Trango Systems M900S Digital Transceiver User Manual Professional Installation Guide

Trango Systems Inc Digital Transceiver Professional Installation Guide

Contents

installation guide

Prof Install Guide for M900S Access Point and Subscriber Unit
1
M900S™
Wireless Broadband System
PROFESSIONAL INSTALLATION GUIDE
FOR
M900S-AP and M900S-SU
[draft]
Prof Install Guide for M900S Access Point and Subscriber Unit
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1. Overview
This manual covers configuration and installation of the optional external antennas for use with the M900S Access Point
M900S-AP and Subscriber Unit M900S-SU. Since this device requires manual power limit settings for use with the
higher gain antennas, it is classified by the FCC as a professional install device. To be in compliance with FCC
requirements, the radio must be installed with one of several approved antennas listed in this document.
The M900S-SU subscriber unit (SU) works in conjunction with the M900S-AP access point. Please see the M900S User
Manual for general information on overall system implementation, configuration, and management of the access point.
The M900S User Manual also covers many important aspects of subscriber unit configuration and management.
2. FCC Information
This device complies with Part 15 of FCC Rules and Regulations. 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.
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 these instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in any 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
correct the interference by one of more of the following measures:
1) Reorient the antenna;
2) Increase the separation between the affected equipment and the unit;
3) Connect the affected equipment to a power outlet on a different circuit from that which the receiver is connected to;
4) Consult the dealer and/or experienced radio/TV technician for help.
FCC ID: NCYM900S
Canada: XXXXXXXXXX
IMPORTANT NOTE:
Intentional or unintentional changes or modifications must not be made unless under the express consent of the party
responsible for compliance. Any such modifications could void the user’s authority to operate the equipment and will
void the manufacturer’s warranty. To comply with FCC RF exposure requirements, the following antenna installation
and device operating configurations must be satisfied. The antenna for this unit must be fixed and mounted on outdoor
permanent structures with a separation distance of at least two meters from all persons. Furthermore, it must not be co-
located or operating in conjunction with any other antenna or transmitter.
3. Warranty Information
Radios from Trango Broadband Wireless are warranted from one year from date of purchase. Please see
www.trangobroadband.com for complete description of warranty coverage and limitations
Prof Install Guide for M900S Access Point and Subscriber Unit
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4. General Information
4.1 Contents
Each SU or AP radio comes equipped with an intenal dual polarization antenna, a power-over-Ethernet (POE) J-Box, an
AC adapter, and mounting hardware for pole mounting. The radio also has one reverse-polarity SMA connectors on the
side for attachment to an external antenna. The MAC ID and Serial # are printed on a label on the back of the radio.
4.2 Connections
See M900S User Manual for detailed diagram for connecting radio to network or PC utilizing the power over Ethernet
(PoE) J-Box cat-5 cables.
NOTE: DO NOT APPLY DC POWER TO THE M900S-SU or M900S-AP UNTIL THE ANTENNA IS
ATTACHED WHEN USING THE “e” ANTENNA OPTION, OTHERWISE DAMAGE TO THE RADIO MAY
OCCUR.
5. Setting the Maximum RF Power
When installing M900S-AP or M900S-SU there are several FCC certified antennas options available. Due to FCC
restrictions the professional installer must manually set the maximum power when any antenna gain greater than 10 dBi
is used upon which antenna is being used, since the max power of the radio is +26 dBm and the max EIRP allowed is
+36 dBm. The table below shows the maximum power the radio must have to achieve an EIRP of +36 dBm or 4 watts
(FCC limit). Only the antennas listed below are allowed to be used with the radio.
Antenna Model Antenna Gain (incl/cable loss) Radio Max power setting
BS915XL7 (Omni) +8.65 dBi +26 dBm (no change required)
PC9013N (Yagi) +15 dBi +21 dBm
Note that in all cases, Antenna Gain + Radio Max Power Setting = 36. Once set, the powerleveling feature in the SU
will still operate normally, but the maximum EIRP will never exceed 4 watts (+36 dBm).
NOTE: IT IS THE RESPONSIBILITY OF THE INSTALLER TO ENSURE THAT THE FCC
REQUIREMENTS DESCRIBED ABOVE ARE MET.
The telnet command to change the maximum power is:
maxpower <max power in dBm>
The flash memory must be updated after running the command.
The command must be run on the M900S-AP or M900S-SU (via telnet or serial port session) prior to installing the
antenna and while the Opmode is OFF.
Example: To set the max power to 21 dBm for the Cushcraft Yagi Antenna:
#> maxpower 21
#> Updateflash systemsetting
Prof Install Guide for M900S Access Point and Subscriber Unit
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6.0 INSTALLATION INSTRUCTIONS
The radio unit may be installed on a pole or a flat surface per the drawing below:
TO ANTENNA TO ANTENNA
BOLTS FOR MOUNTING TO WALL
NOT SUPPLIED
BRACKETS (SUPPLIED)
POLE MOUNTING WALL MOUNTING
Please see the M900S User Manual for instruction on grounding and weatherproofing the installation. In addition to the
guidelines listed in the User Manual, installers must cover cable-SMA connector with heat shrink tubing to provide
weatherproofing of the RF cable connectors.
Prof Install Guide for M900S Access Point and Subscriber Unit
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6.1 Yagi Antenna
To install the Cushcraft Yagi PN # PC9013N antenna please see the drawing below
Add Drawing of antenna mounting
6.2 Omni Antenna
To install the Comtelco PN #BS915XL7 antenna, please follow the instructions below. These antennas recommended
for access points only, but may be used with subscriber units.
Insert Omni mounting picture
7. Antenna Alignment (Applies to SU Only)
To align the SU antenna for optimal performance, follow the procedure below.
Once the SU is installed and aimed in the general direction of the AP, it is time to perform an RSSI test to determine the
signal strength from the AP, and to precisely align the SU antenna for maximum signal strength.
SU Antenna Alignment Procedure
1. Ensure AP is in opmode AP
2. Telnet into the SU (while in opmode “OFF”) or access the radio via hyperterminal
3. Type command SSRSSI <channel> <e> - Example SSRSSI 3 e (chan. 3, external antenna port)
4. Telnet session screen will begin a continuous readout of the received signal strength.
5. As you view the RSSI reading, move the antenna in the horizontal and vertical planes until the maximum RSSI
reading is achieved. For short links you can expect an RSSI of –70 dBm or better. For longer links and RSSI
of –80 dBm is acceptable. Any RSSI of less than –85 dBm may be too weak for the radios to reliably associate
and pass data.
6. If it is not possible to receive an adequate RSSI reading, it may be necessary to reorient the AP (up/down,
left/right), to increase the output power of the AP, or to move the SU to a location with better line-of-sight
conditions to the AP.
Once you are satisfied with the RSSI reading, tighten down the antenna in the optimum position. To stop the RSSI
continuous readout, hit SPACE, then ENTER.
Note: The RSSI LED indicators will illuminate as the signal gets stronger , providing a guide for aligning the antenna .
This concludes the installation process.

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