C O B O S p A Divisione 3B6 WED WED UserMan

N. Rev Nota di revisione: Data: Progettista: Approvatore:

0 First Release 19/02/13 Cappelli V.

WED Manual

Creato / Created
CAPPELLI V.

Rif. Codice / Cod. Ref. Descrizione / Description

C.O.B.O. S.p.A. – Divisione 3B6
Via Sivo, 74 – 28053 Castelletto Ticino (NO) Italy
Ph. [phone] – Fax [phone]
Web: www.3b6.it – [e-mail]

Controllato / Checked Approvato / Approved

MANUALE UTENTE / USER MANUAL: WED

Nome File / File Name

Gruppo / Group
WED

WED_MANUAL

Rev. Addax
00

Data / Date
19/02/2013

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MANUALE UTENTE: WED USER MANUAL: WED

Description

The WED is a battery powered wireless transmitter that can be used to identify
an extension without intelligence. If it is properly installed on the extension,
when it senses movement and/or vibrations, it sends via Radio an unique
identification number.

Radio Parameters

The Radio Front-end is Texas Instruments CC2500 and this is radio parameters
summary (refers to component datasheet for more info on parameters):

- Carrier freq. = 2480MHz (Base freq. 2433MHz, Ch. 235, spacing 200kHz)

- Modulation format = MSK

- Phase transition time = 0

- Data rate = 250kbps

- TX power = +1 dBm (maximum available)

- Preamble count = 6 Bytes

- Whitening = false

- Address config = No address check

- Device address = 0

- Manchester enable = false

- Packet length = Variable (length configured by first byte after sync word)

- RX filter BW = 541.666667kHz

- Sync word = D3h (SYNC1) 91h (SYNC0)

- Sync word qualifier mode = 30/32 sync word bits detected

Transmitted Packet Format

Totally, a transmitted packet is 34 bytes long.
Header consists of 6 bytes Preamble, 2 bytes Sync word and 1 bytes for
Payload length; payload is 23 bytes long, and 2 bytes CRC is also added at the
end:

6 bytes 2 bytes 1 byte 23 bytes 2 bytes

Preamble Sync Word Payload length Payload CRC

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