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Related Manuals for Microhard Systems MHX-910A
Summary of Contents for Microhard Systems MHX-910A
- Page 1 Operating Manual MHX-910A 900 MHz Spread Spectrum OEM Module Revision 0.10 November 1, 2004 Microhard Systems Inc. #17, 2135 - 32 Ave. N.E. Calgary, Alberta T2E 6Z3 Phone: (403) 248-0028 Fax: (403) 248-2762 www.microhardcorp.com MHX 910A Operating Manual...
- Page 2 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 WARNING This device can only be used with Antennas listed in Appendix A. Please Contact Microhard Systems Inc. if you need more information or would like to order an antenna.
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Page 5: Table Of Contents
Contents CONTENTS ................................III HISTORY..................................V TABLES AND FIGURES ............................VII ....................................... ABLES ...................................... IGURES INTRODUCTION ...............................1 ................................ 1 RODUCT VERVIEW ..................................2 EATURES CONFIGURATION ............................4 ..................................4 VERVIEW ..............................4 UTPUT OWER EVEL INSTALLATION..............................7 ..................................7 VERVIEW ............................7 STIMATING THE ARGIN ................................ -
Page 7: History
History Revision Date Action FW Rev. Note 0.10 2004-11-01 Created For FCC Approval MHX 910A Operating Manual: History... - Page 9 Tables and Figures Tables Table 1 Path Loss ................................8 Table 2 Cable Loss ..............................10 Figures Figure 1 Gain Calculation.............................7 Figure 2 System Deploying ............................8 Figure 3 Suggested Internal Cabling ..........................9 MHX 910A Operating Manual: Tables and Figures...
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Page 11: Introduction
The MHX-910A is a very high-performance wireless module. When used properly very long distance communication at very high speeds can be accomplished. The MHX-910A operates in the 902 - 928 MHz ISM band, using frequency-hopping spread-spectrum module is capable of providing reliable wireless data transfer between almost any equipment which uses an RS232, RS422, or RS485 interfaces. -
Page 12: Features
AT style commands, very similar to those used by traditional telephone line modules. While the typical application for the MHX-910A 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 13 MHX 910A Operating Manual: Chapter 1 Introduction...
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Page 14: Configuration
MHX-910A. 2.1 Output Power Level The Output Power Level determines at what power the MHX-910A transmits. The MHX-910A’s sensitive receiver can operate with very low power levels, so it is recommended that the lowest power necessary is used;... - Page 15 WARNING IMPORTANT: In order to comply with the FCC Regulations allow up to 36 dBi effective radiated power (ERP). FCC/IC adopted Therefore, the sum of the transmitted power (in dBm), the cabling loss exposure requirements, this and the antenna gain cannot exceed 36 dBi. transmitter system will be installed 1 mW = 0 dBm...
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Page 17: Installation
The MHX-910A 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 MHX-910A module. -
Page 18: Table 1 Path Loss
The power level has been set to 30dBm (1W) on the transmitter, and the receiver sensitivity for the MHX-910A is -105dBm. System gain can be calculated: 30 - 2 + 6 + 3 - 2 + 105 = 140 dB. -
Page 19: Internal Cabling
3.2 Internal Cabling This section describes the recommended procedure for installing cabling and antennas for use with the MHX-910A module. The most common method for installing the module is to run a cable from the module’s MCX connector to a reverse TNC bulkhead connector on the chassis of the equipment as shown in Figure 3. -
Page 20: Installing External Cables, Antennas And Lightning Arrestors
External Filter transmitter Although the MHX-910A is capable of filtering out RF noise in most environments, there are circumstances that require external filtering. Paging towers, and cellular base stations in close proximity to the MHX-910A WARNING antenna can desensitize the receiver. Microhard Systems’ external cavity Direct human contact with filter eliminates this problem. - Page 21 Factors to take into consideration when choosing a cable are: • price; • bend radius limitations (the lower performance cables generally can bend more sharply) • performance requirements; and, • distance between the equipment and the antenna. When installing the cable, always begin fastening at the top near the antenna connector/surge arrestor.
- Page 22 Antenna Before choosing an antenna, you should have some knowledge of the path loss and the topology of the equipment. If the equipment is in a fixed location and is to communicate with only one other unit also in a fixed location, then a Yagi antenna is suitable.
- Page 23 Example 1) What is the maximum power the MHX-910A can be set to comply with FCC and IC given the following equipment given a Rubber Ducky Antenna Gain 2dBi and no cable or connectors in the system? Max ERP 36dBm Max TX power = ERP –...
- Page 24 MHX 920 Operating Manual: Chapter 3 Installation...
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Page 25: Approved Antennas
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 26 MHX 910A Operating Manual: Appendix A Approved Antennas...
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