I am trying to refurbish an electronic personal locator beacon (for rescue callouts for stranded hikers/sailors/pilots).
To do so to spec most devices require a GPS signal test (activation). There is a BNC output to couple directly to a receiver for analysis that emergency is being squawked.
But to avoid a false emergency, the device must be shielded.
Is there a standard construction or recommended material for shielding 406.1MHz transmitter? Would a metal box with BNC feed through be sufficient?