Analog Devices ADRV9001 User Manual page 119

Reference Manual
FREQUENCY HOPPING
Table 49 summarizes the Tx timing parameters.
Table 49. Tx Timing Parameters
Delay Parameter
enableSetupDelay
(t )
txEnaSetup
propagationDelay
enableRiseToOnDelay
enableRiseToAnalogOnDelay
(t )
TxEnaRiseToAnaOn
enableHoldDelay
enableFallToOffDelay
Receiver Timing
Figure 114 shows the typical Rx timing for the PLL Mux mode. For the PLL Retune mode, the timing diagram is similar, as the Rx Setup rising
or falling edge does not control the Rx interface. Instead, the timing of Rx interface is relative to the hop signal edge. For the PLL Mux mode, it
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Figure 113. Frequency Hopping Typical Tx Timing for PLL Retune Mode
Descriptions Bounds
Time taken for the ADRV9001 N/A
to power up the analog front
end. This time may or may not
include the PLL retuning time.
Delay from ADRV9001 digital N/A
interface to antenna.
Delay between hop edge
Min: 0
and antenna switching to
Max: Transition time
transmitter channel.
Delays the power up of the
Min: 0
AFE relative to the hop edge.
Max: enableRiseToOnDelay - en-
ableSetupDelay
Not used in frequency NA
hopping. Delay from hop edge
and transmitter interface being
disabled.
Delay between the hop NA
edge and powering down
the analog and transmitter
antenna switch. Not used in
frequency hopping.
ADRV9001
Notes
No PLL retuning @ hop edge: ~5 µs
PLL retuning @ frame boundary: ~PLL_retune_time
This time is not used for any delays in the ADRV9001. Enable
the interface and begin data transmission ample time prior to
the end of the transition time to account for the propagation
delay.
If the ADRV9001 is not controlling the antenna switch, this pa-
rameter is not needed except to determine other parameters.
Typically, the enableRiseToAnalogOnDelay + enableSetupDe-
lay is the transition time, or transition time + guard time.
Use this parameter to delay the transmitter analog power up
if the transition time is greater than the analog power up time.
Also use this to delay the analog power up depending on
propagation delay requirements.
Hop edge indicates the end of the frame on air. The datapath
and interface are not kept on beyond this point.
Hop edge indicates the end of frame on air. The analog and
transmitter antenna switch can be powered down immediately.
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