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pMDDL900 Regulatory Requirements

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PLEASE READ THIS SECTION CAREFULLY 

 

 WARNING

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To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance of  45 cm or more should be maintained 
between the antenna of this device and persons during device operation. To ensure compliance, operations at closer than this distance is 
not recommended.  The antenna used for this transmitter must not be co-located in conjunction with any other antenna or transmitter. 

 

 WARNING

:   

Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept 
any interference received including interference that may cause undesired operation.

 

 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 UFL to 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).

 

 WARNING

MAXIMUM EIRP 
FCC Regulations allow up to 36 dBm equivalent isotropically radiated power (EIRP).  Therefore, the sum of the transmitted power 
(in dBm), the cabling loss and the antenna gain cannot exceed 36 dBm.   

 WARNING

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC 
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This 
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may 
cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular 
installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the 
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: 

 

—Reorient or relocate the receiving antenna. 

 

—Increase the separation between the equipment and receiver. 

 

—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 

 

—Consult the dealer or an experienced radio/TV technician for help.

 

 WARNING

EQUIPMENT LABELING 
The FCC and IC numbers depend on the model of the radio module. Do NOT use the Marketing Name of the product but the Model 
to distinguish the Certifications Numbers.  This device has been modularly approved.  The manufacturer, product name, and FCC 
and Industry Canada identifiers of this product must appear on the outside label of the end-user equipment.

 

 WARNING

:   

This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development 
Canada’s license-exempt RSS(s). Operation is subject to the following two conditions: 

 

1. This device may not cause interference. 

 

2. This device must accept any interference, including interference that may cause undesired operation of the device. 

 
SAMPLE LABEL REQUIREMENT for Model: pMDDL900: 

 
 
 

 
 
 
 
 
 
 

 

Contains:    

FCC ID: NS9PMDDL900     IC: 3143A-PMDDL900 

This device complies with Part 15 of the FCC Rules.  
Operation is subject to the following two conditions: (1) this 
device may not cause harmful interference, and (2) this device 
must accept any interference received including interference 
that may cause undesired operation. 

 

Summary of Contents for pMDDL900

Page 1: ...Operating Manual pMDDL900 2X2 MIMO 900MHz OEM DDL Module 1W Revision 0 30 May 28 2019 Microhard www microhardcorp com...

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: ...This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However th...

Page 4: ...45 cm this configuration can be co located with other antennas provided the sum of the MPE ratios for all the other simultaneous transmitting antennas incorporated in a host device is 1 0 0 567 0 433...

Page 5: ...iii Co Location Instructions iiv 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 ANTENNAS AND CABLING 5 3 2 1 Internal...

Page 6: ......

Page 7: ...a public 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 f...

Page 8: ...t 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 fro...

Page 9: ...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 l...

Page 10: ...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 compl...

Page 11: ...procedure for installing cabling and antennas for use with the pMDDL900 module 3 2 1 Internal Cabling The most common method for installing the module is to run a cable from the module s UFL connecto...

Page 12: ...rs 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 system...

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 pMDDL900 can be set to comply with FCC and IC given the following equipment given a Yagi Ant Gain 12dBd and cable and connect...

Page 15: ...Antenna RPTNC Pigtail Patch Antennas MHS031440 8dBi 900 MHz Patch Antenna RPTNC Pigtail Omni Directional MHS031251 3dBd 900MHz Omni Directional Antenna Antenex RPTNC Pigtail MHS031461 3dBd 900 MHz Om...

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