Analog Devices ADRV9002 User Manual

Preliminary Technical Data UG-1828
Rev. PrC | Page 75 of 338
power up begins immediately after TX_ENABLE rising edge. The parameter, enableRiseToOnDelay, could also be set to 0, in this case,
the antenna is switched to a transmit channel, as soon as analog power up completes. For a more deterministic delay between transmit
enable rising edge and antenna switch time, enableRiseToOnDelay should be set to a value greater than or equal to
enableRiseToAnalogOnDelay + enableSetupDelay
In such a case, after raising Tx_enable, some guard data must be sent over the interface to make sure all valid transmit data is transmitted
on air. Based on the length of the user guard time and transmit timing parameter configurations, only a part or none of the guard data is
transmitted to the air.
When the frame ends, enableFallToOffDelay could be set in a similar way as discussed in Use Case 1.
Note ADRV9001 currently is not controlling the antenna switch, therefore it is the user’s responsibility to switch the antenna on and off at
the accurate time. As a recommendation, the antenna should be switched on after analog power up and switched off before analog power
down.
Figure 64. Transmit Timing Parameters (t
TxPD
< t
TxEnaSetup
)
Receive Timing Definition
Receive timing parameters define the events that take place in order from the start of reception at the air to the end of reception when the
receive burst is sent through the ADRV9001 data port to the BBIC.
Figure 65. Receive Timing Parameters
As shown in Figure 65, similarly, a receive burst is composed of a series of valid receive data with user’s option of padding guard data at
the beginning and end of the valid data. Similar to transmit, based on the timing parameters configured by the user, it is the user’s
USER PROVIDES ADRV9001
ADRV9001 PROVIDES USER
HELPER PARAMETERS
TX ON: ANTENNA SWITCH
FRAMING ON AIR
FRAMING AT BBIC
PIN: TX_ENABLE
TX_INTERFACE
TX ANALOG POWER
t
TxGT
t TxEnaFall2Off
t
TxEnaHold
t
TxPD
t
TxEnaRise2AnaOn
=0
t
TxEnaRise2On
VALID DATA
VALID DATA
t
TxPD
t
TxPD
24159-056
t
TxEnaSetup
USER PROVIDES NAVASSA
ADRV9001 PROVIDES USER
HELPER PARAMETERS
RX_INTERFACE
FRAMING ON AIR
FRAMING AT BBIC
PIN: RX_ENABLE
RX ON: LNA POWER OUT
RX ANALOG POWER
t
RxPD
t
RxPD
t
RxGT
t
RxPD
t
RxGT
24159-057
t
RxEnaHold
t
RxEnaFall2Off
RX
RX
VALID DATA
t
RxEnaRise2On
t
RxPD
t
RxEnaSetup
t
RxEnaRise2AnaOn
t
RxPD

Analog Devices ADRV9002 Specifications

General

Brand	Analog Devices
Model	ADRV9002
Category	Transceiver
Language	English