My 70911A started reporting errors the other day and tracked it down to the option 005 FM board.
The 300MHz amp on the board takes in a 300 MHz signal at 0 DBm and outputs at 0 DBm. But mine is outputting at -20 DBm.
These boards use 4-pin RF transistors and I have no idea what the part number is, can anyone help?
Thanks
Jim
P.s. I say transistor but know it's an IC Amp something like a MAR-4+, but have no idea.