long range mode modulation

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Joined: Fri Oct 15, 2021 10:27 pm

long range mode modulation

Postby romanlh » Mon Jan 24, 2022 7:55 pm

I connected simple power metter to ESP32 devkit and found that peak level in Long Range mode is twice smaller then in 802.11b mode.
Why? Does LR mode use multiple subcarriers and thus have to lower peak level? Any details on LR mode modulation?

Sensor: http://www.herbert-dingfelder.de/?page_id=68

802.11b mode:
AKIP0022.jpg (74.48 KiB) Viewed 1101 times
LR mode:
AKIP0019.jpg (77.83 KiB) Viewed 1101 times
(ignore smaller pulses, it is response from another module intentionally placed in proximity).

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