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Blaze ASV-2 Operating Manual
Page 7
mil/-, four digit VSI reading right
justified zero padded in ft/min, X,
checksum, carriage return
The checksum is a simple modulo 256 sum
of the binary values of the individual
characters. The checksum is sent as two
characters in hexadecimal format
Microair UAV
9600
STX,a,=, five altitude digits right justified
zero padded, ETX
[STX]a=02372[ETX]
STX=0x02
ETX=0x03
CR=0x0D
Test Alt Encoder:
This is a handy function to test the ASV-2 transponder interface once the installation has been completed. The serial
output will output specific altitudes which can then can be used to test the serial RS232 output and the parallel gillham
output if using a CNV-ALT converter. The ASV-2 will resume the normal output of the indicated altitude upon exiting the
test function.
The following codes are outputted:
Altitude
D4
A1
A2
A4
B1
B2
B4
C1
C2
C4
-1000ft
0
0
0
0
0
0
0
0
1
0
-900ft
0
0
0
0
0
0
0
1
1
0
-700ft
0
0
0
0
0
0
1
1
0
0
-400ft
0
0
0
0
0
0
1
0
1
1
-200ft
0
0
0
0
0
1
1
0
0
1
800ft
0
0
0
0
1
1
0
0
0
1
2800ft
0
0
0
1
1
0
0
0
0
1
6800ft
0
0
1
1
0
0
0
0
0
1
14800ft
0
1
1
0
0
0
0
0
0
1
30800ft
1
1
0
0
0
0
0
0
0
1
Each altitude reporting code line must be tested for integrity of connection if at any time the aircraft connections to the
transponder or altitude data source have been removed and reconnected. Integrity of the connections may be verified by
performing a test of mode C function of the transponder system.
Warning:
Do not use this function while in flight as incorrect altitude information will be sent to
the transponder.