Preliminary Technical
Data
Rev. PrA | Page 20 of 82
Figure 23. DPD Dynamics and Tx Low Power Threshold
Transmitter M-Threshold
The M-Threshold is a max power threshold specified by adi_adrv9025_DpdTrackingConfig_t.dpdMThreshold that is valid only in
DPD mode 2 operation (adi_adrv9025_DpdTrackingConfig_t.dpdUpdateMode = ADI_ADRV9025_DPD_MODE2). There are two
DPD models (M-Table, C-Table) that the DPD tracking calibration maintains and updates. The DPD model update mechanism in
DPD mode 2 operation is described in Table 4. Note that the switching mechanism between the models M-Table (high power), C-
Table (low power) and U-Table (unity gain) is based on the 10 ms integrated rms power of the DPD actuator input samples,
similar to the mechanism described in DPD Characterization for optimizing M-Threshold section.
The dynamics of the DPD based on the Tx baseband input level with the M-Threshold taken into consideration is shown in Figure
24.
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