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Agilent N4000-90001 N4000A, N4001A, 4002A SNS Noise Sources Service Manual

Programmed Test Sources PTS 1986 Frequency Synthesizers Catalog.

Weinschel Engineering 50-10,500 MC Modulator RF Sources Power Supply Manual 1959

HP 83400-90001 1973 Model 83004A 83401A Lightwave Sources Oper & Service Manual.