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Can anyone confirm whether the JDSU 745A can do vector signal analysis (clock recovery and constellation diagrams) of FSK, PSK and QAM signals? Someone was trying to convince me that it could, but I saw little evidence that it would meet my needs.
C30 and R14 are some kind of feedback circuit. Likely to flatten the frequency characteristic. The bias resistor for Q1 is R8. Unfortunately I don't know the capacitor values. For C29 100nf will likely work fine.
Quote from: colorado.rob on October 23, 2023, 03:58:12 pmCan anyone confirm whether the JDSU 745A can do vector signal analysis (clock recovery and constellation diagrams) of FSK, PSK and QAM signals? Someone was trying to convince me that it could, but I saw little evidence that it would meet my needs.You have to keep in mind that this is a cellular base station analyser. So as long as your signal kind of falls into a category that resembles a cellular communication signal, then you might get lucky. But you'll also need to find a unit which has the analysis options installed. Judging from the manual the J745A can't do much clock recovery as the manual says the J745A needs to be synchronised to the cell tower in order to get the best results.