User's Guide

6-2 Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 935 MHz
ISSUE DATE REVISION
4 Aug 00 • Changes to the OS(R/T)-3(A/H) Digital board. ECO #599.
R30, R31 & R32 were 332R are now 215R.
• Changes to the OS-3H 406-470 MHz Analog board. ECO # 597.
R48 was 27R4 is now 47R5, R49 was 33R2 is now 10R.
R52 was 49R9 is now Not Installed.
Oct 00 • Added the TBA part numbers for U1- U4 & U18 on the OS-3A 118-
159.4 MHz Analog Board.
Dec 00 • Changes to the OS-3H 29-71.4 MHz Analog Board. ECO #631
R22 eas 475R is now 1k00.
Jan 01 • Change to the OS-3A 118-159.4 MHz Analog Board. ECO #589.
R31 was 100R is now 49R9
• Changes to the OST-3A128 Analog Board.
C35 was 5.6pF is now 3.3pF and R40 was 330R is now 220R.
Feb 01 • Corrected the confusion with D6 & D7 on the OS-3A 118-159.4 MHz
Analog Board parts list.
• Changes to the OS-3A 118-159.4 MHz Analog Board. ECO #634.
C26 was 1nF is now 3.3pF.
• Changes to the OS-3 128 – 174 MHz Analog Board. ECO #635.
C56 was 330pF is now R42 (Select).
Apr 01 • Changes to the OST-3H4xx Analog Board. ECO #619.
C37 – C39 were 1.0µF are now 1.5µF, C45 was 220nF is now 68nF.
C49 was 22nF now 15nF, C60 was 100nF now a zero ohm wire jumper.
R19 was 10k0 is now zero ohm jumper (Both OS(R/T)-3H4xx).
R32 was 5k6 is now 6k2 and R36 was 2k2 is now 1k2.
Jan 03 • Updated all sections to include an extra band from 928 - 935 MHz
• Added Schematics, CLD and Parts lists for the OST-3H932 module