Semtech SX1280 - GFSK Modulation; Ranging Modem; Figure 16: GFSK Radio Settings Display; Figure 17: Ranging Modem Radio Settings Display

Wireless & Sensing Products
Development Kit User Guide Rev.1.0
UG.DEV.SX1280-1.W.APP February 2017
13 of 15
Semtech
GFSK Modulation 7.3.
The radio settings available for
GFSK modulation are:
- The Frequency (
Freq) as described in Section 7.5
- The Transmission Power (Tx Power): in steps of 1 dBm between -18 dBm
and +13 dBm
- Param 1: choose a data rate and an associated bandwidth (BW)
- Param 2 : Modulation Index (Mod. i) between 0.35 and 4
- Param 3: Bandwidth-Time bit period product (BT) of either 1, 0.5 or OFF
- Payload: size of the payload between 12 and 248 bytes
Ranging Modem 7.4.
The radio settings available for the
Ranging Modem are:
- The Frequency (
Freq) as described in Section 7.5
- The Transmission Power (Tx Pow): in steps of 1 dBm between -18 dBm and
+13 dBm
-
Param 1: choose a Spreading Factor between SF5 and SF10
-
Param 2 : choose a BandWidth (BW) of either 400 kHz, 800 kHz or 1.6 MHz
-
Param 3: The Coding Rate (CR) of the Forward Error Correction applied to
the packet, of either CR 4/5, 4/6,4/7, 4/8 or CRLI 4/5, 4/6, 4/7
- Payload: size of the payload between 12 and 248 bytes
- The button BEST SET selects the best settings for ranging
From this menu you can also access the
Ranging Settings as in Section 5.
Figure 16: GFSK Radio Settings Display
Figure 17: Ranging Modem Radio Settings Display