EZRadio-2WayLink-DK

Rev. 0.1

5

2. Range Test Demo

2.1. Basics

As earlier described, the range test demo is used to provide measured results on the quality of the RF link.

The demo uses two RFsticks: one as the ‘transmitter’ (TX) and the other as the ‘receiver’ (RX). Both RFsticks can

be either transmitters or receivers.

The transmitter sends packets to the receiver repeatedly with half second intervals. The packet includes the

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, the packet number is stored.

The receiver then sends back an acknowledge packet (ACK) to the transmitter. The ACK packet also includes the

address and packet number of the received packet.

PER can be calculated with the following equation:

where:

Transmitter can calculate PER using the following data:

Receiver can calculate PER using the following data:

2.2. RF and Packet Parameters

This section provides information on user parameters of the range test demo. All the parameters (excluding fre-

quency band and self node address) can be changed in the demo through its menu system (see section “2.4.

Menu System of the Range Test Demo”). The following parameters are available:



Frequency band (defined by the HW)



Communication frequency



Modulation



Data rate



Output power



Packet length



Maximum number of sent/received packets



Self node address (defined by the HW)



Destination node address

Demo parameters are stored in the MCU’s flash memory and restored after power-on reset. Default values are

loaded if no parameters 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 Suite (WDS). For more information on creating and storing custom RF parameters, refer to

the “WDS User’s Guide for EZRadio Next Generation”.

PER

P

TX

P

RX

–

P

TX

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100

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