
relative measurements, from about 50kHz to 800kHz. We’ll still defer to a test house for absolute measurements. Will a matching adapter make much difference? Are we best to use a 75
N-type, or will a 50
do, or is it irrelevant given the receptacle on the SA is 50
anyway?