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10

 

MHX-920 Operating Manual: 

Glossary

 

A.  Approved Antennas 

 

Group Part 

Number 

Description 

Quarter Wave 

  

  

 

MHS031010 

<1.5dBi, 900MHz 1/4 Wave Antenna Reverse SMA Right Angle 

 

MHS031020 

<1.5dBi, 900MHz 1/4 Wave Antenna Reverse SMA Straight 

 

MHS031030 

<1.5dBi, 900MHz 1/4 Wave Antenna Reverse SMA Right Angle MHS 

 

MHS031040 

<1.5dBi, 900MHz 1/4 Wave Antenna Reverse SMA Straight MHS 

 

MHS031050 

<1.5dBi, 900MHz 1/4 Wave Antenna MCX Right Angle MHS 

 

MHS031060 

<1.5dBi, 900MHz 1/4 Wave Antenna Reverse SMA Straight 

 

 

 

Rubber Ducky 

  

  

 

MHS031000 

2dBi, 900MHz Rubber Ducky Antenna RPTNC Swivel 

 

MHS031070 

2dBi, 900MHz Rubber Ducky Antenna Reverse SMA Swivel 

 

MHS031080 

2dBi, 900MHz Rubber Ducky Antenna Reverse SMA Straight 

 

 

 

Transit Antennas 

  

  

 

MHS031210  

3dBd, 900 MHz Transit Antenna with Ground Plane  

 

MHS031220 

3dBd, 900MHz Transit Antenna No Ground Plane  

 

MHS031230 

3dBd, 900MHz Transit Antenna Permanent Mount GP  

 

MHS031240  

3dBd, 900MHz Transit Antenna Permanent Mount NGP  

 

 

Mounts for Transit Antennas have a RPTNC Pigtail 

Yagi Antennas 

  

  

 

MHS031311 

6dBd, 900MHz Yagi Directional Antenna Antenex, RPTNC Pigtail 

 

MHS031431 

6.5dBd, 900MHz Yagi Directional Antenna Bluewave, RPTNC Pigtail 

 

MHS031501 

9dBd, 900MHz Yagi Directional Antenna Antenex, RPTNC Pigtail 

 

MHS031441 

10dBd, 900 MHz Yagi Directional Antenna Bluewave, RPTNC Pigtail 

 

MHS031451 

11dBd, 900 MHz Yagi Directional Antenna Bluewave, RPTNC Pigtail 

 

MHS031401 

12dBd, 900MHz Yagi Directional Antenna Antenex, RPTNC Pigtail 

 

MHS031411 

12dBd, 900MHz Yagi Directional Antenna Bluewave, RPTNC Pigtail 

 

 

 

Omni Directional 

  

  

 MHS031251 3dBd, 

900MHz 

Omni 

Directional Antenna Antenex, RPTNC Pigtail 

 

MHS031461 

3dBd, 900 MHz Omni Directional Antenna Bluewave, RPTNC Pigtail 

 MHS031321 6dBd, 

900MHz 

Omni 

Directional Antenna Antenex, RPTNC Pigtail 

 

MHS031471 

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. Antennas not 
listed in the tables must be tested to comply with FCC Section 15.203 (unique antenna connectors) and 
Section 15.247 (emissions).  Please Contact Microhard Systems Inc. if you need more information. 

 

Summary of Contents for MHX-920

Page 1: ...MHX920 900 MHz Spread Spectrum OEM Transceiver Revision 0 10 January 9 2006 17 2135 32nd Ave N E Calgary Alberta T3K 4Z4 Phone 403 248 0028 Fax 403 248 2762 www microhardcorp com Model MHX920A Microh...

Page 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...

Page 3: ...d antennas Antennas not listed in the tables must be tested to comply with FCC Section 15 203 unique antenna connectors and Section 15 247 emissions WARNING MAXIMUM EIRP FCC Regulations allow up to 36...

Page 4: ...ights ii MHX920 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...

Page 5: ...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 handshaking and hardware flow control allo...

Page 6: ...ry 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 test the communications performance be...

Page 7: ...MHX 920 Operating Manual Chapter2 General 3...

Page 8: ...ween a transmitter receiver pair The number can be calculated based on knowledge of the equipment being deployed The following four factors make up a system gain calculation 1 Transmitter power user s...

Page 9: ...een system 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 co...

Page 10: ...2 Antennas and Cabling This section describes the recommended procedure for installing cabling and antennas for use with the MHX920 module 3 2 1 Internal Cabling The most common method for installing...

Page 11: ...and any person when the device is in operation Surge Arrestors The most effective protection against lightning is to install two lightning surge arrestors one at the antenna the other one at the inte...

Page 12: ...t 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 Choose a Yagi with enough gain to ensure adequate gain...

Page 13: ...he maximum power setting of 30dBm Example 2 What is the maximum power the MHX920 can be set to comply with FCC and IC given the following equipment given a Yagi Ant Gain 12dBd and cable and connector...

Page 14: ...Directional Antenna Bluewave RPTNC Pigtail MHS031501 9dBd 900MHz Yagi Directional Antenna Antenex RPTNC Pigtail MHS031441 10dBd 900 MHz Yagi Directional Antenna Bluewave RPTNC Pigtail MHS031451 11dBd...

Page 15: ...MHX 920 Operating Manual Glossary 11...

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