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Related Manuals for Microhard Systems MHX920A
Summary of Contents for Microhard Systems MHX920A
- Page 1 Operating Manual MHX920 900 MHz Spread Spectrum OEM Transceiver Revision 0.10 January 9, 2006 Model: MHX920A Microhard Systems Inc. #17, 2135 – 32 Ave N.E. Calgary, Alberta T3K 4Z4 Phone: (403) 248-0028 Fax: (403) 248-2762 www.microhardcorp.com...
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Page 2: Warranty
Warranty Microhard Systems Inc. warrants that each product will be free of defects in material and workmanship for a period of one (1) year for its products. The warranty commences on the date the product is shipped by Microhard Systems Inc. Microhard Systems Inc.’s sole liability and responsibility under this warranty is to repair or replace any product which is returned to it by the Buyer... -
Page 3: Mhx920 Regulatory Requirements
WARNING: Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s authority to operate the equipment. This device has been tested with MCX and Reverse Polarity SMA connectors with the antennas listed in Appendix A When integrated in OEM products, fixed antennas require installation preventing end-users from replacing them with non-approved antennas. -
Page 4: Table Of Contents
Contents Warranty ..................................ii Warranty Diclaims................................ ii Indemnification................................ii Proprietary Rights................................. ii MHX920 Regulatory Requirements ..........................iii CONTENTS ................................IV GENERAL ................................1 ................................ 1 RODUCT VERVIEW ..............................2 UTPUT OWER EVEL INSTALLATION..............................4 ..................................4 VERVIEW ............................4 STIMATING THE ARGIN .............................. -
Page 5: General
2. General 2.0 Product Overview The MHX920 is a high-performance embedded wireless data transceiver. Operating in the 902 - 928 MHz ISM band, this frequency-hopping spread- spectrum module is capable of providing reliable wireless data transfer between almost any type of equipment which uses an asynchronous serial interface. -
Page 6: Output Power Level
TDMA (time division multiple access) support, allowing multi-slave access in point-to-point mode. roaming ability, allowing repeaters and slaves to re- synchronize with a new master if the synchronization pulse from the original master is lost. While the typical application for the MHX920 is to provide a short- to mid- range wireless communications link between DTEs, it can be adapted to almost any situation where an asynchronous serial interface is used and data intercommunication is required. - Page 7 MHX-920 Operating Manual: Chapter2 General...
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Page 8: Installation
3. Installation 3.0 Overview Qualified and experienced personnel must carry out the installation, removal or maintenance of all antenna components. The MHX920 complies with FCC part 15 at the modular level for operation in the license-free 902-928 MHz ISM band. This chapter provides guidelines for installing and deploying equipment which incorporates the MHX920 module. - Page 9 Figure 1 Gain Calculation The power level has been set to 30dBm (1W) on the transmitter, and the receiver sensitivity for the MHX920 is -108dBm. System gain would be calculated to be: 30 - 2 + 6 + 3 - 2 + 108 = 143 dB. Base Height (m) Mobile Height...
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Page 10: Antennas And Cabling
The most common method for installing the module is to run a cable from components. the module’s MCX connector to a reverse TNC bulkhead connector on the chassis of the equipment as shown in Figure 3. This cable can be purchased from Microhard Systems. Reverse TNC Connector RG316 Cable with MCX male... -
Page 11: Installing External Cables, Antennas And Lightning Arrestors
Paging towers and cellular base stations in close proximity to the MHX920 RF energy. Always ensure that antenna can desensitize the receiver. Microhard Systems’ external cavity the MHX920 equipment is filter eliminates this problem. The filter has two N-female ports and should powered down during be connected in line at the interface to the RF equipment. - Page 12 Appendix A. please contact Microhard Systems Inc. The MHX920 CANNOT be used with any antenna that does not appear in Appendix A. Microhard Systems Inc. can provide you with approved antennas to ensure WARNING: FCC and Industry Canada compliance. Be careful with dBi vs dBd gains FCC Regulations allow up to 36dBm effective radiated power (ERP).
- Page 13 Examples: FCC and Industry Canada Regulations allow up to 36dBm effective radiated power (ERP). Therefore, the sum of the transmitted power (in dBm), the cabling loss and the antenna gain cannot exceed 36dBm with respect to the isotropic radiator. Example 1) What is the maximum power the MHX920 can be set to comply with FCC and IC given the following equipment given a Rubber Ducky Ant Gain 2dBi and no cable or connectors in the system?
- Page 14 6dBd, 900 MHz Omni Directional Antenna Bluewave, RPTNC Pigtail WARNING: Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s authority to operate the equipment. This device has been tested with MCX and Reverse Polarity SMA connectors with the antennas listed in Appendix A When integrated in OEM products, fixed antennas require installation preventing end-users from replacing them with non-approved antennas.
- Page 15 MHX-920 Operating Manual:Glossary...
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