Preliminary Technical Data UG-1828
Rev. PrC | Page 113 of 338
FREQUENCY HOPPING TIMING
In this section, we will show the timing information for different frequency hopping use cases. It is recommended to also read the Timing
Parameters Control in this document because many of the timing parameters are explained there.
Figure 112. Frequency Hopping Minimum Timing
Table 40. Frequency Hopping Timing Parameters Minimum Timing
Timing Parameter Description Time (µs @ 184.32 MHz)
tNextTxFramePrepare Time required by internal controller to prepare the next Tx frame. Min: 13 µs
tNextRxFramePrepare Time required by internal controller to prepare the next Rx frame. Min: 13 µs
tTxSetupTime (1) Time taken from hop edge to Tx power up if no LO retune is required
and ttxRiseToAnaOn is zero.
Min: 6.7 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: 6.7 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
future releases)
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
For LO Muxing mode, Tx setup falling edge starts the Tx interface. And for LO retune mode, Tx setup rising edge starts the Tx interface.
Figure 113. Frequency Hopping Typical Tx Timing for LO Muxing
24159-590
DWELL
TRANSITION
DWELL
TRANSITION
DWELL DWELL
TRANSITION
TRANSITION
DWELL
TRANSITION
Tx
FRAME
Tx
FRAME
Rx
FRAME
Rx
FRAME
HOP
Tx SETUP
ORx ENABLE
t
NextTxFramePrepare
t
TxSetupTime
t
RxSetupTime
t
hopEdgeToChannelSetupFail
t
hopEdgeToChannelSetupFail
t
ChannelSetupFailEdge
t
ChannelSetupRiseToHopEdge
t
ChannelSetupRiseToHopEdge
t
RxSetupTime
t
TxSetupTime
t
NextTxFramePrepare
t
NextRxFramePrepare
t
NextRxFramePrepare
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
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