OL2385SWUG datasheet(49/64 Pages) NXP

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NXP Semiconductors

OL2385SWUG

SIGFOX software driver

OL2385SWUG

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User guide

Rev. 2.1 — 6 April 2018

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6. Choose Static frequency calibration (Optional, see the section Controlling OL2385

using terminal program): Type

22, and then press Enter; Type 1 or 2, and then press

Enter; Type

frequency offset value, and then press Enter.

7. Choose Send test mode: Type

14, and then press Enter; type 0 as test mode, and

then press Enter; type number of frames as test mode config and press Enter. Check

the section Testing for P1 SIGFOX certification (SFXIQ tool) for details about test

modes.

7.3.5 LBT testing for RCZ3

This functionality is only tested for ARIB standard in RCZ3 devices for the Listen Before

Talk feature. It means that the device should listen to the 200 kHz SIGFOX band during

a sliding window set before starting to send a SIGFOX frame on radio. If the channel is

clear (below a certain threshold of signal level, typically –80 dbm) during the continuous

minimum carrier sense time (cs_min = 5 ms), the frame can be sent. Otherwise, it

continues to listen to the channel until the expiration of the carrier sense maximum

window timer. If the timer has expired, the device can retry to send the frame until the

maximum number of attempts has been reached. With that being said, it is important to

note that each SIGFOX send payload command actually sends the same payload on

three different frames on three different frequencies. These frames are called frame 1,

frame 2 and frame 3. The first frame is attempted first to be successfully sent. If the first

frame itself fails the transmission after trying the maximum number of times, frame 2

and frame 3 are not sent. Otherwise, frame 2 and frame 3 are sent with the same carrier

sensing procedure. The only difference is the carrier sensing maximum window timer

runs for both frame 2 and 3 together instead of individually.

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