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AGC

Thread Summary

The user reports that the AGC does not operate when APDLOWERCOUNT > 8 or HBUPPERCOUNT > 12, as observed in the instantaneous power of the signal at the end of the Rx datapath. The support engineer requested more details on the test conditions and AGC configuration, specifically whether Peak Detect Mode or Peak/Power Detect Mode is used. The user confirmed testing in Peak Detect Mode and that the AGC does not operate under these conditions.
AI Generated Content
Category: Software
Product Number: ADRV9002
Software Version: 28.0.0

BUGS

I have conducted numerous measurements and noticed the following constraints-limitations:

1)APDLOWERCOUNT: If apdlowercount>8 the AGC doesn't operate:

  

2) HBUPPERCOUNT: If hbuppercount > 12 AGC doesn't operate:

The figures above present the instantaneous power of the signal at the end of Rx datapath. 

Edit Notes

Detectors crucial constraints
[edited by: gEorge2025 at 2:56 PM (GMT -5) on 20 Feb 2026]
Parents
  • Hi Vanitha, I provide you with more information here:

    APDLOWTHRESHEXCCOUNT
    fast attack = enabled
    fast recovery = enabled
    apd = enabled
    hbpd = enabled
    power_detector = disabled
    Peak_Overload_Threshold_dBFS = -9
    Peak_Underload_Threshold_dBFS = -15
    attack/recover steps = 0.5 dB
    gain update period = 50.5 us

    apdlowthreshexccount=3,8 & hbupperthreshexccount=3

    HBUPPERTHRESHEXCCOUNT

    fast attack = enabled
    fast recovery = enabled
    apd = enabled
    hbpd = enabled
    power_detector = disabled
    Peak_Overload_Threshold_dBFS = -5
    Peak_Underload_Threshold_dBFS = -13
    attack/recover steps = 0.5 dB
    gain update period = 50.5 us

    hbupperthreshexccount=12,13 & apdlowthreshexccount=3

Reply
  • Hi Vanitha, I provide you with more information here:

    APDLOWTHRESHEXCCOUNT
    fast attack = enabled
    fast recovery = enabled
    apd = enabled
    hbpd = enabled
    power_detector = disabled
    Peak_Overload_Threshold_dBFS = -9
    Peak_Underload_Threshold_dBFS = -15
    attack/recover steps = 0.5 dB
    gain update period = 50.5 us

    apdlowthreshexccount=3,8 & hbupperthreshexccount=3

    HBUPPERTHRESHEXCCOUNT

    fast attack = enabled
    fast recovery = enabled
    apd = enabled
    hbpd = enabled
    power_detector = disabled
    Peak_Overload_Threshold_dBFS = -5
    Peak_Underload_Threshold_dBFS = -13
    attack/recover steps = 0.5 dB
    gain update period = 50.5 us

    hbupperthreshexccount=12,13 & apdlowthreshexccount=3

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