Hello,
I try to repair a IQ modulator from a R&S SMIQ02. At a first look at the components, I can't identify some smd parts. Hope their is someone we came across these parts, and can help me out. I can read the markings on the parts: The first part seems to have the marking "RP11G N580-4" the second part is under a metal part, but reads "N4".
If a search on this "N4" part I only can find the 'NBB-400' and this is a MMIC amplifier DC to 8Ghz. Which I'm not sure if this is right. I can't find anything on the "RP11G N580-4" part.