M17_ANL_v2

New M17 hotspot/analyser, this time with ADF7021

Schematic

Diagram was not tested yet.

Technical details

M17_ANL_v2 is a radio modem designed especially to support interaction with existing M17 capable radio terminals & repeaters. It also means packet acquisition, for debugging cases or sniffing, just for fun idk. However M17_ANL_v2 can be used to receive and transmit raw digital data - it's by design protocol agnostic.

Parameters

• Operating freqency range is 420MHz to 450MHz (after a few changes also another frequency bands)
• Modulation schemes selectable - 2FSK, 3FSK, 4FSK, MSK and FM (for M17 - 4FSK)
• Output power level is set from -16dbm up to 10dbm (in 0.3125 dB steps)
• Data rate is set from 0.05 up to 25 kbps (for M17 - 9600 bps)
• IF filter bandwidht selectable - 12.5 kHz, 18.75 kHz, or 25 kHz

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Most important ICs used in project

• STM32F303CBT6 - MCU which controls data flow(PC <-> RF TRX), and radio parameters.
• ADF7021 - radio transceiver.

Testpoints description

TestPoint NO	Description	Pin of STM32	Pin of ADF7021
TP1	SPI_SCK	PB13	28
TP2	SPI_MISO	PB14	27
TP3	SPI_MOSI	PB15	26
TP4	SPI_ENABLE	PA8	25
TP5	RF_ENABLE	PA9	24
TP6	DClk	PA6	35
TP7	Data	PA7	34
TP8	SWD	PB0	33
TP9	RF_CLK	PA5	36
TP10	AD	PA2	from Filter 1
TP11	MO	PA3	37
TP12	DA	PA4	to Filter 2
TP13	FMDM	to Filter 1	33
TP14	FMM	from Filter 2	21

Filter 1 - used by ADC, Filter 2 - used by DAC

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