4455-LED-434-PER SILABS [Silicon Laboratories], 4455-LED-434-PER Datasheet - Page 3

• Manufacturer Part Number: 4455-LED-434-PER
• Manufacturer: SILABS [Silicon Laboratories]

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.
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P
P
P
P
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)
TX
RX
TX
RX
is the packet counter to be included in the packet
is the packet number included in the last received packet
is the number of all the received acknowledge packets
is the number of all received data packets
PER
Where:
PER is the packet error rate (%)
P
P
TX
RX
is the number of sent packets
is the number of received packets
=
P
-------------------------- -
TX
P
–
TX
P
RX
Rev. 0.1

100
Si4455-2WayLink-DEMO
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