RFM95 datasheet(45/121 Pages) HOPERF

tên linh kiện	RFM95

Giải thích chi tiết về linh kiện	Low Power Long Range Transceiver Module

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Page 45

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

It is therefore important to note that the setting of OokFixedThresh will be application dependant. The following procedure

is recommended to optimize OokFixedThresh.

Set RFM96/7/8 in OOK Rx mode

Adjust Bit Rate, Channel filter BW

Default OokFixedThresh setting

No input signal

Continuous Mode

Monitor DIO2/DATA pin

Increment

OokFixedThresh

Glitch activity

on DATA ?

Optimization complete

Figure 14. Floor Threshold Optimization

The new floor threshold value found during this test should be used for OOK reception with those receiver settings.

Optimizing OOK Demodulator for Fast Fading Signals

A sudden drop in signal strength can cause the bit error rate to increase. For applications where the expected signal drop

can be estimated, the following OOK demodulator parameters OokPeakThreshStep and OokPeakThreshDec can be

optimized as described below for a given number of threshold decrements per bit. Refer to RegOokPeak to access those

settings.

RFM95 bảng dữ liệu(PDF) 45 Page - Shenzhen Hope Microelectronics Co., Ltd.