Here's a photograph of the input connector and one of the attachments that came with it (which is this unknown connector to SMA converter).

enter image description here


1 Answer 1


They are 50\$\Omega\$ Type N connectors. Typical on Spectrum Analyzers.

The definitive standard is MIL-STD-348.

  • 1
    \$\begingroup\$ Type N is used because it's a really nice controlled impedance connector, and good up into the GHz range -- a plain old BNC is only good up to about 400MHz or so. You don't want to be doing tests and worrying about your connector integrity. \$\endgroup\$
    – TimWescott
    Oct 26, 2021 at 15:03

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