Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
Revision History
87
Revision
Date
ECO
Description
1
May 97
n/a
• Issue 1
1
May 97
n/a
• Issue 1
2
Mar 98
547
• Changes to the AM Analog board (OST-3A128) to improve
performance.
C37 was 220nF now 100nF and C40 was 8.2pF is now not installed
C45 was 33nF is now 22nF and C49 was 2.2nF is now 1.5nF
R32 was 33K is now 56K and R36 was 3K3 is now 5K6.
3
Mar 00
565
• Changes to the AM Analog board to improve performance at -40°C.
L4 was 1.5µH is now 3.9µH
572
• Changes to the FM Analog boards to improve manufacturing.
C32 & C33 were 100µF through hole tantalums are now 100µF
surface mount tantalums.
579
• Changes to the OS-3A/H Digital board for compatibility with the new
AM wideband Synthesizers.
Added C15 (10µF) and R41 (221K).
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 for the new AM wideband synthesizer. Wideband referring to
only having to be tune once and working over the whole AM band
(118-138MHz).
(118-138MHz).
4
May 00
603
• Changes to the OS-3H 128-174MHz Analog board.
R29 was 18K2 is now 3K92, U10 was MC145191 is now
MC145193.
609
• Changes to the OSR-3H 128-174MHz Analog board.
R22 was 100R is now 0R0.
601
• Changes to the OS-3A 118-159.4 Analog board.
R42 & R53 were 137K. are now 100K
Jul 00
n/a
• Corrected the SELECT table on the OS(R/T)-3H 128-174MHz
Schematic diagram (section 4.3.3).
Schematic diagram (section 4.3.3).
Aug 00
599
• Changes to the OS(R/T)-3(A/H) Digital board.
R30, R31 & R32 were 332R are now 215R.
597
• Changes to the OS-3H 406-470MHz Analog board.
R48 was 27R4 is now 47R5, R49 was 33R2 is now 10R.
R52 was 49R9 is now Not Installed.
Oct 00
n/a
• Added the TBA part numbers for U1- U4 & U18 on the OS-3A 118-
159.4MHz Analog Board.
159.4MHz Analog Board.
Dec 00
631
• Changes to the OS-3H 29-71.4MHz Analog Board.
R22 eas 475R is now 1K00.
REVISION
HISTORY
Содержание OSR-3H061
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