XE1205
Programmed mode
Sleep
Stand-by
Transmit
NSS_CONFIG
Actual mode
Sleep
TS_OS
Stand-by
TS_STR
Transmit
Figure 20. Sequence from sleep to transmit mode via stand-by mode.
The sequence from transmit to receive mode is shown in Figure 21 . TS_RE is the initialization time of the receiver base
band filter when the frequency synthesizer is enabled. The base band filter initialization and calibration processes occur
when the transceiver switches from transmit to receive.
Programmed mode
NSS_CONFIG
Actual mode
Transmit
Transmit
Receive
Receive
TS_RE
Figure 21 Sequence from transmit to receive mode.
Figure 22 represents the sequence from receive to transmit mode. TS_TR is the initialization time of the power amplifier
if the frequency synthesizer is already enabled:
Programmed mode
NSS_CONFIG
Actual mode
Receive
Receive
Transmit
Transmit
TS_TR
Figure 22: Sequence from receiver to transmitter mode
? Semtech 2008
37
www.semtech.com
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