Analog Devices ADRV9001 User Manual page 175

Preliminary Technical Data
Parameter
apdGainStepRecovery
enableHbOverload
hbOverloadDurationCount
hbOverloadThreshCount
hbHighThresh
hbUnderRangeLowThresh
hbUnderRangeMidThresh
hbUnderRangeHighThresh
hbUpperThreshPeakExceededCount
hbUnderRangeHighThreshExceededCount
hbGainStepHighRecovery
Description
The number of indices that the gain index pointer
should be increased in the event of an APD Under
range event occurring in Peak Detect AGC mode.
The step size in dB depends on the gain step
resolution of the gain table (default 0.5dB per index
step).
1: HB Overload Detector enabled
0: HB Overload Detector disabled
The number of clock cycles (at the HB output rate)
within which hbOverloadThreshCnt must be
exceeded for an overload to occur. A HB overload
flag is only raised when the number of these
overloads exceeds
hbUpperThreshPeakExceededCnt or
hbLowerThreshPeakExceededCnt within a gain
update period.
Sets the number of individual samples exceeding
hbHighThresh or hbLowThresh necessary within
hbOverloadDurationCnt for an overload to occur.
The HB overload flag will only be raised when the
number of these overloads exceeds
hbUpperThreshPeakExceededCnt or
hbLowerThreshPeakExceededCnt within a gain
update period.
This sets the upper threshold of the HB detector.
This sets the lower threshold of the HB under range
threshold detectors. Used only when the fast
recovery option of the peak detect AGC mode is
being used.
This sets the middle threshold of the HB under
range threshold detectors. Used only when the fast
recovery option of the peak detect AGC mode is
being used.
Peak Detect Mode: Threshold used for gain
recovery.
Peak Detect with Fast Recovery Mode: This sets the
highest threshold of the HB under range threshold
detectors.
Power Detect Mode: Threshold used to prevent
further gain increases if lowThreshPreventGainInc is
set.
Sets number of individual overloads above
hbHighThresh (number of times
hbOverloadThreshCount was exceeded in
hbOverloadDuractionCount) to cause an HB High
Over Range event. In AGC modes, this will result in a
gain decrement set by hbGainStepAttack.
Sets number of individual overloads above
hbUnderRangeHighThresh (number of times
hbOverloadThreshCount was exceeded in
hbOverloadDurationCount) to cause an HB Under
Range High Threshold Overload Event. In Peak
Detect AGC mode, not having sufficient peaks to
cause the overload is flagged as an under-range
event and the gain is recovered by
hbGainStepHighRecovery.
The number of indices that the gain index pointer
should be increased in the event of an HB Under
Range High Threshold Under Range Event.
Rev. PrC | Page 175 of 338
UG-1828
Default
Max
Value
Min Value Value (TBD)
0 31 0
0 1 1
0 7 1
1 15 1
0 16383 13044
0 16383 5826
0 16383 8230
0 16383 7335
0 255 6
0 255 3
0 31 2