EZR-LEDK2W-434 Datasheet, PDF (3/14 Pages) Silicon Laboratories – Si4455 EZRADIO® TWO-WAY LINK DEMO KIT

Si4455-2WayLink-DEMO
2. Range Test Demo
2.1. Basics
As it was stated above range test demo is used to provide measured results on the quality of the RF link.
The demo uses two RFstick one of them as the ‘transmitter’ (TX) other as the ‘receiver’ (RX). Both RFsticks can be
either transmitters or receiver.
The transmitter sends packets to the receiver repeatedly with half second interval. The packet includes address of
the transmitter and number of the sent packet. The packet number increments from packet to packet.
The receiver receives the packet and checks its address. If their addresses match packet number is stored. The
receiver then sends back an acknowledge packet (ACK) to the transmitter. ACK packet also includes the address
and the packet number of the received packet.
PER can be calculated with the following equation:
PER
=
P_{-----T---X-----–----}P_{----R----X--  100}
P_TX
Where:
PER is the packet error rate (%)
P_TX is the number of sent packets
P_RX is the number of received packets
The transmitter can calculate PER using the following data:
P_TX is the packet counter to be included in the packet
P_RX is the number of all the received acknowledge packets
The receiver can calculate PER using the following data:
P_TX is the packet number included in the last received packet
P_RX is the number of all received data packets
2.2. RF and Demo Parameters
This section provides information on the user parameters of the range test demo. All the parameters (excluding
frequency band) can be changed in the demo through its menu system (see "2.4. Menu System of the Range Test
Demo" on page 6). The following parameters are available:
Frequency band (defined by the HW)
Communication frequency (selected by the user)
Node address (selected by the user)
Modulation (selected by the user)
Data rate (selected by the user)
Demo settings are stored in the MCU’s flash memory and restored after power on reset. Default values are loaded
if no settings were previously stored in the flash.
It is also possible to define custom RF parameters for communication. Custom parameters can be stored with the
Wireless Development Suit (WDS). For more information on creation and storage of custom parameters, refer to
the WDS User’s guide for EZRadio Next Generation.
Rev. 0.1
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