SX1232
WIRELESS & SENSING
DATASHEET
4.2.1. Transmitter Startup Time
The transmitter startup time, TS_TR, is calculated as follows, in when FSK modulation is selected:
1
TS _TR = 5μs +1.25× PaRamp + ×Tbit
2
,
where PaRamp is the ramp-up time programmed in RegPaRamp and Tbit is the bit time.
In OOK mode, this equation can be simplified to the following:
1
TS _TR = 5μs + ×Tbit
2
4.2.2. Receiver Startup Time
The receiver startup time, TS_RE, only depends upon the receiver bandwidth effective at the time of startup. When AFC is
enabled (AfcAutoOn=1), AfcBw should be used instead of RxBw to extract the receiver startup time:
Table 21 Receiver Startup Time Summary
RxBw if AfcAutoOn=0
RxBwAfc if AfcAutoOn=1
TS_RE
(+/-5%)
2.6 kHz
3.1 kHz
2.33ms
1.94ms
1.56ms
1.18ms
984us
791us
601us
504us
407us
313us
264us
215us
169us
144us
119us
97us
3.9 kHz
5.2 kHz
6.3 kHz
7.8 kHz
10.4 kHz
12.5 kHz
15.6 kHz
20.8 kHz
25.0 kHz
31.3 kHz
41.7 kHz
50.0 kHz
62.5 kHz
83.3 kHz
100.0 kHz
125.0 kHz
166.7 kHz
200.0 kHz
250.0 kHz
84us
71us
85us
74us
63us
TS_RE or later after setting the device in Receive mode, any incoming packet will be detected and demodulated by the
transceiver.
Rev 3 - August 2012
Page 39
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