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Operations Manual, HPA2, Compact Outdoor SSPA 205486 REV F 101
Table 10-16. Example 3 SSPA Response String
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 the respondent
5 0 Protocol Version Compatibility Field must be always 0
6 6F Echo of the Originator’s Request ID byte
7 3 “Get Response” designator
8 3 Data Tag 3. System conditions access
9 0 Error status “0”, No Errors
10 12 Data length - 18 bytes
11 47 Tempcomp attenuator DAC value Low Byte
12 2 Tempcomp attenuator DAC value High Byte, DAC Value=583
13 1C SSPA internal core temperature Low Byte
14 0 SSPA internal core temperature High Byte, Temperature=28 C
15 0 SSPA Fault status Low Byte. See Table 10-15.
16 80 SSPA Fault status High Byte. See Table 10-15.
17 C8 SSPA Attenuation Level Low Byte
18 0 SSPA Attenuation Level, High Byte, Atten. Level=200 – 20.0 dB
19 82 Forward RF output Low byte
20 1 Forward RF output High byte, Forward RF=386 – 38.6 dBm
21 B6 SSPA DC Current Low Byte
22 2 SSPA DC Current High Byte, Current=694 – 69.4 Amps
23 67 SSPA Regulator DC voltage Low Byte
24 0 SSPA Regulator DC voltage High Byte, Voltage=103 – 10.3 Volts
25 95 SSPA Power Supply voltage Low Byte
26 0 SSPA Power Supply voltage High Byte, Voltage=149 – 14.9 Volts
27 D3 SSPA Gate Drive Voltage Low Byte
28 FF SSPA Gate Drive Voltage High Byte Voltage= -45 – (-4.5) Volts
29 4C Arithmetic checksum of bytes 3 to 28