background image

pMDDL2450 Operating Manual

 

5

 

 

 

 

 

 

 

Once the equipment is deployed, you can verify the signal strength by 
entering into Command Mode and reading Register S123.  This register 
provides the average signal strength in dBm.  The minimum strength for 
communication is roughly -108dBm.  For consistent reliable 
communication, you should try to deploy the equipment such that signal 
strength exceeds -95dBm. 

 

3.2

 

Antennas and Cabling 

This section describes the recommended procedure for installing cabling and 
antennas for use with the pMDDL2450 module. 

3.2.1

 

Internal Cabling 

The most common method for installing the module is to run a cable from the 
module’s UFL 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. 

 

 

Figure 3 Suggested Internal Cabling

   

Cable  losses  are  negligible  for  the  short  piece  used  within  the  chassis.  
Additional losses up to 0.5 dB may be present in the MCX and Reverse TNC 
connections. 

RG316 Cable 

with UFL

 

connector

and Reverse TNC

bulkhead

connector 

Reverse TNC Connector

UFL connector

 

PDDL2450

 

Summary of Contents for pMDDL2450

Page 1: ...Operating Manual pMDDL2450 2X2 MIMO 2 4 GHz OEM DDL Module 1W Revision 0 26 March 10 2018 Microhard www microhardcorp com...

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

Page 3: ...ested to comply with FCC Section 15 203 unique antenna connectors and Section 15 247 emissions WARNING MAXIMUM EIRP FCC Regulations allow up to 36 dBm equivalent isotropically radiated power EIRP Ther...

Page 4: ...re test s pour se conformer la Section 15 203 connecteurs d antenne uniques et la Section 15 247 missions WARNING MAXIMUM PIRE R glement FCC permettent jusqu 36 dBm puissance isotrope rayonn e quivale...

Page 5: ...with GSM UMTS LTE Data Module FCC ID RI7LE910NAV2 IC 5131A LE910NAV2 Co localisation avec Cellular Modem Le maximum calcul rapport EMT pour l EST avec antenne dip le 2 5 dBi est de 0 379 cette configu...

Page 6: ...pMDDL2450 Exigences R glementaires iv Co Location Instructions v 2 GENERAL 1 2 0 PRODUCT OVERVIEW 1 2 1 OUTPUT POWER LEVEL 2 3 INSTALLATION 3 3 0 OVERVIEW 3 3 1 ESTIMATING THE GAIN MARGIN 3 3 2 ANTEN...

Page 7: ...blic 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 handshaking and hardware flow...

Page 8: ...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 units starting fr...

Page 9: ...on knowledge of the equipment being deployed The following four factors make up a system gain calculation 1 Transmitter power user selectable 2 Transmitter gain transmitting antenna gain minus cabling...

Page 10: ...n 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 comp...

Page 11: ...procedure for installing cabling and antennas for use with the pMDDL2450 module 3 2 1 Internal Cabling The most common method for installing the module is to run a cable from the module s UFL connect...

Page 12: ...tors 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 syste...

Page 13: ...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...

Page 14: ...the maximum power setting of 30dBm Example 2 What is the maximum power the pMDDL2450 can be set to comply with FCC and IC given the following equipment given a Yagi Ant Gain 12dBd and cable and connec...

Page 15: ...0 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 c...

Reviews: