Preliminary Technical
Data
Rev. PrA | Page 24 of 82
dpdMetric
adi_adrv9025_DpdMetric_e
One of the seven DPD stability metrics described in the
previous section
comparator
adi_adrv9025_DpdComparator_e
The user can select a greater than or less than
comparator for defining a fault condition. Eg: The user
can define a fault condition where Tx RMS power is
greater than a certain threshold and ORx RMS power is
lesser than a certain threshold.
threshold0
Int16
Defines a threshold for a lower severity level
threshold1
Int16
Defines a threshold for a higher severity level
persistentCount
UInt16
Persistence count is defined with the expectation that
more aggressive recovery actions will be required in case
the fault conditions persist.
The currently available action list is shown in Table 7. The fault conditions defined in Table 6 can be associated with a recovery
action programmed through the API
adi_adrv9025_DpdRecoveryActionSet()
.
Table 7 ADRV902x Recovery Action Bit-mask Definition
Action Index
Description
Action Word
recoveryAction_0
Abandon update
bit 0
recoveryAction_1
Revert all LUTs to unity
bit 1
recoveryAction_2
Reset DPD adaptation state (internal adaptation statistics, say)
bit 2
recoveryAction_3
HW reset actuator
bit 3
recoveryAction_4
Switch to the maxPower model
bit 4
recoveryAction_5
Switch to some specific recovery model
bit 5
The DPD fault conditions configured in the firmware on startup are listed in
Table 8. Default Definition of Fault Condition Matrix
Metric
Comparator Low Threshold High Threshold Persistent
Count
Mean TU Power (Pre-DPD)
Less Than
-37 dBFS
-46 dBFS
10
Peak TU Power (Pre-DPD)
Less Than
-26 dBFS
-35 dBFS
10
Mean Tx Power (Post-DPD)
Less Than
-37 dBFS
-46 dBFS
10
Peak Tx Power (Post-DPD)
Less Than
-26 dBFS
-35 dBFS
10
Mean ORx power (Post-DPD)
Less Than
-34 dBFS
-43 dBFS
10
Peak ORx power (Post-DPD)
Less Than
-23 dBFS
-32 dBFS
10
Pre-DPD capture Tx to ORx EVM (Direct EVM)
Greater Than 5%
15%
10
Post-DPD capture Tx to ORx EVM (Indirect EVM)
Greater Than 8%
15%
10
Indirect Error
Greater Than 3%
12%
10