Analog Devices ADRV9001 User Manual page 324

Reference Manual
ADRV9001 EVALUATION SYSTEM
There is a frequency offset correction option to change the frequency on the air without reprogramming the chip.
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Pressing the play symbol moves the ADRV9001 to the transmit state and starts a process where selected data files for the Tx1 and Tx2
are sent to the ADRV9001. The data is then stored on the Xilinx platform motherboard RAM and the RAM pointer loops through the data
continuously until Stop is pressed.
To use the transmit data file feature, save the transmit data in a file with the .txt or .csv extension. The data samples must be either complex
(real and imaginary) or real-only, and must be Q1.15 fixed point integers. Note that in the "TX Direct Modulation" mode, the data sample must
be Q4.12 fixed point integers. The data samples must have the following format.
If the data is only real, remove the imaginary column, with only one column of real samples.
For example, in the case of DMR FM/FSK direct modulation, use only real data samples, in which case, the data has only one column. The
maximum number of samples that can be transmitted from the evaluation platform FPGA is 2097088.The length of the TX transmit data must
be multiples of 64. The data file is played continuously. Therefore, the data is phase-continuous.
Real | Imaginary
----------|-----------
I1 | Q1
I2 | Q2
I3 | Q3
I4 | Q4
. | .
. | .
Receiver Operation
The Receive tab opens a window, as shown in
its time domain waveform. When the multiple receiver inputs are enabled, select the desired data to display in the "Spectrum" plot using the
checkboxes below it.
In the TDD operation, the receiver data displays only when the enabled receiver is high. It does not display the data gap between the TDD time
slots.
Once the Receive tab is open, do the following:
Check the RF receiver carrier frequency in MHz.
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analog.com
Figure 307. Transmit Data Tab
Figure 308. The upper plot displays the FFT of the received input data and the lower plot shows
ADRV9001
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