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Operating Manual

n920BT

900 MHz Spread Spectrum OEM Transceiver

Revision 0.10

,

September 5, 2013

#17, 2135 – 32

nd

Ave N.E.

Calgary, Alberta T3K 4Z4
Phone: (403) 248-0028
Fax: (403) 248-2762

www.microhardcorp.com

Microhard Systems Inc.

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Содержание n920BT

Страница 1: ...Manual n920BT 900 MHz Spread Spectrum OEM Transceiver Revision 0 10 September 5 2013 17 2135 32nd Ave N E Calgary Alberta T3K 4Z4 Phone 403 248 0028 Fax 403 248 2762 www microhardcorp com Microhard Sy...

Страница 2: ...IONAL WARRANTY Indemnification The Purchaser shall indemnify Microhard Systems Inc and its respective directors officers employees successors and assigns including any subsidiaries related corporation...

Страница 3: ...nnas require installation preventing end users from replacing them with non approved antennas Antennas not listed in the tables must be tested to comply with FCC Section 15 203 unique antenna connecto...

Страница 4: ...ights ii n920BT Regulatory Requirements iii CONTENTS IV 2 GENERAL 1 2 0 PRODUCT OVERVIEW 1 2 1 OUTPUT POWER LEVEL 2 3 INSTALLATION 4 3 0 OVERVIEW 4 3 1 ESTIMATING THE GAIN MARGIN 4 3 2 ANTENNAS AND CA...

Страница 5: ...e transmission within a public license exempt band of the radio spectrum1 this means that it can be used without access fees such as those incurred by cellular airtime a serial I O data port with hand...

Страница 6: ...sensitive receiver can operate with very low power levels so it is recommended that the lowest power necessary is used using excessive power contributes to unnecessary RF pollution Ideally you should...

Страница 7: ...used for this transmitter must be installed to provide a separation distance of at least 23 cm from all persons with the maximum allowable antenna gains of 1 5 dBi Quarter Wave 2 dBi Rubber Ducky 5 1...

Страница 8: ...wledge of the equipment being deployed The following four factors make up a system gain calculation 1 Transmitter power 2 Transmitter gain transmitting antenna gain minus cabling loss between the tran...

Страница 9: ...ystem gain and path loss Referring to the same example suppose the path loss is 100 dB the gain margin would be 40 dB which is more than adequate for reliable communication Path loss is a very complic...

Страница 10: ...rocedure for installing cabling and antennas for use with the N920BT module 3 2 1 Internal Cabling The most common method for installing the module is to run a cable from the module s MMCX connector t...

Страница 11: ...The most effective protection against lightning is to install two lightning surge arrestors one at the antenna the other one at the interface with the equipment The surge arrestor grounding system sho...

Страница 12: ...suitable Choose a Yagi with enough gain to ensure adequate gain margin When deploying the Yagi point the antenna towards the intended target ensuring the antenna elements are perpendicular to the grou...

Страница 13: ...the maximum power setting of 30dBm Example 2 What is the maximum power the N920BT can be set to comply with FCC and IC given the following equipment given a Yagi Ant Gain 12dBd and cable and connector...

Страница 14: ...dBd 900MHz Yagi Directional Antenna Bluewave RPTNC Pigtail Patch Antennas MHS031440 8dBi 900 MHz Patch Antenna RPTNC Pigtail MHS031430 12 5dBi 900 MHz Patch Antenna RPTNC Pigtail Omni Directional MHS0...

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