Axxcelera Broand Wireless EX-F058 AB-Access EXTENDER User Manual part 2

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Date Submitted	2001-07-04 00:00:00
Date Available	2001-07-04 00:00:00
Creation Date	2001-07-04 09:40:29
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Document Title	User manual part 2

AB-ACCESS
U-NII PRODUCT INSTALLATION MANUAL
SYSTEM
for Subscriber Units, Base Stations, Access Points
and AB-Access Extender Units
Internal DRAFT Copy
Document Number: ABA-U-NII-PIM-3 (part2 – chapters 7 to 11)
May 2001
Company Proprietary
SECTION 7
Subscriber Unit Installation
7 Subscriber Unit Installation
TBD: Update the figure numbers etc. in this section an onwards.
7.1 Installation Overview
The Subscriber Unit installation steps are as follows:
1. Install the mounting pole and mount the outdoor Subscriber Unit (see Figure 6-1).
2. Install the indoor junction box.
3. Route the interconnect cable. Connect it to the outdoor Subscriber Unit and the indoor
junction box.
4. Ground both the outdoor Subscriber Unit and indoor junction box.
5. Perform initial startup and testing.
Figure 7-1 AB-Access Subscriber Unit Installation Overview
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7.2 Installing Mounting Pole
Once you have selected a site for installing the outdoor transceiver/Subscriber Unit, determine
what type of surface you will use for your installation. Select from the following list:
• Installing on a Brick Or Masonry Wall
• Installing on a Wall With Wood Siding
• Installing on an Antenna Mast
The following sections describe the installation procedure for each of the above.
7.2.1 Installing on a Brick or Masonry Wall
Table 7-1 describes the tools and equipment needed when installing on a brick or masonry wall.
Table 7-1 Required Tools And Equipment
Tools
Power drill
¼ inch masonry drill bit
A bubble level or plumb line
Phillips head screwdriver or
power drill
Hammer or mallet
Adjustable wrench
Equipment
Mounting pole
Anchor sleeves
Lag bolts
Quantity
1. Place the mounting plate against the wall.
2. Using a level, be sure that the mounting pole is perpendicular to the ground.
3. Using a pencil, mark the hole locations for the drilled hole locations (Figure 6-2).
Figure 7-2 Mounting Pole Drill Locations
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4. Set the mounting pole aside.
5. Using a ¼ inch masonry drill bit, drill holes approximately ½ inch deep at the marked
locations.
6. Insert the anchor sleeves into the drilled holes. Using a small hammer, gently tap the
anchor sleeves into the masonry until tight. Check that the anchor sleeves are flush
with the wall. (Figure 6-3)
7. Align the mounting pole with the drilled holes.
8. Insert a lag bolt in each of the holes and hand tighten.
9. Tighten all lag bolts with a wrench, being careful not to over tighten.
Figure 7-3 Mounting Pole Installation Using Expansion Sleeves and Lag Bolts
Attention! The mounting pole must be mounted in a vertical position. Failure to do so
may result in improper alignment of the outdoor transceiver.
IMPORTANT – Before you install the SU, be sure to record, for future
reference, the MAC address found on the SU.
10. Now proceed to Installing the Outdoor Subscriber Unit in Section 6.3.
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7.2.2 Installing on a Wall with Wood Siding
Table 7-2 describes the tools and equipment needed when installing on a wall with wood siding.
Table 7-2 Required Tools and Equipment
Tools
Power Drill
1/8 inch drill bit
Bubble level or plumb line
Phillips head screwdriver or
power drill
Equipment
Mounting pole
#6 wood screws
Spacers
Quantity
1. Place the mounting plate against the wall. Using a level, be sure that the mounting
pole is perpendicular to the ground.
This procedure is similar to that shown previously in Figure 6-2.
Note that when mounting on clapboard siding, you may need to use spacers to make
sure that the mounting pole is perpendicular, as shown in Figure 6-4.
Attention! The mounting pole must be in a vertical position for proper alignment of
the outdoor transceiver.
2.
3.
4.
5.
Mark the locations for the drilled holes.
Remove the mounting pole and set it aside.
Drill 1/8 inch diameter in the places marked.
Use #10 or #12 wood screws to secure the mounting pole to the wall and
hand tighten.
6. Using the level, check that the mounting plate is perpendicular to the ground.
Readjust if necessary (you might need to add or remove spacers) and then tighten all
screws with a screwdriver or power drill, being careful not to over tighten.
Figure 7-4 Mounting Pole on Clapboard Siding
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7. Now proceed to Installing the Outdoor Transceiver.
7.2.3 Installing on an Antenna Mast
Table 7-3 describes the tools and equipment needed when installing on an antenna mast.
Table 7-3 Required Tools and Equipment
Tools
Adjustable wrench
Equipment
U-bolts
Washers
Hex nuts
Quantity
1. Position the mounting pole on the pole or antenna mast (Figure 6-5).
2. Insert the U-bolts around the pole and through the holes in the mounting pole.
3. Install a washer and nut to each side of the threaded U-bolts and hand tighten.
Figure 7-5 Mounting Pole Installed on Pole or Antenna Mast
4. Tighten nuts equally until mounting pole is secure and cannot rotate.
Attention! The mounting pole must be mounted in a vertical position. Failure to do so
may result in improper alignment of the outdoor transceiver.
Warning! The mounting pole must be grounded. See Grounding the System in Section 6.6.
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7.3 Installing the Outdoor Subscriber Unit
Now that you have installed the mounting pole, you are now ready to install the outdoor
Subscriber Unit (SU) to the mounting pole. Table 7-4 describes the tools and equipment needed
to install the SU.
Table 7-4 Required Tools and Equipment
Tools
Phillips-head screwdriver
3/16” hex wrench
Equipment
Pole clamp
Washers
Mounting screws
Quantity
1. Loosen the mounting screws and place the outdoor Subscriber Unit on the mounting pole, as
shown in Figure 6-6.
2. Hand tighten the mounting screws.
3. Rotate the outdoor transceiver in the direction of the Access Point.
4. Tighten the mounting screws.
Figure 7-6 Outdoor Subscriber Unit Mounted on Wall
7.4 Preparing The Indoor Junction Box
This section explains how to prepare the indoor junction box for installation. You will drill the
mounting holes, but leave the box uninstalled, as it is easier to route the interconnect cable.
Table 7-5 describes the tools and equipment you will need.
Table 7-5 Required Tools and Equipment
Tools Required
Phillips-head screwdriver
Flat head screwdriver
Power drill
1/8 inch drill bit
Equipment Required
Screws
Wallboard inserts
Quantity
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1. Select a location for the junction box. This should be:
• Somewhere you can easily connect to your PC and a power outlet.
• Somewhere that is accessible for service and troubleshooting (not too close to the floor).
2. Remove the two screws which attach the junction box faceplate to the wall mount.
3. Set aside the faceplate with PCB and jack.
Attention! Be careful not to damage the two LEDs when removing the PCB.
4. On the Wall Mount portion of the Wall Box, use a flat head screwdriver, or a pair of thinnosed pliers, to break out the pre-scored section of casing wall along the bottom edge of the
junction box (see Figure 7-7). This is where later on you will route the interconnect cable.
Figure 7-7 Junction Box Wall Mount (Face Plate and PCB Removed)
5. Using the wall plate as a template, mark the mounting hole locations, as shown in Figure 6-7.
6. Drill 1/8 inch diameter holes at the marked locations.
7. Insert the wallboard inserts.
For now, set the junction box to one side, leaving it disassembled. You will reassemble it and
mount it on the wall when you have prepared and routed the interconnect cable and grounded the
system.
7.5
Installing the Interconnect Cable
7.5.1 Routing the Interconnect Cable
Now that you have installed the outdoor Subscriber Unit and indoor junction box, you are ready
to route the interconnect cable.
1. Select where the cable will enter the building from the outside (Figure 7-8).
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NOTE - Add a
drip loop at wall
penetration to
prevent water
from entering
Figure 7-8 Interconnect Cable Routing Solutions
2. Once you have chosen the route, determine the length of cable required. Allow three extra
feet on each end to allow for strain relief as well as any bends and turns.
3. Install the cable, leaving the ends free and ready to fit the RJ-45 connector (transceiver end),
and install to the indoor junction box.
4. Remember to form a drip loop on the exterior of the building where the cable enters the
penetration. This will help prevent water from entering.
7.5.2 Preparing the Interconnect Cable
Table 7-6 shows the tools you need to install an RJ-45 connector on the outdoor subscriber end
of the interconnect cable.
Table 7-6 Required Tools and Equipment
Tools
Equipment
Crimping tool (specific to RJ-45 RJ-45 connector (metal bodied)
used)
Wire stripper
Small wire cutters
Quantity
1. Remove the grommet (Figure 7-9) and clamping plate from the Subscriber Unit by undoing
the two screws. Be careful not to lose them if you are working on a ladder.
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NOTE: The Grommet is made of a special conductive material used to complete
the ground between the Subscriber Unit and indoor junction box.
Figure 7-9 Grommet Location -- Underside of Subscriber Unit
2. Insert the cable end through the grommet clamping plate (Figure 7-10).
1. Insert the cable end through the grommet. The tapered end of the grommet should be
opposite the cable end.
2. Strip 1 inch of insulation off the cable end. Leave 3/8 inch of shielding showing, and trim
the wire ends flat ½ inch from there.
3. Using a piece of 1inch squared tinned copper foil, wrap the foil around the shield/braid and
sheath with the left edge aligned with the edge of the braid, as shown in the following
Figures 7-10 and 7-11.
1" square tinned copper foil - wrap the copper foil around the
shield/braid and sheath with the left
edge aligned with the edge of the braid.
Insert wire
into channels
Tab on
underside
Shielding
3/8"
Pin 1
Note direction
of taper
Grommet
clamping
plate
Grommet
1/2"
Grommet is
conductive
and used to
complete
the ground
Figure 7-10 Outdoor Subscriber Unit of the Interconnect Cable with Cable Preparation
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4. Separate the twisted pair wires and align by color code in the order listed in the following
Table 7-7.
Figure 7-11 Outdoor Subscriber Unit End of the Interconnect Cable with Shielding
Table 7-7 Cable Legend for Interconnect Cable
Pin
Color Code
White / Orange
Orange
White / Green
Blue
White / Blue
Green
White / Brown
Brown
5. Using pin 1 as a reference, insert the individual wires into the channels of the RJ-45
connector. Each wire should penetrate the channels until flush with the connector end. The
copper foil tape should extend past the casing of the RJ-45 connector by approximately ½
inch.
6. When all wires are inserted into the channels in their correct order, use the crimping tool to
permanently crimp the wires to the connector.
Attention! Carefully read the instructions for the crimping tool you are using. Use the
correct crimping tool for the RJ-45 connector you are using. Incorrect
installation of the RJ-45 connector may result in a bad connection between the
outdoor transceiver and the indoor junction box.
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7.5.3 Connecting to the Outdoor Subscriber Unit Transceiver
Now that you have prepared the interconnect cable, you are ready to connect the cable to the
outdoor Subscriber Unit.
Attention! Always Disconnect Power from wall box BEFORE inserting RJ-45 connector
into transceiver. This prevents arcing damage from occurring.
1. Insert the RJ-45 connector into the receptacle located underneath the outdoor Subscriber Unit
(refer to Figure 6-9). Make sure that the connector tab engages the slot in the receptacle.
2. Slide the grommet up the cable and press it into the bottom of the outdoor transceiver.
3. Slide the grommet clamp up the cable and align the holes with the mounting holes on the
bottom of the outdoor transceiver.
4. Insert the two screws in the mounting holes and tighten until the grommet has a slight bulge.
Be sure to tighten both screws equally so that the grommet is seated correctly.
5. Secure the interconnect cable to the mounting pole with the cable clip, as shown in
Figure 7-12.
Figure 7-12 Interconnect Cable Installation to Subscriber Unit -- Bottom View
7.5.4 Connecting to the Indoor Junction Box
Note that the junction box should still be disassembled and not screwed to the wall at this point.
1. Strip 2 inches of insulation off the junction box end of the interconnect cable.
Attention! Don’t cut off the shield from the cable – you will need it to ground the
system later.
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2. Insert the cable end through the notched out section of the junction box.
3. Reinstall the PCB into the junction box using the two screws, allowing enough of the
interconnect cable to be able to reach the punch down block and wrap around the mounts of
the cover plate for strain relief.
4. Using Figure 7-13 as a guide, use the 110 punch down tool to punch down each wire into the
slot on the punch down block (reference the following Figure 6-16 which shows the inside of
the Junction Box).
Figure 7-13 Interconnect Cable Connections to Indoor Junction Box
5. Snip off excess wire ends, if necessary.
Attention! Avoid excessive wire loops when connecting the wire to the punch down block.
For now, set the junction box to one side leaving it disassembled. You will reassemble it and
mount it on the wall when you have grounded the system.
7.6 Grounding The System
The AB-Access System must be properly grounded in order to protect it and the building it is
installed on from lightning damage. This requires grounding both the outdoor transceiver and
indoor junction box. The following Table 7-8 describes the tools you will need to ground the
system.
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Table 7-8 Required Tools and Equipment
Tools
Mallet
Wire stripper
Wire cutters
Hex wrench
Equipment
Grounding rod
#8 braided copper wire
Grounding lugs
Grounding clamp
Quantity
7.6.1 Installing A Grounding Rod
1. Place the grounding rod to allow for the shortest possible path from the grounding cable to
the outdoor Subscriber Units.
2. Drive the grounding rod into the ground at least eight inches from the ground surface.
3. Attach a grounding clamp on the grounding rod. You will use this clamp to attach grounding
wires for both the outdoor Subscriber Unit and indoor junction box.
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Indoor
wall box
Outdoor
transceiver
Grounding cable
(10 AWG)
Grounding cable
(10 AWG)
6 AWG
Premises electrical
ground
Clamp
Grounding
rod
Concrete
foundation
Figure 7-14 Ground Connections for Subscriber Unit
7.6.2 Grounding the Outdoor Subscriber Unit
1. To ground the outdoor Subscriber Unit, you will need to install a grounding wire from the
mounting pole to the grounding rod. The wire should be long enough to reach from the
mounting pole to the grounding rod with 3 to 6 feet extra to allow for strain relief.
2. Connect a ground lug to one end of a measured length of copper braided wire by crimping
the lug to the wire, as shown in Figure 7-15.
3. Remove one of the lower mounting screws of the mounting pole. Insert a screw through the
grounding lug terminal and re-install it to the mounting pole.
4. Attach the grounding wire to the clamp on the grounding rod. If necessary, use wire staples
to secure the grounding wire to the outside wall.
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Ground lug with #10
awg coppe r wire
Figure 7-15 Mounting Pole with Ground Lug
7.6.3 Grounding the Indoor Junction Box
To ground the indoor junction box, you will need to install a grounding wire from the junction
box to the grounding rod. The wire should be long enough to reach from the junction box to the
grounding rod with 3 to 6 extra feet to allow for strain relief.
1. Feed the grounding cable through the broken out section of the wall cover (alongside the
interconnect cable).
2. Connect a ground lug to the grounding cable by crimping the lug to the wire, as shown in
Figure 7-15.
3. Remove the hex nut on the grounding post, as shown in Figure 7-16.
4. Install the grounding lug terminal onto the grounding post.
5. Attach the wire shield of the interconnect cable to the ground post. You may need to crimp
or solder an extra length of wire to the shield in order to attach it to the grounding post.
6. Re-install the hex nut to the grounding post and tighten.
7. Attach the grounding wire to the clamp on the grounding rod.
8. Use the provided small wire tie to firmly attach the interconnect cable to the ground lug.
This will provide strain relief for the cable and prevent the data and power leads from being
disturbed during installation.
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Figure 7-16 Indoor Junction Box Ground Connection
Indoor
Junction Box
Ground
Connection
7.6.4 Assembling and Mounting the Junction Box
1. Place the junction box wall mount over the drilled holes.
2. Insert the screws and tighten.
3. Reinstall the faceplate onto the junction box using the two screws.
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SECTION 8
Indoor Junction Box
8 Indoor Junction Box
The indoor junction box/wall box consists of a PCB that inserts power into the CAT-5 cable and
provides secondary lightening protection. Photos of the indoor Junction Box are shown in
Figures 8-1 and 8-2.
Note, Four pre-scored
notches that can be
removed for cable
insertion.
Figure 8-1 Indoor Junction Box (Wall Plate Enclosure)
The indoor junction box can be wired for ATM25 or Ethernet interfaces. Note that the PCBs
may be housed in separate plastic boxes or mounted in a card cage. Table 8-1 describes the
cable legend to follow.
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Figure 8-2 Indoor Junction Box Inside
Table 8-1 Cable Legend - Junction Box Interconnect Cable
Pin
Signal
Transmit High (+)
Transmit Low (-)
LED2
Supply Minus
Supply Plus
LED1
Receive High (+)
Receive Low (-)
Color Code
White / Orange
Orange
White / Green
Blue
White / Blue
Green
White / Brown
Brown
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8.1 ATM Cross-Over Cable
Figure 8-3 shows how to wire an ATM cross-over cable:
Pin
Pin
Figure 8-3 ATM Cross-Over Cable
8.2 FVC DB-9 To RJ-45 Converter
Figure 8-4 shows a DB-9 to RJ-45 converter.
Figure 8-4 DB-9 To RJ-45 Converter
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SECTION 9
Testing the System
9 Testing the System
9.1 Introduction
This section explains how to:
• Power up your AB-Access System
• Use a PC (known as the Test PC) to check the alignment of your outdoor transceiver
• Make sure you have the best connection to your service provider.
Attention! This operation may need two people – one to operate the Test PC and one
to align the outdoor transceiver.
Note: For purposes of AB-Access Extender, the two ends of the AB-Access Extender link appear
like static point-to-point AP and SUs with respect to testing.
9.2 Equipment Required
You will need the following equipment to test your AB-Access System:
• Standalone PC or laptop (Test PC) with a web browser (e.g., Netscape Navigator 4.5 or
higher, Internet Explorer 4.0 or higher).
• Standard 10Base-T Ethernet cable with RJ-45 connectors to connect the Test PC to the
indoor junction box.
You will also need to know the correct IP address and subnet mask to configure the Test PC.
Your service provider should have supplied these. The defaults for an SU are 192.168.3.254
Netmask 255.255.255.0.
9.3 Testing
In order to be able to check the alignment of your outdoor transceiver, along with the connection
to your service provider, you need to know how to configure an IP address and subnet mask. If
you are not sure how to do this, look in the manual that came with the PC you are using as the
Test PC. You could also check the online help.
9.3.1 Connecting Test PC
1. Connect the Test PC to the indoor junction box using a standard 10Base-T Ethernet cable
(with RJ-45 connectors).
2. Insert the power plug adapter into the indoor junction box.
3. Insert the AC power plug into an AC outlet.
4. Check the LEDs on the junction box.
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Attention! If the yellow LED is on, this indicates that power is being supplied to the unit.
If not, check the connections.
9.4 Configure The IP Address
1. Switch on the Test PC.
2. Configure the Test PC to use the recommended IP address supplied by your system provider
or installer (example: 192.168.3.1).
3. Configure the Test PC to use the recommended netmask supplied by your system provider or
installer.
Attention! These steps make sure that the test PC is on the same subnet as the AB-Access
System. The last number in the Test PC’s IP address must be different from
the last number in the IP address of the AB-Access System (see below).
9.5 Using the RSSI Interface for RF Alignment
One of more challenging aspects to RF systems is proper alignment of antennas. With distances
up to 3 miles, it can be very difficult to align an SU with an AP. To solve this problem, the RF
signal strength and packet error rate can be measured to provide feedback, which can be used to
properly align a unit. This information is typically called the Receive Signal Strength Indicator
(RSSI).
While the RSSI interface is always present, it is primarily designed for use with SUs being
initially deployed. To use the RSSI interface, the SU should be set to “installation” mode when
upgraded in the Operation Center. Installation mode is used for SUs to be used in a dynamic
registration (EMS) environment. When an SU is in installation mode, the SU will wait for the
installer to align the antenna and will register only after the installer has initiated the registration
sequence via the browser interface. This is slightly different from registration mode, where the
SU automatically registers with the strongest AP immediately after booting.
For realignment, the SU must be set back into Installation mode from the hmm sub process by
issuing the command:
hmm> system mode installation
While the RSSI interface is always present, when not set to Installation mode, the SU will not
attempt registration once the proper channel is selected.
The RSSI application can also be effective in Static or Registration mode in analyzing the RF
landscape with respect to other AB-Access components. Using the RSSI interface, the network
manager can get readings on RSSI and Packet Error Rates in a convenient display. The only
difference is the SU to register in these modes. Registration via the RSSI interface only occurs
when the unit is in Installation mode.
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To take advantage of this information, the AB-Access Subscriber Units contain an interface,
which allows the installer to properly align the unit. Once an SU is mounted in place and
roughly aligned using a compass, the installer can attach a computer to the terrestrial interface of
the SU and interact with the RSSI web page on the SU to perform alignment (reference Figures
9-1 and 9-2). Connecting to the SU and enabling the RSSI interface is performed in the manner
described in the following sections.
NOTE: The RSSI interface is best viewed using a screen resolution of at least 800x600 with 256
colors. Netscape Navigator is recommended as the viewing browser, reference following Figure
9-1 RSSI Sample Web Page.
9.6 Display The Security Page
1. From your Test PC, start up a web browser.
2. In the URL field, enter the default IP address of the AB-Access System (supplied by your
service provider (example, http://192.168.3.2).
3. The Security screen appears as shown in Figure 9-1.
Figure 9-1 Security Screen
9.7 Optimize The Antenna Alignment
At the security screen, enter the Service Provider Identifier and Security Key.
supplied by your service provider as a secure login.
The key is
Click Next. The Antenna Alignment screen appears as shown in Figure 9-2.
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Figure 9-2 RSSI Sample Web Page
1. Note the desired channel for registration (example, Channel 14, horizontal polarization).
2. Attach a computer to the terrestrial interface of the SU.
3. Change computer IP address to be in the same subnet as the SU. For example, set the
computer to address 192.168.254.1 to connect to an SU with the IP address of
192.168.254.254.
4. Verify connectivity to the SU using the Ping utility (example, ping 192.168.254.254)
5. Open a browser interface on the computer (Netscape Navigator is recommended)
6. Enter the address of the RSSI web interface:
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http:///installation/step2 (ex http://192.168.254.254/installation/step2)
7. This will display two columns of data, one column for RF channels using horizontal
polarization and a second for vertical polarization. Turn the SU in 2 degree arcs until the
channel desired is listed as “Good” and is green in color.
8. Click on the “next” button to initiate registration of the SU with the AB-Access network.
The RSSI web interface will refresh itself every 5 seconds, allowing the installer to adjust the SU
until the best alignment possible is achieved. The RSSI application will actually rank connection
validity. Table 8-1 details these rankings.
Table 9-1 RSSI Link Validity
Link Validity
Good
Marginal
Bad
Color
Green
Yellow
Pink
CNR
Greater than or equal to 10dB
Less than 10dB
Non Applicable
PER
Less than 1%
Less than 1%
Greater than 5%
: PER is Frame Downlink Header Error Rate (FDHDR)
: CNR = RSSI –81.6dbm
Bad links will not allow any registration. Marginal links will allow registration but may be
subject to interference by a number of factors. Good links will be the best selection for
registration.
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Specifications
SECTION 10
10 Specifications
10.1 Subscriber Unit Antenna
Table 10-1 describes the Subscriber Unit (SU) Antenna specifications and Figure 10-1 shows a
typical SU antenna pattern.
Table 10-1 Subscriber Unit Antenna Specifications
Peak Gain
3 dB beam width
Front to back ratio
Sidelobe suppression
Input impedance
Polarization
VSWR
18 dBi
20° azimuth x 20° elevation
30 dB
15 dB
50 Ohms
Linear – vertical or horizontal switchable
2:1 max
Figure 10-1 Typical SU Antenna Pattern
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10.2 Access Point Antenna
Table 10-2 describes the Access Point antenna specifications and Figure 10-2 shows a typical AP
antenna pattern.
Table 10-2 Access Point Antenna Specifications
Peak gain
3 dB beamwidth
Front to back ratio
Sidelobe suppression
Input impedance
Polarization
VSWR
18 dBi
typical
60° azimuth x 7° elevation
25 dB
15 dB
50 ohm
Linear vertical or horizontal
switchable
2:1 max
typical
min
min
typical
20.00
Gain/dBi (Az-Ver)
15.00
Gain/dBi (Az-Hor)
Gain/dBi (El-Ver)
10.00
Gain/dBi (El-Hor)
Gain (dBi)
5.00
0.00
-5.00
-10.00
-15.00
-20.00
180
168
156
144
132
120
96
108
84
72
60
48
36
24
12
-12
-24
-36
-48
-60
-72
-84
-96
-108
-120
-132
-144
-156
-168
-180
-25.00
Angle (deg)
Figure 10-2 Typical AP Antenna Pattern
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10.3 AB-Access Extender Antenna
Table 10-3 describes the AB-Access Extender antenna specifications and Figure 10-3 shows a
typical EX antenna pattern.
Table 10-3 AB-Access Extender Antenna Specifications
Peak gain
3 dB beamwidth
Front to back ratio
Sidelobe suppression
Input impedance
Polarization
VSWR
23 dBi
typical
10° azimuth x 10° elevation
25 dB
15 dB
50 ohm
Linear vertical or horizontal
switchable
2:1 max
typical
Min
Min
Typical
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Company Proprietary
TBD: Insert AB-Access Extender Antenna Pattern image
Figure 10-3 Typical EX Antenna Pattern
TBD: Update all section and figure numbers from here on forward
10.4 Modem Specifications
The QPSK modem design for the transceiver is driven primarily by the 32-symbol correlator and
Decision Feedback Equalizer (DFE). The correlator output is used for:
•
•
•
•
•
Burst detection
Digital AGC setting
Phase reference
AFC control
Course symbol timing.
The DFE is used to remove the Inter-Symbol Interference (ISI) introduced by the filters and
imperfect sampling, as well as compensate for pre-cursor and post-cursor channel multipath.
Table 10.4 shows the Modem Specifications.
Table 10-4 Modem Specifications
Modulation
Symbol rate
ADC
Receive filter
AWGN performance
Equalizer
Training
Transmit filter
Coherent QPSK
12.5 Msym/s
10 bits I and Q
Root raised cosine =0.35
14.4 dB CNR for 10-4 BER (including 3 dB
implementation loss)
Decision Feedback (DFE); 5 forward taps, 4
feedback taps; delay spreads up to 0.32 s;
post cursor to cursor ratios up to 0.5
32 symbols per burst
Raised cosine =0.35
10.5 Environmental Specifications
10.5.1 Temperature/Humidity Operation
The entire unit is constructed in a weatherproof housing and designed for outdoor use. The
minimum and maximum operating temperatures and the relative humidity for all system
elements are listed in Table 10.5.
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Table 10-5 Environmental Specifications
Item
Subscribe Unit,
Access Point and
AB-Access Extender
Operating
Operating
Operating Humidity,
Temperature Range, Temperature Range, max
min
max
-40°C (-40°F)
100
55°C (131°F)
10.5.2 Grounding
Article 810 of the U.S. National Electric Department of Energy Handbook 1996 specifies that
radio and television lead-in cables must have adequate surge protection at or near the point of
entry to the building. The code specifies that any shielded cable from an external antenna must
have the shield directly connected to a 10 AWG wire that connects to a building ground
electrode.
10.5.3 Electrical Specifications
The Subscriber Unit is powered from a typical notebook-style power supply that is included with
the unit. This power supply is plugged into a standard 110/220 VAC main (or a UPS unit) and
the output supply of 48 VDC is plugged into a wall box which feeds the –48 VDC through the
CAT5 cable to the installed units, reference Figure 9-3. The power supplies used to convert 110
VAC to 48 VDC are 80% efficient at this load.
Adaptive Broadband U-NII Product Installation Manual 07/04/2001
Wire shield to
grounding
post and to
grounding
10-5 rod
Company Proprietary
Figure 10-4 Powering SU through Junction Box
10.5.4 Power Consumption
Table 10-6 shows the power consumption of an SU, EX and AP.
Table 10-6 SU, EX and AP Power Consumption
Item
Power Source
Subscriber Unit,
AB-Access
Extender and
Access Point Unit
48 VDC
Power Range
Power Consumption
W (typical)
38 to 72 VDC including
14
fluctuations
10.5.5 Distance Limitations
The SU uses shielded outdoor rated CAT5 cable between the installed unit and the indoor
junction box. For the unit to receive acceptable voltage to operate, this cable is limited to 60
meters. Between the junction box and the customer premises PC (or hub, Ethernet Switch,
Router, etc.), the system uses standard indoor CAT5 cable, which is rated for a maximum
functional distance of 100 meters when running the Ethernet 10BaseT interface. For an AP (or
SU) connected via ATM25, the distance limitation of the data signaling is 270 meters.
10.5.6 Physical Specifications
Table 10-7 provides the weight and dimensions of an SU.
Table 10-7 SU Weight and Size
Item
Subscriber unit
Weight
7.8 lb. (3.5 kg)
Dimension
13W x 13H x 3D in.
(32W x 32H x 8D cm)
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10.6 Cable Specifications
10.6.1 Outdoor Cable Specifications
The following Table 10-8 describes all the outdoor cable specifications.
Table 10-8 Outdoor Cable Specifications
Item
Product type
Performance category
Frequency
No. of pairs
Impedance
Capacitance (nominal)
Attenuation
Near end cross talk
DC resistance/unbalanced
Shielded
Wire/cable type
Wire size
Cable outer diameter (nominal)
Jacket thickness (nominal)
Cable jacket material
Conductor material
Insulation material
Shield type
Dielectric breakdown
Operating temperature range
Installation temperature range
Specification
Twisted pair
CAT 5
100 MHz
100 Ohms +/- 15 Ohms
4.5 nF/100 meters
EIA/TIA 568 CAT5
EIA/TIA 568 CAT5
< 10 Ohms/100 meters max.
Yes
Solid
24 AWG
0.232 inches
0.030 inches
Polyethylene, UV resistant
Copper
Solid polyolefin
BBDN or BBDG
2500 Volts DC conductor to conductor
-40° C to +70° C
0° C to +60° C
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10.7 RJ-45 Plug Specifications
Table 10-9 describes all the RJ-45 plug specifications.
Table 10-9 RJ-45 Plug Specifications
Item
Product type
No. of positions
Shielded
Cable style
Performance category
Latch style
Keyed
Housing material
Housing material flammability rating
Contact material
Contact mating area plating
Contact termination end plating
Conductor outer diameter (mm [in])
Specification
Plug
No
Round solid
High (Cat 5)
Standard
No
Polycarbonate
UL 94V-2
Phosphor bronze
Gold (50) over nickel
Gold Flash over nickel
.89-.99 [.035-.039]
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Glossary
SECTION 11
11 Glossary & Acronyms
TERM
DEFINED
Access Point
Anchor Switch
Antenna
Asynchronous
ATM
ATM Switch
Available
(ABR)
Azimuth
Bandwidth
Bit
An Access Point (AP) is a component of a
Base Station (BS) that contains the antenna
used to communicate with a Subscriber Unit
(SU).
The Anchor Switch (AS) is an ATM access
switch that is a component of a Base Station
(BS).
A device for transmitting and/or receiving
radio waves.
A data transmission method in which data
may be sent at irregular intervals (without
reference to clock signals).
Asynchronous Transfer Mode is a highperformance, cell-oriented switching and
multiplexing technology, which utilizes fixedlength packets to carry different types of
traffic. It integrates the multiplexing and
switching functions, is well suited for bursty
traffic, and allows communications between
devices that operate at different speeds.
The ATM switch provides layer 2 switching of
ATM cells through virtual circuits. An ATM
switch is contained in the SU, the AP, and the
AS.
Rate Service that provides rate-based flow control
and is aimed at data traffic such as file
transfer and e-mail.
The angle along the horizon usually
referenced to north.
The
data
carrying
capacity
of
communications channel, measured in Hertz
as the difference between the highest and
lowest frequencies of the channel.
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Base Station
The Base Station is the part of the AB-Access
System that sends signals to and receives
signals from the Subscriber Units (SUs) to
enable communication with the WAN.
Baud
A measure of data transmission speed. The
baud rate denotes the number of symbols per
second.
Bit Error Rate
The Bit Error Rate (BER) is the fraction of
transmitted bits that are received in error.
Cell
A 53-Byte packet of data used in ATM
networks. Also used to refer to the coverage
area of one Base Station.
Constant Bit Rate Service that operates on a connection basis
(CBR)
and offers consistent delay predictability; used
for applications such as circuit emulation,
voice, and video.
Control Server
The Control Server (typically one per BS) is a
computer responsible for management of the
BS, its APs, and the associated SUs.
DS1
A data transmission rate of 1.544 Mbps, also
referred to as a T-1.
DS3
A data transmission rate of 45 Mbps
Element Management The Element Management System (EMS),
System
located on a workstation at an appropriate
point in the network, allows you to configure,
control, and monitor all components of the
AB-Access System.
MIB
Management information base allows external
management system access.
Multiplexer
A multiplexer is device or system capable of
combining elementary streams into one
aggregate transport stream.
Network
A network is an interconnection of computer
systems, terminals, or data communications
facilities.
OC3
A data transmission rate of 155 Mbps
Packet
A packet is a sequence of data, with
associated control information, that is
switched and transmitted as a whole.
Packet Switching
Packet switching is the data transmission
method that divides messages into standardsized packets for greater efficiency of routing
and transport through a network.
Parsing
Parsing is the process of analyzing a data
stream and breaking it down into more easily
processed components.
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Company Proprietary
Permanent
Virtual Provides
end-to-end
connectivity
for
Circuit
transmission in a network.
Point-to-Point
A single communication circuit connecting two
locations.
Point-to-Multipoint
A communications circuit connecting one
location to many locations.
Radio Frequency
Radio frequency (RF) is a portion of the
electromagnetic spectrum in the frequency
range of 100 kHz to 20 GHz.
Subscriber Unit
The Subscriber Unit (SU) is the part of the
AB-Access System that is installed at the
customer
premises
and
provides
communication with the Base Station (BS).
Synchronous
A data transmission method in which data
transfer is at a fixed rate. The transmitter and
receiver are both controlled by clock pulses.
TCP/IP
Transmission
Control
Protocol/Internet
Protocol, a layered set of protocols that allows
sharing of applications among PCs, hosts, or
workstations in a high-speed communications
environment. The suite of protocols is
designed to allow communication between
networks regardless of the technologies
implemented in each network.
TDD
Time Division Duplex, the transmission
method where a single channel is used to
alternately carry data in each direction of a
link.
Time-Division
A form of multiplexing used with digital
Multiplexing
signals. A device scans individual channels in
rotation, takes bits from each channel,
transmits the bits in a string (according to a
predetermined sequence), and repeats the
process.
Transmitter
A transmitter is an electronic device,
consisting of oscillator, modulator, and other
circuits, that produce a radio or television
electromagnetic wave signal for radiation into
the atmosphere by an antenna.
Unspecified Bit Rate
Service that operates on a connection basis
and allows for raw cell or best effort transport
by the network. In this service, cells are
transported by the network whenever
bandwidth is available and traffic is presented
by the user. Data using UBR service is more
apt to be discarded during peak traffic times in
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Company Proprietary
deference to data using other classes of
service.
Uninterruptible
An optional BS element used to provide
Power Supply
power in the event of an AC power failure.
Variable Bit Rate- Service that operates on a connection basis
Real Time (VBR-RT)
and offers very low delay variance but
requires access to a variable amount of
network bandwidth; used for such applications
as packet video and voice.
Variable Bit Rate- Service that operates on both a connection
Non-Real Time (VBR- and connectionless basis and allows delay
NRT)
variance between the delivery of cells; used
for data applications which have potentially
bursty traffic characteristics, including LAN
interconnect, CAD/CAM, and multimedia.
Virtual Circuit
A logical connection, not a physical
connection, provides multiple connections that
can be defined simultaneously across a single
network facility, with each connection having
flexible bandwidth.
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Company Proprietary
11.1
Acronyms/Abbreviations
The following is a list of acronyms and abbreviations associated with the AB-Access System,
some of which may appear in this guide.
ACRONYM
DEFINED
AAL
ATM Adaptation Layer
ADC
Analog to Digital Converter
AFC
Automatic Frequency Control
AGC
Automatic Gain Control
ALG
Application Layer Gateway
AP
Access Point
ARP
Address Resolution Protocol
ARPAnet
Advanced Research Projects Agency Network
ARQ
Automatic Repeat Request
AS
Anchor Switch
ASIC
Applications Specific Integrated Circuit
ATM
Asynchronous Transfer Mode
ATMOS
ATM Operating System
AWGN
Additive White Gaussian Noise
BER
Bit Error Rate
BOOTP
Bootstrap Protocol
BS
Base Station
CBR
Constant Bit Rate
CHAP
Comite Consultatif International des
Radiocommunications
Challenge-Handshake Authentication Protocol
CIDR
Classless Interdomain Routing
CLIP
Classical Internet Protocol
CNR
Carrier To Noise Ratio
COTS
Commercial Off The Shelf
CCIR
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Company Proprietary
CPE
Customer Premise Equipment
CS
Control Server
dB
Decibel
dBm
Decibel over 1mW
DBS
Direct Broadcast Satellite
DC
Direct Current
DES
Data Encryption Standard
DFE
Decision Feedback Equalizer
DHCP
Dynamic Host Configuration Protocol
DS1,2,3
Digital Signal 1,2,3
EIRP
2.048 Mbps circuit supporting (30) 64 Kbps digital
channels for voice or data calls
Effective Isotropic Radiated Power
EMS
Element Management System
FCC
Federal Communications Commission
FDD
Frequency Division Duplex
FPMS
Fault and Performance Management System
Gbps
Gigabits per second
GFC
Generic Flow Control
GHz
Gigahertz
GUI
Graphical User Interface
I&Q
In Phase and Quadrature
IETF
Internet Engineering Task Force
IF
Intermediate Frequency
IP
Internet Protocol
ISI
Inter-Symbol Interference
ITFS
Instructional Television Fixed Service
Kbps
kilobits per second
LAN
Local Area Network
LLC
Logical Link Control
E1
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LOS
Line of Sight
MAC
Media Access Control
Mbps
Megabits per second
MDS
Multipoint Distribution Service
MIB
Management Information Base
MID
Mobile ID
MMDS
Multichannel Multipoint Distribution System
MSE
Mean Square Error
NAT
Network Address Translation
NMS
Network Management System
NOC
Network Operations Center
OAM
Operations, Administration, and Maintenance
OC3
Optical Carrier 3
OSI
Open Systems Interconnection
PAT
Port Address Translation
PCB
Printed Circuit Board
PHY
Physical Layer
POTS
Plain Old Telephone System
PPP
Point-to-Point Protocol
PTMP
Point to Multipoint
PVC
Permanent Virtual Circuit
QOS
Quality of Service
QPSK
Quadrature Phase Shift Keying
RAID
Redundant Array of Inexpensive Disks
RF
Radio Frequency
RFC
Request For Comment
RISC
Reduced Instruction Set Computer
RSSI
Receiver Signal Strength Indication
RT-VBR
Real Time Variable Bit Rate
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Company Proprietary
RX
Receiver
SAR
Segmentation And Reassembly
SCSI
Small Computer System Interface
SNMP
Simple Network Management Protocol
SNR
Signal to Noise Ratio
SO/HO
Small Office/Home Office
SONET
Synchronous Optical Network
STP
Shielded Twisted Pair
SU
Subscriber Unit
SUMP
Subscriber Unit Management Protocol
SVC
Switched Virtual Circuit
TCP/IP
1.544 Mbps circuit supporting (24) 56/64 Kbps
voice-grade channels
Transmission Control Protocol/Internet Protocol
TDD
Time Division Duplex
TDMA
Time Division Multiple Access
T1
TMS
Terminal-remote host protocol developed for
ARPAnet
Topology Management System
TX
Transmit
UBR
Unspecified Bit Rate
UDP
User Datagram Protocol
UNI
User-Network Interface
U-NII
Unlicensed National Information Infrastructure
UPS
Uninterruptible Power Supply
UTP
Unshielded Twisted Pair
VBR-RT
Variable Bit Rate-Real Time
VBR-NRT
Variable Bit Rate-Non-Real Time
VCC
Virtual Circuit Connection
VPC
Virtual Path Connection
VPI
Virtual Path Identifier
Telnet
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WAN
Wide Area Network
WLL
Wireless Local Loop
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