Rainbow Electronics RFM12B - Manual (Page 4)

RFM12B
Tel: +86-755-82973806 Fax: +86-755-82973550 E-mail: [email protected]
http://www.hoperf.com
f
LO
frequency
(9MHZ crystal
used)
433 MHz band,2.5KHz step
868 MHz band,5KHz step
915 MHz band,7.5KHz step
387.22
774.43
810.65
395.7
6
791.5
6
836.3
4
MHz
f
LO
frequency
(11MHZ crystal
used)
433 MHz band,2.5KHz step
868 MHz band,5KHz step
915 MHz band,7.5KHz step
473.26
946.53
990.79
483.7
3
967.4
6
1022.
2
MHz
BW Receiver
bandwidth
mode 0
mode 1
mode 2
mode 3
mode 4
mode 5
60
120
180
240
300
360
67
134
200
270
350
400
75
150
225
300
375
450
KHz
t
lock
PLL lock time After 10MHz step hopping, frequency
error <10 kHz
30 us
tst, P
PLL startup time
With a running crystal
oscillator
200 300 us
BR Data rate With internal digital demodulator 0.6 115.2 kbps
BR
A
Data rate With external RC filter 256 kbps
BER 10 -3 , BW=134KHz,BR=1.2kbps, 433MHz band -109 -100
BER 10 -3 , BW=134KHz,BR=1.2kbps, 868MHz band -105 -100
P
min
sensitivity
BER 10 -3 , BW=134KHz,BR=1.2kbps, 915MHz band -105 -100
dBm
AFC
range
AFC working
range
df
FSK
: FSK deviation in the received
signal
0.8*
df
FSK
RS
A
RSSI accuracy ±5 dB
RS
R
RSSI range 46 dB
C
ARSSI
ARSSI filter 1 nF
RS
STEP
RSSI
programmable
step
6 dB
RS
RESP
DRSSI response
time
RSSI output high after valid ,
CARRSI=5nF
500 us