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RF64W Datasheet(PDF) 26 Page - HOPE Microelectronics CO., Ltd.

Part # RF64W
Description  Ultra-Low Power Integrated 300-510MHz Transceiver
PDF  76 Pages
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Manufacturer  HOPE [HOPE Microelectronics CO., Ltd.]
Direct Link  https://www.hoperf.com/
Logo HOPE - HOPE Microelectronics CO., Ltd.

RF64W Datasheet(HTML) 26 Page - HOPE Microelectronics CO., Ltd.

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ADVANCED COMMUNICATIONS & SENSING
Page 26 of 76
RF64
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com
Actual
Theoretical
450
Butterworth Filter's BW, FSK
BW
BW
400
350
300
250
200
150
100
50
0
0
2
4
6
8
10
12
14
16
Val (RXParam_ButterFilt) [d]
Figure 18: Butterworth Filter's Actual BW
Error! Reference source not found. suggests filter settings in FSK mode, along with the corresponding passive
filter bandwidth and the accepted tolerance on the crystal reference.
3.4.6. Channel Filters Setting in OOK Mode
The center frequency, fo, is always set to 100kHz. The following chart shows the receiver bandwidth when
changing RXParam_Butterfilt bits, whilst the polyphase filter is activated.
Polyphase Filter's BW, OOK
450
Actual
Theoretical
BW
BW
400
350
300
250
200
150
100
50
0
0
2
4
6
8
10
12
14
16
Val (RXParam_ButterFilt [d]
RXParam_PolypFilt="0011"
Figure 19: Polyphase Filter's Actual BW
Error! Reference source not found. suggests a few filter settings in OOK mode, along with the corresponding
passive filter bandwidth and the accepted tolerance on the crystal reference.
3.4.7. RSSI
After filtering, the In-phase and Quadrature signals are amplified by a chain of 11 amplifiers, each with 6dB gain.
The outputs of these amplifiers are used to evaluate the Received Signal Strength (RSSI).
3.4.7.1. Resolution and Accuracy
Whilst the RSSI resolution is 0.5 dB, the absolute accuracy is not expected to be better than +/- 3dB due to process
and external component variation. Higher accuracy whilst performing absolute RSSI measurements will require
additional calibration.
3.4.7.2. Acquisition Time



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