Wavenet Technology BM28001 Wireless OEM Modem Module User Manual Printing

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Document ID	285922
Application ID	t+rZ6qyRrcst1AFN9oHVRw==
Document Description	revised pages re time averaging
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	16.39kB (204841 bits)
Date Submitted	2002-11-26 00:00:00
Date Available	2002-12-02 00:00:00
Creation Date	2002-11-26 09:02:45
Producing Software	Acrobat PDFWriter 4.0 for Windows
Document Lastmod	2002-11-26 09:03:59
Document Title	Printing
Document Creator	MGI Printing
Document Author:	ArtB

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Positioning the Antenna
Positioning the antenna will anect the gain provided by the antenna
The antenna should be orientated so that it provides vertical
polarisation as the DataTAC network is based on vertically polarised
radio-frequency transmission.
The antenna should be located as far fiom the active electronics of the
computing device as possible. Typically, a metal case of a computing
device and its internal components may a mate the signal in certain
directions. This is undesirable as the sensiti ty and transmit
performance of the Boomer ll would be reduced. llnwever, careful use
of metal used for the ground plane for an antenna can improve the
antenna gain and the coverage area for the system.
If your device is designed to sit on a surface. the antenna should be
positioned as far from the bottom of the device as possible. This is to
reduce the radio frequency reflections if the device is placed on a metal
surface.
If your device is hand held or is worn next to the body, the antenna
should be positioned to radiate away from the body.
The integrator should refer to the statement of Compliance on page l2
of this manual and Regulatory Requirements section on page; 23-27
for country requirements.
Source Based Time Averaglng Function
For portable or handheld applications the integrated terminal or host
must comply with OET Bulletin 65 and Supplement C (June 2002)
with respect to Specific Absorption Rate (SAR) requirements.
The Boomer-ll modem module operates on a packet data network
which sets the timing ot‘mos't aspects of the RF signalling protocol.
The shortest transmit event over which the Boomer-ll modem has
control is a transmit transaction which is comprised of a series of
transmit pulses.
For portable or handheld applications a source based time averaging
function has been incorporated in the Boomer-ll modem firmware
This function limits the transmit duty cycle by controlling the timing of
when transmit transactions are initiated and the delay period between
them.
When a data transmission occurs. the actual transmit time is recorded.
Subsequent data transmissions are inhibited until a delay period (idle
time) has elapsed to ensure the average duty cycle of transmissions is
less than the preset “Duty Cycle" limit, Any delayed user data that is to
be transmitted will be buffered until it is pemtiltod to he sent.
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The algorithm for the Source Based Time Averaging transmit control
and the relevant parameters are given below:
a ldlciTime = DutyJ-‘actor ‘ Transmit_Duration
D Duty Factor = (100 ~ Dity_Cycle%) / Duty_Cycle%
u Duly_Cycl=% = Preset limit for SAR compliance
Nu the transmit
Id|e_1’rms “plied?
Transmit det-
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Sal Idle_T|m= =
Dmy_Factor '
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Source Bned Time Averaging Trllllll'l". Algorithm
The Boomer-ll modem module has an overall transmit Duly Cycle
limitation of 30% (maximum) to physically protect the modem
hardware.
The default Duty Cycle preset in the factory al the time of manufacture
is lO‘Vul Other duty factors and SAR evaluation must be lddressed at
the time ufOEM integration into any final host product and is the
responsibility of the OEM Integrator.
The algorithm and preset Duty Cycle is recorded in the module
firmware at the time of manufacture and tunnel be lllered by the aid
“SGT.
w-unm Tun-mm u ‘ auzworzwrz?

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File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : No
Creator                         : MGI Printing
Create Date                     : 2002:11:26 09:02:45
Title                           : Printing
Author                          : ArtB
Producer                        : Acrobat PDFWriter 4.0 for Windows
Modify Date                     : 2002:11:26 09:03:59-05:00
Page Count                      : 2

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