These connector savers are fairly cheap, like $10, SMA male-female things. The rise is an SD24 TDR step plumbed into an SD30 40 GHz sampling head.
The SD30 connector is actually a 2.4 mm.
I got a bunch of cheap 'n' cheerful Chinese ones for about $1.50 each from eBay. I measured them with callipers before attaching them to my scopes, for sure, but they were in spec and seem to work fine. I haven't TDRed them, but I will.
Sometimes it's almost impossible to remove an SMA without rotating the centre conductor, and that kills them fast.
Cheers
Phil Hobbs
Nearly all of my SMA connectors, adapters, and cables (largely ebay, flea market, and found in a dusty box somewhere) are transparent to an SD24 TDR step. Long cables do get lossy.
The tough transition to make is an edge launch from SMA to a microstrip trace. I've never done one without some sort of bump. I've fot some claimed 26 GHz Johnson/Emerson edge-launch samples coming.
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