Dimensions = mm (inches)
Electrical Schematic – ATU-HP Automatic Antenna Tuning Unit (NAT40A)
Issue 2.0
Not to Scale
Figure SD-1
Sheet 1 of 1
OR
10
35V
J3
0.1
J4
P4
P1
N/C
N/C
N/C
J2
J2
P1
P1
P2
P3
J1
LIMIT
MIN R
MAX R
MIN L
LIMIT
A4
1
4
***
400
400
400
ASSY
400
400
T1
400
T2
1T
1T
1T
11
1T
1T
1T
10
1T
1T
1T
1T
1T
1T
1T
1T
1T
6
1T
1T
1T
5
1T
1T
1T
1T
1T
1T
1T
1T
1T
1
1T
1T
L1
L1
J2
OR
0.1
C10
N/C
N/C
LIMIT
LIMIT
MAX L
2
3
6
5
A3
2
9
8
11
11
1T
10
10
1T
1T
1T
6
6
1T
5
5
1T
1T
1T
1
1
1T
11
10
6
5
1
SPLIT PHASE
230VAC
SINGLE PHASE
115VAC
SINGLE PHASE
RF INPUT
R2
1000
TEMP PROBE PWB
A5
S1950200 V1
25
13
12
GND
FAN 2
FAN SUPPLY
GND
FAN 1
FAN SUPPLY
LINE
LINE
GND
LINE
GND
4
2
1
4
2
1
2
4
2
3
1
4
5
CONTROL/
MONITOR
1
A1
1
U2
TRAVEL
MECHANICAL
DETECTOR
(R LIMIT)
DETECTOR
U1
INDICATOR
MECHANICAL
U2
DETECTOR
LIMIT SWITCH PWB
(L LIMIT)
VARIABLE MATCHING
M
400
225W
R1
INSTALLED ON TEST.
INSTALLED ON TEST.
DENOTES TB3
DENOTES TB1
400
225W
R5
225W
R4
225W
R3
RESISTOR
1T
7
1T
8
1T
1T
1T
4
1T
5
***
225W
R8
225W
R7
13
M
1T
9
12
8
1T
1T
1T
3
7
4
1T
1T
2
ANTENNA
TO ANTENNA
RF OUTPUT
230VAC
2
1
3
t°
TMP36G
U3
C9
TACH
TACH
B2
B3
GND
LINE
6
5
5
3
4
3
3
1
3
1
5
J2
3
2
4
ATU
PWB
2
E1
DETECTOR
E2
INDICATOR
U1
LIMIT SWITCH PWB
TRAVEL
A2
TRANSFORMER ASSY
+
-
B1
+
-
B1
DENOTES TB2
3
4
1T
2
9
1
1T
3
6
1
7
13
9
8
12
M
9
8
12
1T
4
3
7
3
4
7
1T
2
2
8
9
12
3
4
7
2
R3
10K
22
12
10
11
4
4
2
3
16
1
15
14
NEUTRAL
5
13
12
11
18
17
NEUTRAL
8
7
C6 *
C1 *
4 J1
12 J1
10 J1
4
3
11
225W
R6
225W
R2
SERIES CONNECTION SHOWN.
PARALLEL CONNECTION SHOWN.
SEE BELOW FOR SERIES CONNECTION.
BOLT
R1
1000
C8
23
21
6
NEUTRAL
9
10
7
20
19
8
C14 *
C4 *
C5 *
C12*
C11*
C2 *
CAPACITOR BANK
2 J1
* DENOTES FREQUENCY DEPENDENT PART
1 J1
13 J1
A2A1
6
9
1
2
4
3
ATIR0911S
8
SEE ABOVE FOR PARALLEL CONNECTION.
J1
W1P1
GROUND PLANE
GROUND
C13 *
C3 *
1
2
4
3
ATIR0911S
1
2
4
3
ATIR0911S
1
2
4
3
ATIR0911S
**DENOTES LINK INSTALLED IN PLACE OF C7 FOR NDB OPERATION. C7 INSTALLED FOR NDGPS OPERATION
MATCHING TRANSFORMER T2 OPTION NOT USED.
DENOTES LINKED WHEN RESISTOR ASSY A3 AND
