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Avionic Installations Service/Parts Manual
CODE SIM.
SW. POS.
1
2
3
4
5
6
7
8
9
10
A1
A2
A4
B1
B2
B4
C1
C2
C4
D4
PULSE POSITION
A1
A2
A4
1
0
0
0
1
0
001
000
000
000
000
0
0
0
000
000
B1
0
0
0
1
0
0
0
0
0
0
B2
0
0
0
0
1
0
0
0
0
0
B4
0
0
0
0
0
1
0
0
0
0
C1
0
0
0
0
0
0
1
0
0
0
C2
0
0
0
0
0
0
0
1
0
0
C4
0
0
0
0
0
0
0
0
1
0
D4
0
0
0
0
0
0
0
0
0
1
CODE LIGHT ON - 1
CODE LIGHT OFF - 0
FIGURE 3
4.3 Testing of Altitude Reporting - Altimeter in System
To insure the altitude reporting altimeter is encoding properly with
the transponder a short check can be conducted as follows.
a.
Adjust the barometric pressure setting on the altimeter to 29.92
inches of mercury.
NOTE:
The coded altimeter output to the transponder will agree with
the altimeter only when the altimeter is set for 29.92 inches
Hg.
b.
Set the ATC-600 test set mode switch to "A/C Altitude".
c.
Set the transponder select switch to "Standby" position and after
warm up period set select switch to "ALT" position.
d.
Observe the numerical display on the ATC-600 test set and the
altitude on the altimeter.
The altitude displayed on the ATC-600
and the altimeter must agree within ± 120 ft.
Figure 5-6. Cessna 400 Encoding Altimeter (Type EA-401A) Post Installation Checks (Sheet 3 of 3)
5-19/(5-20 blank)
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