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RFM95 Datasheet(PDF) 51 Page - HOPE Microelectronics CO., Ltd.

Part No. RFM95
Description  Low Power Long Range Transceiver Module
Download  121 Pages
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Maker  HOPE [HOPE Microelectronics CO., Ltd.]
Homepage  https://www.hoperf.com/
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 51 page
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Page 51
RFM95/96/97/98(W)
Tel: + 86-755-82973805
Fax: + 86-755-82973550
E-mail: sales@hoperf.com http:/ / www.hoperf.com
WIRELESS & SENSING
PRELIMINARY
DATASHEET
4.2.5.1. Transmitter Startup Time
The transmitter startup time, TS_TR, is calculated as follows in FSK mode:
TS _ TR = 5
μs +1.25× PaRamp +
1
×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:
TS _ TR = 5
μs +
1
×Tbit
2
4.2.5.2. 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 68 Receiver Startup Time Summary
RxBw if AfcAutoOn=0
RxBwAfc if AfcAutoOn=1
TS_RE
(+/-5%)
2.6 kHz
2.33 ms
3.1 kHz
1.94 ms
3.9 kHz
1.56 ms
5.2 kHz
1.18 ms
6.3 kHz
984 us
7.8 kHz
791 us
10.4 kHz
601 us
12.5 kHz
504 us
15.6 kHz
407 us
20.8 kHz
313 us
25.0 kHz
264 us
31.3 kHz
215 us
41.7 kHz
169 us
50.0 kHz
144 us
62.5 kHz
119 us
83.3 kHz
97 us
100.0 kHz
84 us
125.0 kHz
71 us
166.7 kHz
85 us
200.0 kHz
74 us
250.0 kHz
63 us
TS_RE or later after setting the device in Receive mode, any incoming packet will be detected and demodulated by the
transceiver.




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