Si4455-2Wa yLink-DEMO

Rev. 0.1

3

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:

The transmitter can calculate PER using the following data:

The receiver can calculate PER using the following data:

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:

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.

PER

P

TX

P

RX

–

P

TX

---------------------------

100



Where:

PER is the packet error rate (%)

P

P

=