Using an ohmmeter isn't going to tell you much beyond that you don't have a open winding. Hopefully your continuity tester didn't put much more than 30ma through the windings or you may have damaged it.
According to
the datasheet it looks like a 1:4 RF transformer.
If you had 2 of them, you could put them back to back and test them with a standard 50 ohm RF sig gen and 50 ohm power meter @ 10Mhz. Or a VNA if you had one of those. (Split the insertion losses in half because there's two of them)
If you just have one transformer, since it's a
1:4 1:2 turns ratio with a primary impedance of 50 ohms. that means the secondary should be
800 ohms 200 ohms (RF impedance
not DC resistance). So you could load the secondary with an
800 ohm 200 ohm resistor, generate an RF signal, measure the RF voltage (with an RF voltmeter) on the primary and secondary sides to see the
1:4 1:2 ratio to get a basic go/no-go test. Or use a VNA to check SWR on the 50 ohm side, and add/remove the
800 200 load on the secondary to verify functionality.
NOTE: Edited to correct my impedance ratio mistake as pointed out by Bud...