RFM66W Datasheet, PDF (28/87 Pages) List of Unclassifed Manufacturers – 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver

WIRELESS & SENSING
RFM66W
DATASHEET
RX input level (Pin)
AgcThresh3 < Pin <= AgcThresh4
AgcThresh4 < Pin <= AgcThresh5
AgcThresh5 < Pin
Gain
Setting
G4
G5
G6
LnaGain
„100‟
„110‟
„111‟
Relative LNA
Gain [dB]
-24 dB
-26 dB
-48 dB
NF
[dB]
26
34
44
IIP3
[dBm]
5
10
10
3.5.3. Enabling the Demodulation
At receiver start up, the AGC and AFC features are preformed before providing reliable demodulated data to FIFO or DATA
pin. Table 16 hereafter allows the user to set under which criteria he likes to start demodulating data.
Table 16 Data Output Conditions.
* Data ouput conditions
None (immediate)
PreambleDetect
Rssi
PreambleDetect & Rssi
StartDemodOnRSSI
0
0
1
1
StartDemodOnPreamble
0
1
0
1
The flowchart of the following figure shows the processing events of AgcAutoOn, AgcOnPreamble and AfcAutoOn control
bits at receiver starts up. Finally, when processing events are done and the data output conditions are verified according to
Table 16, reliable data starts to be demodulated.
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