Analog Devices ADRV9001 User Manual page 121

Reference Manual ADRV9001
FREQUENCY HOPPING
Figure 115. Frequency Hopping Typical TRx Timing for PLL Mux Mode
For the TRx operation, because a hop edge can mark both the start and end of an receiver or transmitter frame, the ADRV9001 guarantees that
the receiver and transmitter front ends are not powered up at the same time.
To achieve this, the ADRV9001 enforces a minimum setting for "RxRiseToAnaOn", specified by "analogGuardTime", to ensure that the receiver
front end is powered up after the transmitter front end is powered down.
No minimum setting for "TxRiseToAnaOn" is required. This is because the receiver front end is always powered down before the transmitter
front end power up routine starts, and no extra delay is required.
Figure 116. Requirement of RxRiseToAnaOn When Switching from Tx to Rx Hopping Frame
PLL Retune
In the PLL Retune mode, the time to the start of the Rx/Tx analog front end being powered up is the maximum of t and t .
pllRetune chRiseToAnaOn
Figure 117. PLL Retune
analog.com Rev. 0 | 121 of 351