ARCell Planning and Installation Guide The ARCell License-Free Point-To-Multipoint Wireless Broadband Solution October 2003 © 2001-2003 Arcwave, Inc., 910 Campisi Way, Suite 1F, Campbell, CA 95008 USA Phone: 408-558-2300 www.arcwaveinc.
LIMITED WARRANTY. Arcwave warrants to Buyer at the time of delivery that the equipment will be free from defects in material and workmanship under normal use and service. Arcwave's sole obligation under these warranties is limited to replacing or repairing, at its option, at its factory, any equipment that is returned to Arcwave, transportation, duties, and taxes prepaid, within twelve (12) months after delivery.
Table of Contents Table of Contents......................................................................................................................... iii 1 2 3 4 5 Introduction ........................................................................................................................1-1 1.1 Subscriber Site ...........................................................................................................1-2 1.2 Hub Site.....................................................
5.9 6 Downtilt.....................................................................................................................5-24 Hub Installation Checklist – 6x60-degree...........................................................................6-1 6.1 ARCell Hub Outdoor Transceiver...............................................................................6-1 6.2 Outdoor Junction Box (OJB) – If Employed ...............................................................6-1 6.
13.3 14 Configure the TFTP Server ......................................................................................13-2 Cable System Basics ...................................................................................................14-1 14.1 Tuning ......................................................................................................................14-1 14.2 Ranging ..............................................................................................................
1 Introduction The Arcwave License-Free, Point-to-Multipoint Wireless Broadband Solution provides a complete end-to-end solution for Cable MSOs, Wireless ISPs and other fixed wireless operators seeking to expand their markets by offering wireless delivery of the Internet to their customers at performance levels that normally exceed DSL.
An ARCell Wireless System looking up a narrow canyon from one end may have only one ARCell Hub Transceiver. Cables are run from the Hub Transceiver(s) to the base station’s Wireless Cable Modem Termination System (W-CMTS) in the equipment room. The equipment room also has a Gateway to access the Internet, the transceiver power supply, etc. The ARCell AR3155 Subscriber Transceiver is mounted outdoors at the subscriber location with line of sight to the Hub Transceiver.
single power and signal cable is run between the Subscriber Transceiver and the modem location. See Figure 1-2. The Subscriber Transceiver is mounted on a chimney or a tripod similar to a TV antenna, or on a short pipe or bent-arm mounting arrangement similar to a small satellite TV dish, or a light duty non-penetrating flat roof mount. It must be in a position with line of sight to the Hub Transceiver location.
ARCell Hub Transceiver/ant Upstream Downstream DC Power Upconverter DOCSIS Wireless CMTS AC/DC Power Converter Network Management PC 100 Mbps Ethernet Sw All ac Base Station UPS ISP-Furnished Gateway & Router Backhaul to ISP Figure 1-3: Single-Sector Hub Configuration. The Hub Transceiver is aimed at the geographic area of the Subscriber Transceivers to be served.
6) DC power supply for the Hub Transceiver electronics 7) Uninterruptible Power Supply system (UPS) to protect all the equipment The ISP’s Internet access equipment is selected and configured according to the requirements of the particular ISP and the backhaul transmission equipment between the base station and the ISP’s facilities. The installer must provide an AC/DC power supply with sufficient capacity to operate the outdoor Hub Transceiver.
• Firmware residence and configuration utilities for the W-CMTS Base Station and Wireless cable modems. • TCP/IP services such as DHCP, TFTP and time server • SNMP network manager and W-CMTS- and WCM-specific interfaces. 1.2.7 Gateway This equipment provides functions required to interface the wireless network to the backhaul transmission facility to the ISP. The ISP will normally specify and configure this equipment.
o • The band 5.15 – 5.25 GHz is for indoor use, and is not used by ARCell. Upper band is 5.725-5.825 GHz Transmitted power in the band 5.725-5.825 GHz cannot exceed 1 Watt2. Transmitter Power o 1000 mW 50 mW Indoor only 5.15 5.25 250 mW FCC proposal May03 250 mW 5.35 5.47 Frequency (GHz) 5.725 5.825 Figure 1-4: Transmitter power limitations set by FCC. 1.4 Data Rates The downstream data path can be configured for one of two data rates within the 6 MHz CATV channelization: 1.
2 Subscriber Installation Detail Installation at the subscriber’s site is very simple – one small outdoor unit (the transceiver) and one cable modem indoors. Power for the outdoor unit is carried over the TV-type coaxial cable between the two units. Frequency of operation, RF power, etc. are all determined automatically. There are no settings to be made on site, with very few exceptions, which are discussed in this Section. ARCi Subscriber ODU TV cable (length between 50 & 200 ft.
Figure 2-2: Subscriber Transceiver pointing towards Hub. Mounting bracket (included) Elevation alignment bolt Pipe Tape F-connector after install Figure 2-3: Subscriber Transceiver mounted on pipe. 2.1.
• Dedicated modem signal meter (Sencore MSM980) • Spectrum analyzer (Anritsu MS2711B) • Channel-selectable cable-TV meter. They are described below. All devices measure the downstream signal level received from the base station. This provides an optimum alignment as the downstream receive antenna has a narrower beam width than does the upstream transmit antenna also housed in the Transceiver. By optimizing the downstream, the upstream is optimized automatically.
Figure 2-x: Photo of the AR100 Signal Strength Meter (SSM). Rx SSM LNB Figure 2-4: AR100 Signal Strength Meter (SSM) at transceiver. Complete the subscriber physical installation (at least the Subscriber Transceiver and power inserter). Connect the coax lead from the indoor power inserter to the SSM "RX" port and a short coax jumper from the SSM "LNB" port to the Transceiver. The SSM and the Transceiver will then be powered from the power inserter4.
2.1.4 Sencore MSM980 The Sencore MSM980 is a dedicated test device, which provides a number of tests and storage of results related to the installation and troubleshooting of subscriber units. One of its basic modes is to display in large numbers on its LCD screen the received signal level (from the Subscriber Transceiver) when connected to the Transceiver in lieu of (or in parallel with) the wireless cable modem. Connect the Sencore meter to the coaxial cable from the Subscriber Transceiver.
Table 2-1: Typical spectrum analyzer settings. Parameter Setting Center Frequency IF frequency in use (481 – 571 MHz) Span 50 MHz RBW 1 MHz VBW 30 kHz Vertical Scale linear, 10 dB / division Reference Level +40 dBmV Attenuation 20 dB Detection Mode Averaging Align the subscriber Transceiver antenna as described above, adjusting for maximum signal amplitude. 2.2 Cable Connection and Grounding Attach the single RG-6 coaxial cable to the F connector on the rear of the Subscriber Transceiver.
To ARCell ODU (AR3155) Grounding device Ground wire (green or bare) To cable modem Figure 2-4: Typical grounding device at subscriber premises. 2.3 DC Power Supply The Transceiver is powered over the coaxial cable via a Power Inserter (Figure 2-5) provided with the Transceiver. Inside the building, route the RG-6 from the building entrance point to the wireless cable modem location. Install an F connector on the cable.
To AC power To modem (no DC) To AR3155 (with DC) to to modem antenna DC power being inserted Figure 2-5: Power Inserter and AC/DC converter. 2.4 Wireless Cable Modem Place the wireless cable modem where it will be used and attach the short cable on the power inserter (labeled “To Modem” in Figure 2-5) to the F connector on the rear of the modem. Connect the (separate) modem wall-mounted power supply (included with the wireless cable modem) to the power connector on the rear of the modem.
The WCM, when it is first powered up or when it has lost the downstream signal, will “step” through the standard EIA channel list looking for the downstream signal. Alternatively, the WCM may be optioned through its administrator interface to lock onto a specific downstream frequency. Modem rear panel Modem power Power inserter Ethernet (LAN) cable Power inserter power cord Cable to AR3155 Figure 2-6: Rear view of typical wireless cable modem. 2.
• USB: ON = connected [some modems have both USB & LAN connectors] • Activity: blinking = data (transmit or receive) The browser interface is available on some modems and contains more information. To reach it, follow these steps: • Connect a PC to either the modem’s USB or the Ethernet interface • Launch the PC’s browser, such as Microsoft’s Internet Explorer • Address: http://192.168.100.1 • User: (leave this blank) • Password: cable The screen looks like Figure 2-7.
3 Hub Installation Detail – Omni + 4x90 One popular design for the Hub is to transmit from an omnidirectional antenna, as in Figure 3-1, and receive in 90-degree sectors. The transmit traffic capacity is 20 Mbps, and each of the receive traffic capacities is 5 Mbps, so the total receive capacity is equal to the transmit capacity, i.e., 20 Mbps. Figure 3-1: Omnidirectional transmitter and antenna. The system diagram is shown in Figure 3-2.
AR2205-2 AR1205 Figure 3-2: System diagram. 3.1 Installation Detail – AR2250 Transmitter/Antenna The Transmitter and Antenna are two units joined with a short coaxial cable. They are normally mounted on the same pipe. 3.1.1 Pole Mount The omnidirectional antenna is mounted at the top of a 1.25 to 2.0-inch Outside Diameter (OD) pipe, so that it radiates unobstructed in a full 360 degree circle. The antenna is inside a cylindrical “plastic” PVC radome.
UV-rated coax and power cable should be used outdoors, and UV-, plenum- or Riser-rated cable can be used indoors. In some buildings, a Plenum-rated cable is required. Consult the local codes. The ground wire should be #6AWG copper connecting the pipe and Transmitter housing to building ground. Follow the local code requirements. A surge suppressor6 is needed at the building entrance or in the equipment room; the location depends upon local code.
The DC power takes a wire pair to the Outdoor Junction Box (OJB), and thence to each of the Transceivers. The negative lead is grounded in the equipment room, inside the OJB and inside the Transceiver. Examples of voltage-drop calculations: 1. The standard cable shipped with the Transmitter is 25 feet of #18 AWG shielded twisted pair annealed copper wire (Belden 3124A), which will have a 0.1 Volt drop at 600 mA.
Spectrum Analyzer Ref Level : 40 40.0 dBmV 30 dB / Div : 20 10.0 dB 10 NEW GAIN 30DB dBmV 0 -10 -20 -30 -40 -50 460 CF: 511.0 MHz RBW: 1 MHz Date: 09/19/2002 Model: MS2711A 470 480 530 520 510 500 490 Frequency (461.0 - 561.0 MHz) SPAN: 100.0 MHz VBW: 30 kHz Time: 11:04:17 Serial #: 00115024 540 550 560 Attenuation: 20 dB Detection: Average Figure 3-5: Spectrum at the input to the Hub Transmitter for properly driven IF.
Mounting bracket (top & bottom) Ground lug Figure 3-6: Cable installation and dressing with weather cap installed. Ground lead lug installed Pipe clamps installed Figure 3-7: Hub Receiver Bracket Close-up Details 3.2.
• Ground wire As with the Transmitter, Arcwave recommends quad-shielded RG-6 coaxial cable (Belden 1189) and twisted pair of a suitable gauge wire. When the equipment room is a short distance from the transmitter and receiver installation, the simplest cabling is to install separate cables for each unit, i.e., 5 coaxial cables, 5 power cables and 1 ground wire. The AR1205 Receiver must be powered from 8.0 to 8.5 Vdc at the Receiver connector. The Receiver typically consumes 275-350 mA.
2. b. EuroDOCSIS 1.0-qualified, c. DOCSIS 1.1-compatible, d. EuroDOCSIS 1.1-compatible, e. PacketCable 1.0-compatible NETWORK MANAGEMENT AND PROVISIONING a. 3. 4. 5. Cisco-compatible CLI b. SNMP v1 and v3 c. Standard DOCSIS and IETF MIBs d. Motorola MIBs e. LDAP v3 f. Open Interfaces to Provisioning, Accounting and Billing Applications g. HTTP/Java/XML Integration h. DHCP Relay i. Multiple Levels of Account/Password j. Authentication k. Telnet with Security Extensions l.
3.3.1 Default Configuration 3.3.2 Server Software This is discussed in other Sections of this manual. The server software is pre-loaded at the factory. 3.4 Network Management For a multi-sector Hub with dozens of subscribers, the alarming and other features in the Arcwave Network Management is really key to operating a successful system.
ARCell Default Addresses for Vyyo NMS (Windows) Server 10.10.10.201 WMTS 10.10.10.202 LAN Subnet mask 255.255.255.0 Available DHCP Addresses 10.10.10.x ARCell Default Addresses for BSR1000W NMS (Windows) Server 10.10.10.201 BSR1000W #1 10.10.10.203 BSR1000W #n 10.10.10.20(n+2) LAN Subnet mask 255.255.255.0 BSR cable IP address 192.168.2.1 Available DHCP Addresses (Internal to BSR) W-CMTS Figure 3-9: Network Diagram 3.5.
1. Highlight “Server Options” and Click “Action” > “Configure Options”. 2. In the “General Tab”, check the following and enter the specified value a. 002 Time Offset – Input: 0 b. 003 Router – Input: Enter router’s IP address or NMS’ IP address (Require by Vyyo Modem) c. 004 Time Server – Input: NMS’ IP address (e.g. 10.10.10.201) d. 006 DNS Server –Enter the IP address of the DNS server (e.g. router or NMS) e. 007 Log Server – Input: NMS’ IP address (e.g. 10.10.10.201) f.
Be sure the “003 Router” and “006 DNS Server” options are set correctly with the Internet router’s IP address. In this example both Router and DNS server options are set to 10.10.10.203. 3.5.2 Network Testing for Vyyo system The easiest way to test whether your NMS Server’s DHCP server options are configured correctly is to connect a computer (MAC, PC, or Laptop) to the Ethernet switch. Be sure that the user’s PC is set to obtain its networking settings using DHCP.
“Obtain an IP address automatically” and “Obtain DNS server address automatically” must be checked as shown below.
If you are using Windows 95/98 you may need to reset the computer after making any network changes. If you are using Windows 2000/XP, you can check to see if the system obtained an IP address by opening a DOS prompt and typing ”ipconfig /all” [NOTE: the space after “ipconfig” is necessary]. The system should have IP address in the range specified by the DHCP server, something in the range of 10.10.10.x for this example.
4 Antenna and Frequency Planning This Section describes some of the issues involved in planning a wireless network deployment. The ARCell wireless system uses different frequencies for Downstream (Hub to subscriber) and Upstream (subscriber to Hub) communications, which is referred to as a Frequency Division Duplex system. The Downstream uses a channel within the UNII “high” band, 5.725-5.825 GHz. Upstream uses a channel within the UNII “low” band, 5.250-5.350 GHz. 4.
Table 4-1: Downstream Frequency Plan June 2003 WCMTS Down or Upconverter Output Transceiver Radiated Modem IF Input Center freq. Center freq. Center freq.
5306.4 <> 5348.0 & 5293.6 <> 5252.0 5312.8 & 5287.2 U/S AIR ARCell Subscriber Transceiver 5729 <> 5819 5777 D/S AIR 6.4 <> 48.0 12.8 U/S IF 6.4 <> 48.0 12.8 U/S IF 481 <> 571 529 D/S IF 429 <> 519 477 D/S IF LAN Data 44 44 Upconverter Modem Laptop computer Downstream (Tx) W-CMTS Upstream 1 (rcv) All Frequencies are channel center in MHz Figure 4-1: Frequency Plan. Figure 4-1 illustrates the range of frequencies and an example of one configuration of up and down conversions.
4.2.2 Downstream Adjacent 90-degree Sectors The 90-degree-Sector Transceiver has a half-power horizontal beam width of 90 degrees, i.e., 45 degrees each side of center. But, the energy of the antenna does not simply cut off at 45 degrees in horizontal pattern from the centerline of the antenna. Rather, the energy falls off as the angle from the centerline increases.
W-CMTS Upconverter freq-B 2-way splitter Downstream 1 2-way splitter Upconverter freq-A Trans/Ant 1 2-way splitter illustrates a four-sector system that utilizes the ABAB frequency pattern and one downstream logical channel, which is split ultimately to all four sectors. This system has an aggregate raw downstream capacity of 10 Mbps, when utilizing QPSK modulation, and 20 Mbps when using 16-QAM modulation.
Downstream 2 10 Mbps W-CMTS Upconverter freq-B 2-way splitter Upconverter freq-A Trans/Ant 1 2-way splitter Downstream 1 10 Mbps Trans/Ant 2 Trans/Ant 3 Trans/Ant 4 Figure 4-4: Four-sector ABAB system with dual downstream data stream, total 20 Mbps. 4.3 Frequency Planning – Upstream This Section discusses several issues related to planning the use of the frequency band for Upstream communications. 4.3.
Hub Rcv/Ant #2 Hub Rcv/Ant #3 Hub Rcv/Ant #4 Freq X Freq Y Freq X Freq Y upstream inputs Hub Rcv/Ant #1 W-CMTS Figure 4-5: Four Hub Transceivers as input to W-CMTS. 4.3.3 Available Frequencies All wireless modems in the same Hub sector must transmit upstream on the same frequency, and each wireless modem can operate on only one upstream channel. There are 3 upstream frequencies. The Upstream data rate is 5.12 Mbps with Channel Bandwidth of 3.2 MHz. See Table 4-2.
Table 4-2: ARCell Upstream Frequency Plan7 Modem Tx & W-CMTS Rx Input RF Upstream center (MHz) center (MHz) 6.4 5306.4 AR1205-064H 9.6 5309.6 AR1205-096H 12.8 5312.8 AR1205-128H 6.4 5293.6 AR1205-064L 9.6 5290.4 AR1205-096L Standard 12.8 5287.2 AR1205-128L Standard Model # (90 deg Rcv) Product Status NOTE: the 9.6 & 12.8MHz frequencies are supported by both the V3000W and the BSR1000W Wireless CMTS Hub controllers. The other frequency (6.4MHz) is not supported by the BSR1000W.
5 Hub Installation Detail – 6x60 This Section will describe a six-sector Hub using 60-degree AR1255 Hub Transceivers. These Transceivers contain the transmitter, receiver and both Tx & Rx antennas in a single integrated outdoor unit. This Section also describes a system using the V3000 W-CMTS, which is a chassis-based CMTS. This chassis has six card slots for upstream & downstream cards. The Downstream card is a single port. The upstream card provides 6 upstream ports.
secure with a tie-wrap below the lower electronics module. Although the power connectors are interchangeable, the method illustrated in the photograph will produce best results. It is not necessary to disturb the SMA coaxial connector on the top of each electronics module. This is the connection to the actual antenna panel.
Upstream Receiver module (AR1255RXSP) Downstream Transmit module (AR1255TXSP-2) Figure 5-2: Cable Installation and Dressing. Rear weather cover Figure 5-3: Weather cap installed.
Ground lead lug installed Pipe clamps installed Figure 5-4: Hub Transceiver Bracket Detail Bundle the three cables (2 x RG-6, power) with suitable (UV rated) tie wraps and secure to the mounting structure in a manner to prevent rainwater from flowing down the cable and into the cable access opening in the rear weather cap. Figure 5-5 illustrates a typical installation. Be certain to provide a drip loop if the cable bundle is routed upward.
Cable entry Figure 5-5: Hub Transceiver Cable Installation 5.2 Installation Detail – Outdoor Junction Box (OJB) A multi-sector configuration consists of two or more Hub Transceivers mounted on a common building roof or tower/monopole structure served by a single Wireless CMTS (W-CMTS) located in an adjacent equipment room. Each Hub Transceiver requires a separate upstream and downstream IF cable, so a six sector (six Hub Transceiver) installation would require 12 IF coaxial cables.
Figure 5-6: Photo of open OJB. The upper barrier strip terminates the shielded/outdoor CAT 5 cable (black jacket). This is reserved for the future applications.
