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MHX2421 Operating Manual: 

Glossary

 

A.  Approved Antennas 

 
 

Group Part 

Number 

Description 

Rubber Ducky 

  

  

 

MHS031100 

2dBi, 2.4GHz Rubber Ducky Antenna RPTNC Swivel 

 

MHS031110 

2dBi, 2.4GHz Rubber Ducky Antenna Reverse SMA Swivel 

 

MHS031120 

2dBi, 2.4GHz Rubber Ducky Antenna Reverse SMA Straight 

 

 

 

Transit Antennas 

  

  

 

MHS031270 

3dBi, 2.4GHz Transit Antenna Magnetic Mount with Ground Plane  

 

MHS031290 

3dBi, 2.4GHz Transit Antenna Permanent Mount with Ground Plane 

 

MHS034300 

3 dBi, 2.4GHz Compact Omni Antenna w/ Magnetic Base 

 

 

Mounts for Transit Antennas have a RPTNC Pigtail 

 

 

 

Patch Antennas

 

 

 

 

MHS034200 

8 dBi, 2.4GHz Mini Flat Patch Directional Antenna RPTNC Pigtail 

 

MHS034210 

14 dBi, 2.4GHz Flat Patch Directional Antenna RPTNC Pigtail 

 

 

 

Yagi Antennas 

  

  

 

MHS034100 

9 dBi, 2.4GHz Yagi Directional Antenna RPTNC Pigtail 

 

MHS034110 

12 dBi, 2.4GHz Yagi Directional Antenna RPTNC Pigtail 

 

MHS034120 

14 dBi, 2.4GHz Yagi Directional Antenna RPTNC Pigtail 

 

MHS034150 

14.5 dBi, 2.4GHz Yagi Directional Antenna RPTNC Pigtail 

 

 

 

Omni Directional 

  

  

 

MHS031260 

5 dBi, Omni Directional Antenna RPTNC Pigtail 

 

MHS034000 

6 dBi, 2.4GHz Omni Directional Antenna RPTNC Pigtail 

 

MHS031340 

8 dBi, Omni Directional Antenna RPTNC Pigtail 

 

MHS034020 

10.5 dBi, 2.4GHz Omni Directional Antenna RPTNC Pigtail 

 

MHS034030 

12 dBi, 2.4GHz Omni Directional Antenna RPTNC Pigtail 

 

MHS034040 

15 dBi, 2.4GHz Omni Directional Antenna 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. 
 
Industry Canada: This device has been designed to operate with the antennas listed below, and having a maximum gain 
of 14.2 dBi. Antennas not included in this list or having a gain greater than 14.2 dBi are strictly prohibited for use with 
this device. The required antenna impedance is 50 ohms.  To reduce potential radio interference to other users, the 
antenna type and its gain should be so chosen that the equivalent isotropically radiated power (EIRP) is not more than 
that required for successful communication.  

 

 

Summary of Contents for MHX2421

Page 1: ...MHX2421 2400 MHz Spread Spectrum OEM Transceiver Revision 0 30 March 5 2007 17 2135 32nd Ave N E Calgary Alberta T3K 4Z4 Phone 403 248 0028 Fax 403 248 2762 www microhardcorp com Model MHX2421 Microh...

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

Page 3: ...ntennas 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 dB...

Page 4: ...ights ii MHX2421 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 C...

Page 5: ...pectrum1 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 allowing the MHX2421 to interfa...

Page 6: ...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 between...

Page 7: ...MHX2421 Operating Manual Chapter2 General 3...

Page 8: ...between 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 use...

Page 9: ...ween 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 c...

Page 10: ...procedure for installing cabling and antennas for use with the MHX2421 module 3 2 1 Internal Cabling The most common method for installing the module is to run a cable from the module s MCX connector...

Page 11: ...stors 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 syst...

Page 12: ...uipment 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 adequat...

Page 13: ...m to the maximum power setting of 30dBm Example 2 What is the maximum power the MHX2421 can be set to comply with FCC and IC given the following equipment given a Yagi Ant Gain 12dBd and cable and con...

Page 14: ...ni Directional Antenna RPTNC Pigtail MHS034020 10 5 dBi 2 4GHz Omni Directional Antenna RPTNC Pigtail MHS034030 12 dBi 2 4GHz Omni Directional Antenna RPTNC Pigtail MHS034040 15 dBi 2 4GHz Omni Direct...

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