Microhard Systems 07P22 Users manual

Operating Manual

MHX2420

2400 MHz Spread Spectrum OEM
Transceiver

Revision 0.30, March 5, 2007

Microhard Systems Inc.

#17, 2135 – 32nd Ave N.E.
Calgary, Alberta T3K 4Z4
Phone: [phone]
Fax: [phone]

www.microhardcorp.com

Model: MHX2420

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
and which Microhard Systems Inc. determines does not conform to the warranty. Product returned to Microhard Systems Inc. for
warranty service will be shipped to Microhard Systems Inc. at Buyer’s expense and will be returned to Buyer at Microhard
Systems Inc.’s expense. In no event shall Microhard Systems Inc. be responsible under this warranty for any defect which is
caused by negligence, misuse or mistreatment of a product or for any unit which has been altered or modified in any way. The
warranty of replacement shall terminate with the warranty of the product.

Warranty Disclaims

Microhard Systems Inc. makes no warranties of any nature of kind, expressed or implied, with respect to the hardware, software,
and/or products and hereby disclaims any and all such warranties, including but not limited to warranty of non-infringement,
implied warranties of merchantability for a particular purpose, any interruption or loss of the hardware, software, and/or product,
any delay in providing the hardware, software, and/or product or correcting any defect in the hardware, software, and/or product,
or any other warranty. The Purchaser represents and warrants that Microhard Systems Inc. has not made any such warranties to
the Purchaser or its agents MICROHARD SYSTEMS INC. EXPRESS WARRANTY TO BUYER CONSTITUTES
MICROHARD SYSTEMS INC. SOLE LIABILITY AND THE BUYER’S SOLE REMEDIES. EXCEPT AS THUS
PROVIDED, MICROHARD SYSTEMS INC. DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PROMISE.

MICROHARD SYSTEMS INC. PRODUCTS ARE NOT DESIGNED OR INTENDED TO BE USED IN
ANY LIFE SUPPORT RELATED DEVICE OR SYSTEM RELATED FUNCTIONS NOR AS PART OF
ANY OTHER CRITICAL SYSTEM AND ARE GRANTED NO FUNCTIONAL WARRANTY.

Indemnification

The Purchaser shall indemnify Microhard Systems Inc. and its respective directors, officers, employees, successors
and assigns including any subsidiaries, related corporations, or affiliates, shall be released and discharged from any
and all manner of action, causes of action, liability, losses, damages, suits, dues, sums of money, expenses
(including legal fees), general damages, special damages, including without limitation, claims for personal injuries,
death or property damage related to the products sold hereunder, costs and demands of every and any kind and
nature whatsoever at law.

IN NO EVENT WILL MICROHARD SYSTEMS INC. BE LIABLE FOR ANY INDIRECT, SPECIAL,
CONSEQUENTIAL, INCIDENTAL, BUSINESS INTERRUPTION, CATASTROPHIC, PUNITIVE OR OTHER
DAMAGES WHICH MAY BE CLAIMED TO ARISE IN CONNECTION WITH THE HARDWARE,
REGARDLESS OF THE LEGAL THEORY BEHIND SUCH CLAIMS, WHETHER IN TORT, CONTRACT OR
UNDER ANY APPLICABLE STATUTORY OR REGULATORY LAWS, RULES, REGULATIONS,
EXECUTIVE OR ADMINISTRATIVE ORDERS OR DECLARATIONS OR OTHERWISE, EVEN IF
MICROHARD SYSTEMS INC. HAS BEEN ADVISED OR OTHERWISE HAS KNOWLEDGE OF THE
POSSIBILITY OF SUCH DAMAGES AND TAKES NO ACTION TO PREVENT OR MINIMIZE SUCH
DAMAGES. IN THE EVENT THAT REGARDLESS OF THE WARRANTY DISCLAIMERS AND HOLD
HARMLESS PROVISIONS INCLUDED ABOVE MICROHARD SYSTEMS INC. IS SOMEHOW HELD
LIABLE OR RESPONSIBLE FOR ANY DAMAGE OR INJURY, MICROHARD SYSTEMS INC.'S LIABILITY
FOR ANYDAMAGES SHALL NOT EXCEED THE PROFIT REALIZED BY MICROHARD SYSTEMS INC.
ON THE SALE OR PROVISION OF THE HARDWARE TO THE CUSTOMER.

Proprietary Rights

The Buyer hereby acknowledges that Microhard Systems Inc. has a proprietary interest and intellectual property rights in the
Hardware, Software and/or Products. The Purchaser shall not (i) remove any copyright, trade secret, trademark or other evidence
of Microhard Systems Inc.’s ownership or proprietary interest or confidentiality other proprietary notices contained on, or in, the
Hardware, Software or Products, (ii) reproduce or modify any Hardware, Software or Products or make any copies thereof, (iii)
reverse assemble, reverse engineer or decompile any Software or copy thereof in whole or in part, (iv) sell, transfer or otherwise
make available to others the Hardware, Software, or Products or documentation thereof or any copy thereof, except in accordance
with this Agreement.

ii MHX2420 Operating Manual

MHX2420 Regulatory Requirements

PLEASE READ THIS SECTION CAREFULLY

WARNING:

To satisfy FCC RF exposure requirements for both base and mobile a separation distance of 23 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:

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).

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:

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.

SAMPLE LABEL REQUIREMENT for Model: MHX2420:

Contains:

FCCID: NS907P22 IC : 3143A-07P22

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.

MHX2420 Operating Manual: Contents iii

Contents

Warranty....................................................................................................................................................................... ii

Warranty Diclaims........................................................................................................................................................ ii

Indemnification............................................................................................................................................................. ii

Proprietary Rights......................................................................................................................................................... ii

MHX2420 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 CABLING ................................................................................................................................................. 6

3.2.1 ........................................................................................................................Internal Cabling

...............................................................................................................................................................................6

3.2.2 ............................................................Installing External Cables, Antennas and Lightning Arrestors

...............................................................................................................................................................................7

iv MHX2420 Operating Manual

2. General

2.0 Product Overview

The MHX2420 is a high-performance embedded wireless data transceiver.
Operating in the 2400 - 2483.5 MHz ISM band, this a spread-spectrum
module is capable of providing reliable wireless data transfer between
almost any type of equipment. The small-size and superior RF performance
of this module make it ideal for many applications.

While a pair of MHX2420 modules can link two terminal devices (“point­to-point” operation); multiple modules can be used together to create a
network of various topologies, including “point-to-multipoint” and
“repeater” operation. Multiple independent networks can operate
concurrently, so it is possible for unrelated communications to take place in
the same or a nearby area without sacrificing privacy or reliability.

1.1 Features

Key features of the MHX2420 include:

 transmission within a public, license-exempt band of the radio

spectrum
(such as those incurred by cellular airtime).

 a serial I/O data port with handshaking and hardware flow

control, allowing the MHX2420 to interface directly to any
equipment with an asynchronous serial interface.

 ease of installation and use – the MHX2420 module uses a

subset of standard AT style commands, very similar to those
used by traditional telephone line modems.

 all units in a system are physically identical, and can be

configured as a master, repeater or slave using the AT
command set. No hardware modifications are required

 128 sets of user-selectable pseudo-random hopping patterns,

intelligently designed to offer the possibility of separately
operating multiple networks while providing security,
reliability and high tolerance to interference.

 encryption key with 65536 user-selectable values to maximize

security and privacy of communications.

 32-bit of CRC error detection and auto re-transmit to provide

accuracy and reliability of data.

1

– this means that it can be used without access fees

1

902-928 MHz, which is license-free within North America; may need to be factory-

configured differently for some countries.

MHX2420 Operating Manual: Chapter2 General 1