Microhard Systems NA30 5.8GHz 802.11a 1W OEM Module User Manual n802 11a 30manualREV0 00 FCC

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Operating Manual
n802.11a-30
5.8GHz 802.11a 1W OEM Module
Revision 0.50, June 5, 2013
Model: n802.11a-30
Microhard Systems Inc.
Phone: (403) 248-0028
Fax: (403) 248-2762
www.microhardcorp.com
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
Operating Manual
n802.11bg-30 Regulatory Requirements
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.
In Point to Point Systems, the minimum Safe Distance is 88cm with 23dBi antenna and operated at maximum
power.
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 MMCX 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:
To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring
compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as
an unintentional radiator under the Declaration of Conformity procedure without a transmitter certified module
and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and
operational the host continues to be compliant with the Part 15B unintentional radiator requirements. Since this
may depend on the details of how the module is integrated with the host, the grantee (the party responsible for the
module grant) shall provide guidance to the host manufacturer for compliance with the Part 15B requirements.
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, when
operating in non Point to Point Systems. In Point to Point Systems, the power may exceed 36dBm EIRP.
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: n802.11a-30:
Contains:
FCCID: NS9NA30
IC : 3143A-NA30
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.
Operating Manual: Contents
iii
Contents
Warranty ....................................................................................................................................................................... ii
Warranty Diclaims........................................................................................................................................................ ii
Indemnification............................................................................................................................................................. ii
Proprietary Rights......................................................................................................................................................... ii
Regulatory Requirements ............................................................................................................................................ iii
CONTENTS .............................................................................................................................................................. IV
2.
GENERAL ...........................................................................................................................................................1
2.0
2.1
3.
PRODUCT OVERVIEW ........................................................................................................................................................ 1
OUTPUT POWER LEVEL ..................................................................................................................................................... 2
INSTALLATION.................................................................................................................................................4
3.0
3.1
3.2
OVERVIEW ....................................................................................................................................................................... 4
ESTIMATING THE GAIN MARGIN ....................................................................................................................................... 4
ANTENNAS AND CABLING ................................................................................................................................................. 6
3.2.1 ........................................................................................................................Internal Cabling
...............................................................................................................................................................................6
3.2.2 ............................................................Installing External Cables, Antennas and Lightning Arrestors
...............................................................................................................................................................................7
iv
Operating Manual
2. General
2.0 Product Overview
The n802.11a-30 is a high-performance embedded wireless data transceiver.
Operating in the 5725 - 5875 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 N802.11A-30 modules can link two terminal devices
(“point-to-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 N802.11A-30 include:
 transmission within 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 flow
control, allowing the N802.11A-30 to interface directly to any
equipment with an asynchronous serial interface.
 ease of installation and use – the N802.11A-30 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.
902-928 MHz, which is license-free within North America; may need to be factoryconfigured differently for some countries.
N2420B Operating Manual: Chapter2 General
 TDMA (time division multiple access) support, allowing
multi-slave access in point-to-point mode.
 roaming ability, allowing repeaters and slaves to resynchronize with a new master if the synchronization pulse
from the original master is lost.
While the typical application for the N802.11A-30 is to provide a short- to
mid-range wireless communications link between DTEs, it can be adapted
to almost any situation where an asynchronous serial interface is used and
data intercommunication is required.
2.1 Output Power Level
The Output Power Level determines at what power the module transmits.
The module’s sensitive receiver can operate with very 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 between units
starting from a low power level and working upward until the RSSI is
sufficiently high and a reliable link is established. The conditions will vary
widely between applications, the output power settings can be calculated
based on following information.

Transmitter antenna gain

Cable loss

Equivalent Isotropically Radiated Power (EIRP) requirement by FCC
Regulations
Power Setting = 36 – Antenna Gain – Cable Loss
The power setting must be no more than the above calculation value. Any
higher is a violation of FCC rules. See IMPORTANT warning below.
Table 1 Output Power
Power Setting
(dBm)
Approx. Output Power
(mW)
22
23
24
25
26
27
28
29
30
160
200
250
320
400
500
630
800
1000
N2420B Operating Manual: Chapter 2 General
N2420B Operating Manual: Chapter2 General
3. Installation
3.0 Overview
Qualified and experienced personnel must carry out the
installation, removal or maintenance of all antenna components.
The N802.11A-30 complies with FCC part 15 at the modular level for
operation in the license-free 5725 - 5875 MHz ISM band. This chapter
provides guidelines for installing and deploying equipment which
incorporates the N802.11A-30 module.
When used specifically in Point to Point systems excludes the
use of point-to-multipoint systems, omnidirectional applications,
and multiple co-located intentional radiators transmitting the same
information the power may exceed 36dBm EIRP as per FCC and
IC grant. The operator of the spread spectrum intentional radiator
or, if the equipment is professionally installed, the installer is
responsible for ensuring that the system is used exclusively for
fixed, point-to-point operations.
3.1 Estimating the Gain Margin
Successful communication between N802.11A-30 modules is dependent on
three main factors 1) System Gain, 2)Path Los, 3Interference.
System gain is a calculation in dB describing the performance to be
expected 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 (user selectable)
2.
Transmitter gain (transmitting antenna gain minus cabling loss between
the transmitting antenna and the N802.11A-30 module)
3.
Receiver gain (Receiving antenna gain minus cabling loss between the
receiving antenna and the module)
4.
Receiver sensitivity (Specified as -108dBm on the N802.11A-30
module)
In the following illustration, the transmitting antenna has a gain of 6 dB,
and the receiving antenna has a gain of 3 dB. The cable loss between the
module and the antenna is 2 dB on both the transmitting and receiving side.
Cable Loss = 2 dB
Cable Loss = 2 dB
Antenna Gain = 6 dB
Antenna Gain = 3 dB
Transmitter
Receiver
30 dBm
Output Power
Sensitivity =
-105 dBm
N2420B Operating Manual: Chapter 3 Installation
Figure 1 Gain Calculation
The power level has been set to 30dBm (1W) on the transmitter, and the
receiver sensitivity for the N802.11A-30 is -108dBm.
System gain would be calculated to be:
30 - 2 + 6 + 3 - 2 + 108 = 143 dB.
Base Height (m)
Mobile
Height
(m)
Distance (km)
Figure 2 System Deploying
When deploying your system, care must be taken to ensure the path loss
(reduction of signal strength from transmitter to receiver in dB) between
equipment does not exceed the system gain (140 dB in the above example).
It is recommended to design for a gain margin of at least 20 dB to ensure
reliable communication. Gain margin is the difference between 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 complicated calculation which mainly depends on the
terrain profile, and the height of the antennas off the ground.
The following table provides path loss numbers for varying antenna heights
and antenna separation: These numbers are real averages taken from rural
environments. They do not apply to urban, non-line-of-sight environments.
Table 2 Path Loss
Operating Manual:Glossary
Distance
(km)
Base Height
(m)
Mobile Height
(m)
Path Loss
(dB)
15
2.5
116.5
30
2.5
110.9
15
2.5
124.1
15
117.7
15
10
105
16
15
2.5
135.3
16
15
128.9
16
15
10
116.2
16
30
10
109.6
16
30
122.4
16
30
2.5
128.8
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 N802.11A-30 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 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.
Reverse TNC Connector
RG316 Cable
with MCX male
connector
and Reverse TNC
bulkhead
connector
n802.11a-30
MCX female connector
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.
Operating Manual: Glossary
3.2.2
Installing External Cables, Antennas and Lightning
Arrestors
WARNING:
To satisfy FCC RF exposure
requirements for mobile
transmitting devices, 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.
Never work on an antenna system when there is lightning in the area.
Direct human contact with the antenna is potentially unhealthy when the
N802.11A-30 is generating RF energy. Always ensure that the N802.11A30 equipment is powered down during installation. At all times a distance
of 23 cm must be maintained between the antenna 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 interface with the
equipment.
The surge arrestor grounding system should be fully
interconnected with the transmission tower and power grounding systems to
form a single, fully integrated ground circuit. Typically, both ports on surge
arrestors are N-female.
External Filter
WARNING:
Direct human contact with the
antenna is potentially unhealthy
when the module is generating
RF energy. Always ensure that
the module equipment is powered
down during installation.
Although the N802.11A-30 is capable of filtering out RF noise in most
environments, there are circumstances that require external filtering.
Paging towers and cellular base stations in close proximity to the
N802.11A-30 antenna can desensitize the receiver. Microhard Systems’
external cavity filter eliminates this problem. The filter has two N-female
ports and should be connected in line at the interface to the RF equipment.
Weatherproofing
WARNING:
Never work on an antenna
system when there is lightning in
the area.
Type N and RTNC connectors are not weatherproof. All connectors should
be taped with rubber splicing tape (weatherproofing tape), and then coated
with a sealant.
Cabling
The following coax cables are recommended:
Table 3 Cable Loss
Cable
Loss (dB/100ft)
LMR 195
10.7
LMR 400
3.9
LMR 600
2.5
Factors to take into consideration when choosing a cable are:
Operating Manual:Glossary

price;

bend radius limitations (the lower performance cables generally can
bend more sharply)

performance requirements; and,

distance between the equipment and the antenna.
When installing the cable, always begin fastening at the top near the
antenna connector/surge arrestor. The cable must be supported at the top
with a hose clamp or wrap lock, and at 5 ft intervals down the length of the
tower. Over-tightening the fasteners will dent the cable and reduce
performance. If properly grounded surge arrestors are not installed at both
the top and the bottom of the cable, then the cable should be grounded to
the tower at these locations using a cable grounding kit. If the tower is nonconductive, then a separate conductor, physically separate from the cable,
should be run down the tower.
WARNING:
MAXIMUM EIRP
FCC and IC Regulations allow
up to 36dBm 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 with respect to the
isotropic radiator.
WARNING:
The N802.11A-30 can only be
used with any antennas listed in
Appendix A.
WARNING:
Be careful with dBi vs dBd gains
on antenna specifications.
Antenna manufactures may not
clearly indicate the gain on the
antenna if it is dBd or dBi. Note
1dBd = 2.15dBi.
Antenna
Before choosing an antenna, you should have some knowledge of the path
loss and the topology of the equipment. 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 margin. When deploying the Yagi, point the
antenna towards the intended target, ensuring the antenna elements are
perpendicular to the ground for vertical polarization.
In applications where there are multiple units that you must communicate
with or units, which are in motion, you may select an Omni-directional
antenna with appropriate gain.
See appendix A for a list of approved antennas that can be used with
the N802.11A-30 radio modem. If you require another type of antenna
please contact Microhard Systems Inc. The N802.11A-30 CANNOT be
used with any antenna that does not appear in Appendix A.
Microhard Systems Inc. can provide you with approved antennas to ensure
FCC and Industry Canada compliance.
FCC Regulations allow up to 36dBm effective radiated power (EIRP).
Therefore, the sum of the transmitted power (in dBm), the cabling loss
and the antenna gain cannot exceed 36dBm with respect to the isotropic
radiator.
EIRP is calculated as follows:
EIRP = Tx Power(dBm) - Cable/Connector Loss(dB) + Ant Gain(dBi)
Antenna Gains must be in dBi when calculating the 36dBm EIRP limit.
1dBd = 2.15dBi
Use the guidelines in the previous section for calculating cable and
connector losses. If cabling and connector losses are 2 dB, then the
maximum allowable gain of the antenna will be 8 dB.
Operating Manual: Glossary
Examples:
FCC and Industry Canada Regulations allow up to 36dBm equivalent
isotropically radiated power (EIRP). Therefore, the sum of the
transmitted power (in dBm), the cabling loss and the antenna gain
cannot exceed 36dBm with respect to the isotropic radiator.
Example 1)
What is the maximum power the N802.11A-30 can be set to comply
with FCC and IC given the following equipment given a Rubber Ducky
Ant Gain 2dBi and no cable or connectors in the system?
Max EIRP 36dBm
Max TX power = EIRP – Ant Gain(dBi) + Cable/Connector loss (dB)
Ant Gain dBi = 2dBi
Max TX power = 36dBm – 2dBi + 0dB = 34dBm
We can set the modem to the maximum power setting of 30dBm.
Example 2)
What is the maximum power the N802.11A-30 can be set to comply
with FCC and IC given the following equipment given a Yagi Ant Gain
12dBd and cable and connector loss of 4.5 dB?
Max EIRP 36dBm
Max TX power = EIRP – Ant Gain(dBi) + Cable/Connector loss (dB)
Ant Gain dBi = Ant Gain dBd + 2.15 dB
Yagi Gain (dBi) = 12 + 2.15 = 14.15dBi
Max TX power = 36dBm – 14.15dB + 4.5dB = 26.35dBm
We must round down
Hence Max TX power = 26dBm
Example 3)
What is the maximum power the N802.11A-30 can be set to comply
with FCC and IC given the following equipment given a Omni Ant
Gain 6dBd and cable and connector loss of 2.5 dB?
Max EIRP 36dBm
Max TX power = EIRP – Ant Gain(dBi) + Cable/Connector loss (dB)
Ant Gain dBi = Ant Gain dBd + 2.15 dB
Omni Gain (dBi) = 6 + 2.15 = 8.15dBi
Max TX power = 36dBm – 8.15dB + 2.5dB = 30.35dBm
Hence Max TX power = 30dBm
Operating Manual:Glossary
A. Approved Antennas
Group
Description
Rubber Ducky
4dBi, 5.8GHz Rubber Ducky Antenna RPTNC Swivel
4dBi, 5.8GHz Rubber Ducky Antenna RSMA Swivel
Patch Antennas
23 dBi, 5.8GHz Flat Patch Directional Antenna RSMA 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 MMCX 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 23 dBi. Antennas not included in this list or having a gain greater than 23 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.
10
Operating Manual: Glossary

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