Working on a repair project (LeCroy WavePro 7200 timing board) and have two RF packages I've been unable to track down part numbers for - there are quite a few in the path and it's looking like at least one is going to need to be replaced.
Both are 4 pin SMD packages of a familiar shape, the white package is probably ceramic (sounds different when bumped with the tweezers), but the markings are cryptic. _1 for the first black plastic amp (two of them are the first two stages in the path), then S1 for the white ceramic packages of which there are several stages and then a few as a distribution amplifier at the end. The VCO feeding the first stages tops out at 3GHz, and hooked up to the SA, both probing the VCO output, the amplifier stages, and hooked directly to the output of the board I'm seeing 2.43GHz and its second harmonic, so I figure the amps could be good up to about 5GHz (one other transistor I've ID'd near the VCO is rated to 5GHz.
Ideas on what the parts are or a good place to go looking? The markings seem so generic that almost everything comes up in a simple google (especially S1 when searching for RF related stuff...), and I haven't been able to find another reference to the board or trying to repair it.