Analog Devices ADRV9005 Reference Manual page 345

Reference Manual ADRV9001
ADRV9001 EVALUATION SYSTEM
Figure 330. Initial Calibrations
Receiver and Transmitter Filters
The ADRV9001 evaluation software specifies the custom programmable filter for each channel. These filters are up to 128 taps. The custom
filter must be in the .csv or .txt file format and the coefficients must be 24-bit signed integers with no carriage returns. The SDK has an example
filter .txt file. There is also the option to bypass this filter entirely.
An important thing to note when programming the part is that the calibrations use the carrier bandwidth set by the user. If the bandwidth of the
loaded filter is smaller than the bandwidth of the carrier, then the calibration fails. This is due to the signal being attenuated by the filter. If a
narrower filter is required, it is best to use a wide enough filter when initializing and calibrating, then set the filter to the narrower profile.
The Rx Filters (Figure 331) and Tx Filters (Figure 332 and Figure 334) tabs allow to input programmable FIR filters on the chosen channels. In
the Tx Filters tab, set the interpolations factor.
The Rx Filter tab also shows controls for the "Dynamic Profile Switching" (currently available only on LTE profiles). For more details, see the
Dynamic Profile Switching (DPS) section.
The compute composition filter response shows how the overall filter response is made. It takes some time to compute but gives more
information on how the filter is made.
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