Analog Devices ADRV9001 User Manual page 124

Reference Manual
FREQUENCY HOPPING
Transmitter Only with Short Propagation Delay
There is a restriction to how long before the hop edge the transmitter setup falling edge must come. For profiles with very short propagation
delays, this means the interface is on longer than required for valid data to reach the analog front end.
Figure 121 shows one option to pad the data with zeros or a known pattern and start transmitting as soon as the interface is enabled. This way,
although the interface is on earlier, the transmitted data is a known pattern when it reaches the analog front end.
Figure 122 shows an alternative to hold off from the transmission until t
transmitter DMA involves to delay the transmitting data until the analog front end is ready.
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Figure 120. Tx Only with Long Propagation Delay for PLL Retune Mode
Figure 121. Padded Data Method for Tx Only Hopping with Short Propagation Delay
prior to the analog front end is enabled. Here, the FPGA
propagationDelay
ADRV9001
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