Questions about ADRV9029 DPD dpd status

Please make sure that you follow the DPD bring up sequence as mentioned in the DPD user guide.

Have you enabled the carrier at all as the statistics does not show up any powers being read?

Please make sure that the Tx-ORX mapping is correct and TX channel is connected to the configured ORX channel.

Are you loading a DPD model file?

If you are checking in TDD mode, try to check in FDD mode once.

Ramarao said:

Have you enabled the carrier at all as the statistics does not show up any powers being read?

The above RECOMMENDED SEQUENCE FOR ENABLING THE DPD TRACKING CALIBRATION has been applied, but the difference is as follows.
- Step 4: Measure the external path delay using adi_adrv9025_InitCalsRun. But the two functions are not used. (adi_adrv9025_ExternalPathDelaySet(), adi_adrv9025_ClgcExternalPathDelaySet())
- step 11: As it is optional, it was not used in this step.
- step 12: CLGC is not used.
- step 15: CLGC was not used.

Ramarao said:

Have you enabled the carrier at all as the statistics does not show up any powers being read?

LTE20M 9FA was activated and used.

Ramarao said:

Please make sure that the Tx-ORX mapping is correct and TX channel is connected to the configured ORX channel.

Tx-ORx mapping checked. I also checked the Orx input level with rxDecPowerGet().

Ramarao said:

Are you loading a DPD model file?

DPD model file was loaded and used.

Ramarao said:

If you are checking in TDD mode, try to check in FDD mode once.

Currently only using FDD mode.

Please help.

Ramarao said:

Have you enabled the carrier at all as the statistics does not show up any powers being read?

The above RECOMMENDED SEQUENCE FOR ENABLING THE DPD TRACKING CALIBRATION has been applied, but the difference is as follows.
- Step 4: Measure the external path delay using adi_adrv9025_InitCalsRun. But the two functions are not used. (adi_adrv9025_ExternalPathDelaySet(), adi_adrv9025_ClgcExternalPathDelaySet())
- step 11: As it is optional, it was not used in this step.
- step 12: CLGC is not used.
- step 15: CLGC was not used.

Ramarao said:

Have you enabled the carrier at all as the statistics does not show up any powers being read?

LTE20M 9FA was activated and used.

Ramarao said:

Please make sure that the Tx-ORX mapping is correct and TX channel is connected to the configured ORX channel.

Tx-ORx mapping checked. I also checked the Orx input level with rxDecPowerGet().

Ramarao said:

Are you loading a DPD model file?

DPD model file was loaded and used.

Ramarao said:

If you are checking in TDD mode, try to check in FDD mode once.

Currently only using FDD mode.

Please help.

Can you check the respective ORX power by using RXdecpowerget API?

Hope the external path delay cal mask is set as described in the UG

Can you please send us the DPD tracking config. parameters?

Can you please send us the Spectrum plot at the TRX out and PA out as well?

Ramarao said:

Can you check the respective ORX power by using RXdecpowerget API?

Justin.Jung said:

Ramarao said:

Please make sure that the Tx-ORX mapping is correct and TX channel is connected to the configured ORX channel.

Tx-ORx mapping checked. I also checked the Orx input level with rxDecPowerGet().

Ramarao said:

Hope the external path delay cal mask is set as described in the UG

            devicePostMcsInitInst.initCals.calMask = ADI_ADRV9025_EXTERNAL_PATH_DELAY;

            retval = adi_adrv9025_InitCalsRun(adrv9025_device, &devicePostMcsInitInst.initCals);

Ramarao said:

Can you please send us the DPD tracking config. parameters?

            adi_adrv9025_DpdTrackingConfig_t dpdTrackingConfigInst;

            float FULL_SCALE_CODE = 32768;

            int32_t MThreshold_dBFS = -40;

            int16_t DpdLowPowerThreshold_dBFS = -46;

            int16_t DpdLowPowerThresholdORx_dBFS = -36;

            float temp = powf(10, (MThreshold_dBFS / 20.0)) * FULL_SCALE_CODE;

            uint32_t dpdMThreshold_val = pow(temp, 2);

            uint16_t minAvgSignalLevel_val = pow(10, (DpdLowPowerThreshold_dBFS / 20.0)) * FULL_SCALE_CODE;

            uint16_t minAvgSignalLevelOrx_val = pow(10, (DpdLowPowerThresholdORx_dBFS / 20.0)) * FULL_SCALE_CODE;

            dpdTrackingConfigInst.txChannelMask = ADI_ADRV9025_TX2;

            dpdTrackingConfigInst.dpdIndirectRegularizationValue = 20;

            dpdTrackingConfigInst.dpdDirectRegularizationValue = 20;

            dpdTrackingConfigInst.dpdSamples = 16384;

            dpdTrackingConfigInst.dpdMThreshold = dpdMThreshold_val;

            dpdTrackingConfigInst.dpdPeakSearchWindowSize = 65535;

            dpdTrackingConfigInst.dpdUpdateMode = ADI_ADRV9025_DPD_TRACKING_UPDATE_MODE_2;

            dpdTrackingConfigInst.minAvgSignalLevel = minAvgSignalLevel_val;

            dpdTrackingConfigInst.dpdMu = 50

            dpdTrackingConfigInst.minAvgSignalLevelOrx = minAvgSignalLevelOrx_val;

            dpdTrackingConfigInst.dpdFilterSel = 1;

            dpdTrackingConfigInst.enableDirectLearning = 1;

            dpdTrackingConfigInst.dpdIndirectRegularizationLowPowerValue = 20;

            retval = adi_adrv9025_DpdTrackingConfigSet(adrv9025_device, &dpdTrackingConfigInst);

            printf(" DPD Tracking Config Set Result : %d\n", retval);

Please help.

On the sequence, it looks like the DPD reset with LUT restore step is missing after loading the model file and before full DPD reset (Between Step 8 and 9 ). Can you add this and let me know? Below is the typical seq (in brief)

• Load the model
• dpdModelRestoreFromFile(DPD reset with LUT_Restore)
• resetDpdFull (DPD reset with DPD_REset_Full)
• dpdTrackingConfigSet
• runExtPathDelayInitCal(0xF) 
• Give some delay(sleep time)
• getExtPathDelay(Types.adi_adrv9010_TxChannels_e.ADI_ADRV9010_TX1) (Just to verify that the cal was run and path delay value was set)
• dpdTrackingCalEnable

Hi Ramarao/Justin. I am experience same behavior and all looks. How did you solve this?

Thanks in advance.

Its a DPD sequence related issue. Please make sure that the recommended DPD sequence is followed?

Whats the RX channel mask configured? Is it FDD/ TDD; SPI/Pin mode?

Do you get any DPD statistics? Can you share more details?