Analog Devices ADRV9001 User Manual page 139

Preliminary Technical Data
Parameter
powerMeasurementDelay
rxTddPowerMeasDuration
rxTddPowerMeasDelay
overRangeHighPowerThresh
overRangeLowPowerThresh
overRangeHighPowerGainStep
Attack
overRangeLowPowerGainStep
Attack
feedback_lowThreshold_gainChange
feedback_high_threshold_exceeded
Table 63. adi_adrv9001_PeakDetector_t Structure Definition
Parameter
agcUnderRangeLowInterval
agcUnderRangeMidInterval
Description
Measurement delay to detect power for specific slice of gain
update counter
Following an Rx Enable, the power measurement block can
be requested to perform a power measurement for a specific
period of a frame. This is applicable in TDD modes. This
parameter sets the duration of this power measurement. A
value of 0 causes the power measurement to run until the
next gain update counter expiry.
Following an Rx Enable, the power measurement block can
be requested to perform a power measurement for a specific
period of a frame. This is applicable in TDD modes. This
parameter sets the delay between the Rx Enable and the
power measurement starting on Rx.
Offset (positive sign assumed) from threshold
overRangeLowPowerThresh which defines the outer
boundary on the stable region of the power detect gain
control mode. Typically attack would be set to be larger steps
than when the power measurement is greater than this
threshold.
Threshold (negative sign assumed) which defines the upper
boundary on the stable region of the power detect gain
control mode.
The number of indices that the gain index pointer should be
decreased (gain reduction) in the event of the power
measurement being greater than
overRangeHighPowerThresh.
The number of indices that the gain index pointer should be
decreased (gain decrease) in the event of the power
measurement being less than OverRangeHighPowerThresh
but greater than OverRangeLowPowerThresh.
A pair of DGPIO pins to retrieve the gain change information
and power detector inner low threshold not exceeded status
A pair of DGPIO pins to retrieve the power detector inner
high threshold exceeded status and apd high threshold
counter exceeded status
Description
This sets the time constant (in AGC clock cycles) that
the AGC will recover when the signal peaks are less
than hbUnderRangeLowThresh. Only applicable when
the fast recovery option is enabled in Peak Detect AGC
mode.
This sets the time constant (in AGC clock cycles) that
the AGC will recover when the signal peaks are less
than hbUnderRangeMidThresh. Calculated as
(underRangeMidInterval+1) ×
underRangeLowInterval. Only applicable when the
fast recovery option is enabled in Peak Detect AGC
mode.
Rev. PrA | Page 139 of 253
UG-1828
Max Default
Min
Value Value Value
0 255 2
AGC
clock
cycles
0 65535 0
AGC
clock
cycles
65535 0
0
AGC
clock
cycles
0 15 0
0 127 7
0 31 4
0 31 4
0 9 0
(not (Select (not
assigned) DGPIO assigned)
pins 14
and 15)
0 9 0
(not (Select (not
assigned) DGPIO assigned)
pins 14
and 15)
Default
Max
Value
Min Value Value (TBD)
Depends 65535 50
on hb
detector
settings
0 63 2