DE DANIELSELECTRONICSEnhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 470 MHz 6-16 REVISION HISTORYISSUE DATE REVISION1 May 97 • Issue 12 Mar 98 • Changes to the AM Analog board (OST-3A128) to improve performanceECO #547.C37 was 220nF is now 100nF and C40 was 8.2pF is now not installedC45 was 33nF is now 22nF and C49 was 2.2nF is now 1.5nFR32 was 33kΩ is now 56kΩand R36 was 3k3Ω is now 5k6Ω3 Mar 00 • Changes to the AM Analog board to improve performance at -40˚C.ECO #565.L4 was 1.5μH is now 3.9 μH• Changes to the FM Analog boards to improve manufacturing. ECO #572C32 & C33 were 100μF through hole tantalums are now 100μF surfacemount tantalums• Changes to the OS-3A/H Digital board for compatibility with the new AMwideband Synthesizers. ECO #579.Added C15 (10μF) and R41 (221kΩ).JU1 was added and is installed for AM modules only.PCB, DIGITAL, OS-3H/P SYNTH was version 2 now version 3.• Added the new component layouts, schematic diagram and parts lists forthe new AM wideband synthesizer. Wideband referring to only having tobe tune once and working over the whole AM band (118-138 MHz).
