Analog Devices ADRV9002

UG-1828 Preliminary Technical Data
Rev. PrB | Page 94 of 277
Table 37. Frequency Hopping Timing Parameters Minimum Timing
Timing Parameter Description Time (µs @ 184.32 MHz)
tNextTxFramePrepare Time required by ARM to prepare the next Tx frame. Min: 30 µs
tNextRxFramePrepare Time required by ARM to prepare the next Rx frame. Min: 20 µs
tTxSetupTime (1)
Time taken from hop edge to Tx power up if no LO retune is required
and ttxRiseToAnaOn is zero.
Min: 5 µs
tTxSetupTime (2)
Time for a consecutive Tx frame. Performs Tx attenuation ramp and LO
muxing. The Tx analog is not fully powered up or down and digital
remains on.
Min: 4 µs
tRxSetupTime (1)
Time taken from hop edge to Rx power up if no LO retune is required
and trxRiseToAnaOn is zero.
Min: 7 µs
tRxSetupTime (1) Time taken for a consecutive Rx frame. Min: 2 µs
thopEdgeToChannelSetupFall
Minimum time between the hop edge and when the channel setup can
go low. This restriction only applies for Tx.
0.42 µs
tChannelSetupRiseToHopEdge
Minimum time required between the channel setup rising edge and
the hop edge.
10 µs (at least >3 µs – this time
will be improved in day 13)
tChannelSetupFallToHopEdge
Minimum time required between the channel setup falling edge and
the hop edge. This restriction only applies to Tx.
0.42 µs
Tx Timing
To allow propagation delays greater than the transition time, the ADRV9001 uses the falling edge of the Tx setup pin to enable the Tx
interface.
24159-490
FRAMING ON AIR
FRAMING AT BBIC
PIN: HOP
PIN: Tx SETUP
Tx INTERFACE
Tx ANALOG POWER
Tx ON: ANTENNA SWITCH
DWELL
DWELL
VALID DATA
NOT ON AIR
TRANSITION
t
TxPD
t
TxEnaRise2AnaOn
t
TxEnaSetup
Figure 94. Frequency Hopping Typical Tx Timing
Table 38 Tx Timing Parameters
Delay Parameter Descriptions Bounds Notes
enableSetupDelay
(ttxEnaSetup)
Time taken for Navassa
to power up the analog
front end. This time
may nor may not
include PLL retuning
time.
N/A No PLL retuning @ hop edge: 5 µs
PLL retuning @ frame boundary: LO_retune_time
propagationDelay
Delay from ADRV9001
digital interface to
antenna.
N/A
This time is not used for any delays in ADRV9001.
The user should enable the interface and begin
data transmission enough time prior to the end
of the transition time to account for the
propagation delay.
enableRiseToOnDelay
Delay between hop
edge and antenna
switching to Tx
channel.
Min: 0
Max: Transition time
If ADRV9001 is not controlling the antenna
switch, this parameter is not needed except to
determine other parameters.
Typically, the enableRiseToAnalogOnDelay +
enableSetupDelay will be the transition time, or
transition time + guard time.