SOUTHERN AVIONICS COMPANY
Model SA100 Dual
2-21
Theory of Operation, Radiobeacon
Figure 2-11. Keyer Code Schematic
CLOCK 5V
CODE TRAIN OUTPUT 5V
KEYER 5V
+12V
+5V
GND
+12V
CODE TRAIN OUTPUT
LOAD / SHIFT
KEYER
CLOCK
CLOCK 5V KEYER 5V
CODE TRAIN OUTPUT 5V
LOAD / SHIFT 5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+12V
+5V
+12V
NOTES 1. THIS DRAWING NO. SEP09602 REV. E. 2. TITLE: KEYER CODE SA PCB SCHEMATIC. 3. ASSEMBLY DWG. NO. SAP09602. 4. ALL RESISTORS 1/4W, 5%, UNLESS NOTED. 5. ALL CAPACITORS IN uF, UNLESS NOTED. 6. C14, CR1, Q2, R1, R7 NOT USED THIS ASSEMBLY.
+
C3 6.8
+
C3 6.8
R3 1M
R3 1M
C7 0.1
C7 0.1
C5 0.1
C5 0.1
R10 100K
R10 100K
14
15
U1FU1F
AI
3
BI
5
CI
7
DI
9
EI
11
FI
14
MODE
13
AO
2
BO
4
CO
6
DO
10
EO
12
FO
15
VDD
16
VCC
1
VSS
8
U6 1U450400
U6 1U450400
5
4
U1BU1B
C12 0.1
C12 0.1
C9 1.0
C9 1.0
C2 1.0
C2 1.0
R6 1.8M
R6 1.8M
9
10
1
8
U1D
1U404900
U1D
1U404900
C8 0.1
C8 0.1
DS1
1DL64530
DS1
1DL64530
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
P1
GOLD FINGERS (22X)
P1
GOLD FINGERS (22X)
A
1
B
2
CLK
8
CLR
9
QA
3
QB
4
QC
5
QD
6
QE
10
QF
11
QG
12
QH
13
VCC
14
GND
7
U2
1U741641
U2
1U741641
9
10
11
12
13
U3B
1U408200
U3B
1U408200
C13 1.0
C13 1.0
CEXT
14
REXT/CEXT
15
A
1
B
2
CLR
3
Q
13
Q
4
+5V
16
GND
8
U4A
1U742213
U4A
1U742213
C6 0.1
C6 0.1
2
3
4
5
1
14
7
U3A
1U408200
U3A
1U408200
C4 0.1
C4 0.1
3
2
U1AU1A
C1 0.1 80V
C1 0.1 80V
AI
3
BI
5
CI
7
DI
9
EI
11
FI
14
MODE
13
AO
2
BO
4
CO
6
DO
10
EO
12
FO
15
VDD
16
VCC
1
VSS
8
U5 1U450400
U5 1U450400
11
12
U1EU1E
C11 0.1
C11 0.1
R8 100K
R8 100K
R4 470K
R4 470K
Q1
1T371100
Q1
1T371100
IN
1
OUT
3
GND
2
U7 1U780500
U7 1U780500
7
6
U1CU1C
R9 22K
R9 22K
R5 500K
R5 500K
CEXT
6
REXT/CEXT
7
A
9
B
10
CLR
11
Q
5
Q
12
+5V
16
GND
8
U4B
1U742213
U4B
1U742213
R2 150
R2 150
C10 0.1
C10 0.1
Summary of Contents for SA100
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