Operations Manual, HPA2, Compact Outdoor SSPA
208495 REV B
123
The Compact Outdoor SSPA responds with the following Response String: (refer to
Table
11-6
)
Byte Position Byte Value (Hex) Description
1
AA
Frame Sync Byte 1
2
55
Frame Sync Byte 2
3
A
Destination Address of PC request originator
4
5
Source Address of Amplifier sending Response String
5
0
Protocol Version Compatibility Field must always be 0
6
6F
Echo of originator’s Request ID byte
7
3
Command field for “Get” type request
8
0
“SSPA Settings” tag indicates which data from respondent is required in
response frame
9
0
Data Address field omitted and replaced with Error Status code. 0 in this
field indicates the absence of errors.
10
A
Data Length field indicates how many data bytes of the “SSPA Settings”
requested from the amplifier.
11
0
Data field 1 contains data element 1 of “System Conditions” data type
12
255
Data field 2 contains data element 2 of “System Conditions” data type
13
1
Data field 3 contains data element 3 of “System Conditions” data type
14
255
Data field 4 contains data element 4 of “System Conditions” data type
15
0
Data field 5 contains data element 5 of “System Conditions” data type
16
255
Data field 6 contains data element 6 of “System Conditions” data type
17
5
Data field 7 contains data element 7 of “System Conditions” data type
18
50
Data field 8 contains data element 8 of “System Conditions” data type
19
0
Data field 9 contains data element 9 of “System Conditions” data type
20
3
Data field 10 contains data element 10 of “System Conditions” data type
21
8F
Arithmetic checksum of bytes 3 through 20