Analog Devices ADRV9001 User Manual page 120

Reference Manual
FREQUENCY HOPPING
is relative to the hop signal edge after the Rx Setup falling edge. But, for the PLL Retune mode, it is relative to the hop signal edge after the Rx
Setup rising edge.
Table 50. Rx Timing Parameters
Delay Parameter
enableSetupDelay
(t )
rxEnaSetup
propagationDelay
enableRiseToOnDelay
analogGuardTime
enableRiseToAnalogOnDelay
(t )
RxEnaRiseToAnaOn
enableGuardDelay
(t )
RxGT1
enableHoldDelay
(t )
RxEnaHold
TRx Timing
Figure 115 shows the typical TRx timing for the PLL Mux mode.
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Figure 114. Frequency Hopping Typical Rx Timing for PLL Mux Mode
Descriptions
Time taken for the ADRV9001 to
power up the analog. This time may
or may not include the PLL retuning
time.
Delay from antenna to the Rx
interface.
Delay between the hop edge and
LNA power-up. If the ADRV9001 is
not controlling the LNA power-up,
this variable is not needed.
Minimum time between the hop
edge and analog power-up to
prevent Rx and Tx FE being
powered up at the same time.
Delays the power up of the AFE
relative to the hop edge.
Delay between the hop edge and
first valid data received over the air.
Delay between the hop edge and
disabling of the Rx interface.
Bounds
N/A
N/A
Min: enableRiseToOnDelay + ena-
bleSetupDelay
Max: -
N/A
Min: analogGuardTime
Max: -
Min: enableRiseToOnDelay + ena-
bleSetupDelay
Max: 0
propagationDelay
ADRV9001
Notes
No PLL retuning @ hop edge: ~7 µs
PLL retuning @ frame boundary: ~ PLL_retune_time
This parameter is profile and board layout dependent.
Not necessary to configure the ADRV9001, but can be
necessary to derive the other timing parameters
~0.15 µs
The minimum time of this delay is the
analogGuardTime.
Not used currently but can be used to delay starting the
tracking algorithms until the first valid data is received
over the air.
At the end of an Rx frame, or a sequence of Rx frames,
the interface can be left on, even into the next frame, to
allow propagation delay.
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