https://teknokoodiradio.vuodatus.net/lue/2017/07/sx1278-fast-frequency-hopping

With parameters:

#define F_START 868 // start freq
#define F_STEP 0.025 // 25 kHz step
#define F_CH 40 // channels to rx hop
#define H_DELAY 4

Honeywell wireless doorbell (868.3 MHz FSK) signal followed by Visonic wireless transmitter (868.95 MHz, probably OOK)

scan868.jpgIMG_20170807_132155972.jpgIMG_20170807_132346716.jpg