126
208495 REV B
Operations Manual, HPA2, Compact Outdoor SSPA
The Compact Outdoor SSPA responds with the following 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 SSPA sending Response String
5
0
Protocol Version Compatibility Field must always be 0
6
6F
Echo of the originator Request ID byte
7
3
Command “Get response” designator
8
3
Data tag “3”, Systems Conditions access
9
0
Error status; 0 = no errors
10
12
Data length is 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; Temp. = 28 °C
15
0
SSPA Fault Status, Low Byte (see
Table 11-9, data address 3
)
16
80
SSPA Fault Status, High Byte (see
Table 11-9, data address 3
)
17
C8
SSPA Attenuation Level, Low Byte
18
0
SSPA Attenuation Level, High Byte; Attenuation = 200, or 20.0 dB
19
82
Forward RF Output, Low Byte
20
1
Forward RF Output, High Byte; Forward RF = 386, or 38.6 dB
21
B6
SSPA DC Current, Low Byte
22
2
SSPA DC Current, High Byte; DC Current = 694, or 69.4 Amps
23
67
SSPA Regulator DC Voltage, Low Byte
24
0
SSPA Regulator DC Voltage, High Byte; Voltage = 103, or 10.3 Volts
25
95
SSPA Power Supply Voltage, Low Byte
26
0
SSPA Power Supply Voltage, High Byte; Voltage = 149, or 14.9 Volts
27
D3
SSPA Gate Drive Voltage, Low Byte
28
FF
SSPA Gate Drive Voltage, High Byte; Voltage = -45, or -4.5 Volts
29 4C
Arithmetic
checksum of bytes 3 through 28
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