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96 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA
10.5 Examples
10.5.1 Example 1
Table 10-10 shows an example of a communication exchange between a PC and Compact
Outdoor Amplifier.
● SSPA Network Address = 5
● Host Computer Network Address = 10
● Request ID = 0x6F
Byte
Position
Byte
Value
(Hex)
Description
1 AA Frame Sync Byte 1
2 55 Frame Sync Byte 2
3 5 Destination Address of RCP unit
4 A Source address of Request originating PC Host
5 0 Protocol Version Compatibility Field must always be 0
6 6F Request ID byte is set by originator, will be echoed back by respondent
7 1 Command field for “Get” type request
8 0 “SSPA Settings” tag indicates which data from respondent required in response
frame
9 1 Data Address field indicates the beginning data address inside of the “SSPA Set-
tings” data set to 1 (first element)
10 A Data Length field indicates how many data bytes of the “SSPA Settings” requested
from the amplifier
11 8A Arithmetic checksum of bytes number 3 through 10
Table 10-10: Example 1 Host PC Request String