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Operations Manual, HPA2, Compact Outdoor SSPA 205486 REV F 97
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 Responding Amplifier
5 0 Protocol Version Compatibility Field must always be 0
6 6F Echo of the Originator’s Request ID byte
7 3 Command field for “Get” type response
8 0 “SSPA Settings” tag indicates which data from respondent included in response
frame.
9 0 Data Address field omitted and replaced with Error status code. 0 in this field indi-
cates absence of errors.
10 A Data Length field indicates how many data bytes of the “SSPA Settings” re-
quested from the SSPA (12 is all available data of “System Conditions” type).
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
The Compact Outdoor Amplifier replies with the response string of Table 10-11.
Table 10-11. Example 1 SSPA Response String