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Semtech
Wireless & Sensing Products
User Guide for the SX1261 and SX1262 Development Kits
Rev 1.1
UG.DEV.SX126x.W.APP
March 2018
4.
PER Demo
A Packet Error Rate (PER) test is a unidirectional test where one kit is configured as a Master and the other as a
Slave. In this case the Master will assume the role of transmitter and the Slave that of receiver. The aggregate
PER of the packets received by the Slave, expressed as a percentage, is calculated and displayed on the receiver
(Slave). Given that this is a unidirectional test, the packet error rate is not displayed on the transmitter (Master).
Press on Demo PER
from the Welcome Display to access this test.
You can change the radio settings from this menu:
Press SETTINGS
to adjust the same radio settings on the Master and the
Slave units. See
Section 6 for more details on the radio settings.
Before starting the test:
-
Place the Slave unit into the desired position
-
Place the Master unit into the desired position
Press SLAVE to toggle the unit to MASTER and vice-versa
To start the PER test:
Press START first on the Slave unit then on the Master Unit
-
Both units will exchange data until you press STOP on either unit.
The reception and transmission of data are indicated by LEDs on each unit.
-
The result of the Demo is displayed on the screen of the Slave unit:
o
Rx OK : number of packets completely received
o
Rx KO: number of packets not completely received
o
Rx PSR: Percentage Packet Success Rate for the last packet exchange
o
Rx PER: Percentage Packet Error Rate for the last packet exchange
o
Last RSSI: Received Signal Strength Indication [dBm]
o
Last SNR: Signal to Noise Ratio for the last packet exchange [dB]
Figure 6: PER Demo Slave Display
Figure 7: PER Demo Master Display
