The incoming ground & DC- cable is attached to the bottom of the ground block along with ground leads to the negative bus on the fuse block and the enclosure’s ground lug. The incoming DC+ cable is attached to the bottom of the DC+ bus on the fuse block. Cables to the individual Hub antennas (light gray) terminate on the right side of the fuse block.
Fuse Block Blue Sea Systems 5015 West Marine Retail Ground Bus Blue Sea Systems 2301 West Marine Retail www.bluesea.com Dual Bus (use in lieu of fuse block) Blue Sea Systems 2702 Rubber Insert ¾” couplings, locknuts, bushings West Marine Retail Electric Supply Trade Shielded Cat 5 Cable Superior Essex BBDN Part #04-001-34 Graybar Electric Cat 5 Shield Bond Connectors Graybar Electric 5.
Figure 5-9: Connection diagram of indoor equipment. 5.3.1 June 2003 Grounding and Lightning Protection Proper grounding is critical to the safety, performance and the life of the equipment installed at the base station. Refer to Figure 5-9. Arcwave recommends that the installer follow the general grounding practices employed in cellular and PCS base station sites. Arcwave recommends the following Lightning Protectors from PolyPhaser Corp. (www.polyphaser.com).
Table 5-1 – Lightning Protector Part Numbers Ref # Item Part # 1 75 ohm RG-6 transmit and receive cable IS-75F-C1 2 DC Power Supply IS-17VDC-30A-NG The ground bus, in turn, should be connected with an appropriate conductor (minimum #6 AWG) to the hub site ground that includes the power service and building common ground, per the NEC and local codes.
Lightning protectors for ARCell IF cables ARCell IF cables (3 downstream + 6 Upstream) Figure 5-11: Details of Fig 5-10 IF cable protection. 5.3.2 DC Power The Hub Transceiver requires 8.0 – 8.5 Vdc at the transceiver modules and draws approximately 900 mA of current. In a one or two sector installation a small variable voltage linear DC power supply capable of supplying at least 1000 mA is employed.
The upconverter is adjusted to provide the downstream Intermediate Frequency (IF) signal at the center frequency appropriate for the transmit module within the Hub Transceiver to create the desired RF carrier frequency. See Table in the Antenna and Frequency Planning section of this manual for more information. The output of the upconverter is connected with RG-6 cables through a 12 dB tap, and thence through the lightning protector to the cable to the Hub Transceiver.
Figure 5-12: Splitter, Tap and Pad. 5.3.5 Receive (Upstream) Signal Path The upstream signal IF signal from the Hub Transceiver is connected through the lightning protector and through the 12 dB tap to the upstream port of the W-CMTS. The Table in the Antenna and Frequency Planning section of this manual details the frequencies that are available.
• The Ethernet switch port to which the V3000W W-CMTS is connected must be optioned to 100 Mbps, Full Duplex, No Auto-Negotiate. 5.4.3.1 Upconverter (Internal or external) • 75 ohm type F female connectors • Input signal frequency 44 MHz; level range +38 dBmV to +45 dBmV. • Output signal frequency 477 through 577 MHz; maximum signal level +60 dBmV. 5.5 System Level-Setting Notes 5.5.
IMPORTANT NOTE: To comply with FCC RF safe-human-exposure compliance requirements, antenna installation and device operating configuration described in this user manual must be satisfied. The transceiver(s) used for this device must be fixed-mounted on outdoor permanent structures with a separation of at least 1.5 meters from all persons during normal operation. 5.5.4 Upstream Power The output level of the wireless cable modem (WCM) establishes the subscriber transceiver’s output power.
5.6 Installation Tuning 5.6.1 Downstream The following diagrams showing the effects of overdriving the AR3155Hub Transceiver are for illustrative purposes only and should not be used as a guide for setting the RF power output level. If the AR3155 RF power is set as described in Section 5.5.3 (above), transmitter linearity will be maintained for proper operation in QPSK and 16QAM downstream modes.
configuration options of the wireless cable modems is to search the CATV frequency plan looking for a valid downstream signal. Figures 5-14 and 5-15 illustrate the effect of overdriving the Hub Transceiver. Both of these traces were captured in the identical setup as Figure 5-13. The drive to the Hub Transmitter was increased to create the distortion. Spectrum Analyzer Ref Level : 40.0 dBmV 30 20 dB / Div : 10.
Spectrum Analyzer Ref Level : 40.0 dBmV Heavily overdriven transmitter 30 20 dB / Div : 10.0 OVR DRVN 40 dB 10 dBmV 0 -10 -20 -30 -40 -50 435 CF: 459.0 MHz RBW: 1 MHz Date: 05/23/2002 Model: MS2711B 440 445 480 485 470 465 460 455 450 Frequency (434.0 - 484.0 MHz) 475 SPAN: 50.0 MHz VBW: 30 kHz Time: 11:52:40 Serial #: 00215050 Attenuation: 0 dB Detection: Average Figure 5-15: Example of heavily overdriven transmitter, at input to cable modem.
5.6.2 Upstream The wireless cable modem (WCM) transmits an upstream signal (to the Hub Transceiver) under timing, power and frequency control of the W-CMTS. The W-CMTS can command the WCM to transmit its IF signal at an output level between 8 dBmV and 58 dBmV (inclusive), based on the signal the W-CMTS considers optimum for accurate demodulation. These parameters are established at the time a WCM is powered up, locates a valid downstream signal, and seeks to be recognized by the W-CMTS.
The trace was in Figure 5-17 captured at the 12 dB tap on the upstream input to the W-CMTS. It is centered on upstream frequency 6.4 MHz and built up with Max Hold for 30 seconds. Note that the bursts from the various WCMs are arriving at nearly the same amplitude. [Disregard signal below 4 MHz as noise, etc.]. Spectrum Analyzer 30 SECS Ref Level : 10.0 dBmV M1: -42.55 dBmV @ 11.4 MHz 0 -10 dB / Div : 10.0 10 dB -20 dBmV -30 -40 -50 -60 -70 -80 M1 2 3 4 CF: 6.
The documentation should include a single-line diagram (such as Figure 5-9) including every component of the base station installation. Labels on the diagram(s) should correspond exactly to the physical labels on the actual equipment (above). A portable spectrum analyzer capable of viewing frequencies to 1 GHz is an invaluable tool for system maintenance and troubleshooting.
Note in this particular example the “shoulders” on the trace caused by the upconverter being overdriven. The shoulders were eliminated by reducing the signal to the upconverter. This was done by increasing the value of the attenuator between the W-CMTS and the upconverter. If overdriving occurs when the upconverter is internal to the W-CMTS, the shoulders can be eliminated by reducing the Downstream output power. The final Hub documentation package should include the trace after the adjustment. 5.7.
Figure 5-20 shows a quiet sector – no modems bursting on the 6.4 MHz IF upstream. The solitary burst is on an adjacent sector centered at 9.6 MHz. This is evident as the modulation envelopes of the ARCell upstream signal are 3.2 MHz wide. Thus the 6.4 MHz-centered upstream has energy between 4.8 and 8 MHz. The solitary burst is greater than 8 MHz so it is part of an upstream signal centered at 9.6 MHz with energy between 8 and 11.2 MHz. In this system a physically adjacent sector is operating with a 9.
The power cable connector is Switchcraft EN3C6F, which is a female connector. The connector on the Transceiver is male. Table 5-3: Cable wiring. 5.8.1 Pin Signal Belden 8762 1 DC Return (ground) Black 2 +DC (+8.
Generally, the situations that merit considering downtilt are when the Hub is several hundred feet higher than the subscribers’ transceivers.
6 Hub Installation Checklist – 6x60-degree The Arcwave’s AR1255 Hub Outdoor Transceiver is intended for professional installation only. Nothing is this manual supercedes local regulations. 6.1 ARCell Hub Outdoor Transceiver 1. Attach IF cables (upstream and downstream) to receiver and transmitter 2. Attach DC power cable to receiver and transmitter. 3. Dress power and IF cables with UV-rated tie wraps and pass them through the cable grommet at bottom of rear weather cap. 4.
3. Ground the Negative side of the Hub Transceiver DC cable to the OJB common ground bus. 4. Ground the shields of all DC and IF cables to the OJB common ground bus. 5. If there is any doubt about the continuity of structural ground between the OJB grounding point and the equipment room electrode, run a properly terminated (minimum) #6 copper cable from the OJB common ground bus to the ground bus bar in the equipment room. 6.
6.5 Equipment Room Installation – Inside Equipment 1. Customer to furnish cabinet or open-frame 19” equipment rack. a. Cabinet racks to be secured to floor per local earthquake standards. Open frame racks must be secured and braced at the top as required by local codes and practice. b. Minimum recommended clearances for equipment access and operation: 24” in the rear and 36” in the front for cabinet racks, proportionally greater for open frame racks. c.
6. All up converters (CADCO's) to be labeled: “511 MHz – Sectors 1,3,5” 7. A key to sector number and approximate compass direction is to be posted: “Sector 1 – N, Sector 2 – NE, etc.” 8. A complete single line diagram is to be furnished showing every component of the base station, including equipment, power cables, signal cables and grounding. Labels on the diagram must match exactly the physical labels on the actual equipment and cabling. 9.
7 Link Budget Parameters for 6x60 Hub The following numbers are for a system with Vyyo wireless cable modems at the customer site and the V3000W W-CMTS at the Hub. The six sectors involve upconverters and other devices. Path Loss is primarily free space path loss in the 5 GHz band. Free Space Path Loss (dB@5 GHz) = 112 + 20*log(miles). Loss (dB) 130.0 120.0 110.0 7.25 6.25 5.25 4.25 3.25 2.25 1.25 0.25 100.0 Distance (Miles) Figure 7-1: Free Space Path Loss at 5 GHz band.
Table 7-1: Upstream Link Power Budget Minimum CPE WCM output (dBmV) Typical +8 IF coax cable loss Maximum +58 Belden 9116 1.60 dB/100 ft @ 55 MHz Calculate CPE IF input (dBmV) +18 +58 CPE RF output (dBm) -30 +10 CPE Tx Antenna gain (dBi) +14 Path Loss (dB) Calculate Hub Receive Antenna gain (dBi) Hub RF input level (dBm) Hub RF output level 16 -95 -85 -42 dBm +6 dBmV -32 dBm +16 dBmV 53 dB gain Calculate Belden 1189A 1.
Table 7-2: Downstream Link Power Budget Minimum Typical Maximum CPE WCM output (dBmV) +20 +40 CADCO Upconverter Input (dBmV) +38 +45 CADCO Upconverter Output (dBmV) +40 +45 IF coax cable loss (dB) Calculate Hub Tx IF input (dBmV) +35 Hub Tx RF output (dBm) +17 Hub Tx Antenna gain (dBi) +13 Path Loss (dB) CPE Rx output level June 2003 +15 Belden 1189A 4.
8 Wireless Cable Modem Configuration – CXC150W This Section will describe the DOCSIS parameters that are needed for the wireless cable modem configuration (CM) file. Any standard DOCSIS CM file generator or editor may be used as long as the minimum parameters are settable. This Section will show how to create a CM file using the Tality Cable Modem File Generator that is valid for use with any DOCSIS compliant modem with the BSR1000W. Button Placement 8.1.
8.1.3 Set the Downstream Frequency (optional, but recommended) By setting the downstream frequency received by the modem from the ARCell Transceiver, modems will correctly center its downstream frequency. If this is not set, the modem may be slightly off frequency resulting in poor performance. Select the Downstream Frequency button and enter the center downstream frequency in Hertz, then click Save. 8.1.
8.1.5 Specify the Maximum Number of CPEs behind the modem (required). The maximum number of network devices (e.g. computers) that the modem will allow must be specified. Click on the MAX CPE button and enter the upstream ID that you want the modem to be on. Click Save. 8.1.6 Class of Service and Baseline Privacy (optional) Click on the Class of Service button and the required parameters (all of them) click Save.
click Save. Recommended Parameter Values • Auth Wait Timeout = 10 • Re-auth Wait Timeout = 10 • Auth Grace Time = 300 • Oper. Wait Timeout = 10 • Re-key Wait Timeout = 10 • TEK Grace Time = 60 • Auth. Rej. Wait Timeout = 60 8.1.
9 W-CMTS BSR1000W Setup Guide The purpose of this Section is to assist in setting up the BSR1000W W-CMTS. It outlines the required steps need to bring up the CMTS. Advanced features of the CMTS will not be discussed. For more detailed description, refer to the manual that came with the CMTS. 9.1 Factory Settings BSR1000W This Section describes how the BSR1000W is shipped from Arcwave. It has a single Downstream set to 511 MHz, and single Upstream set to 9.6 MHz. Instructions on changing settings follows.
• Flow Control: None 2. Connect the BSR1000 to the PC using a NULL MODEM CABLE 3. Power on the BSR1000 (DO NOT INTERRUPT THE BOOT PROCESS). 9.3 Setting the System Passwords 4. Once the boot process is complete, press the ‘ENTER’ key and the prompt ‘RDN>’ (or similar) should appear. 5. In order to view/make system changes, you must enter Privileged EXEC mode. This mode is entered using the ‘enable’ command. Afterwards the system will prompt for a password.
9.5 Configure Cable IP Address 13. Enter the Interface Configuration mode for the cable interface by entering ‘interface cable’ command in Global Configuration mode. • RDN (config)# interface cable 0/0 • RDN (config-if)# 14. Enter the cable IP address and subnet mask by using the ‘ip-address’ command. • RDN(config-if) # ip address 192.168.2.1 255.255.255.0 (ARCWAVE preconfigured standard). 15. Activate the cable interface using the following command • RDN(config-if) # no shutdown 9.
21. Finally enable the downstream by using the following command: • RDN(config-if) #no cable downstream 0 shutdown 9.8 Configure Upstream Ports: 22. Set the upstream center frequency for the upstream port by using the ‘cable upstream frequency’ command • RDN(config-if)# cable upstream ‘port number <0-3>’ frequency <500000042000000> • Example: RDN(config-if)# cable upstream 0 frequency 9600000 23. Set the upstream channel width to 3.2Mhz.
9.11 Creating a static route from the server to the BSR1000 A static route must be set on all servers on the network that will communicate to the cable interface (e.g. modems) of the BSR1000. 29. Windows 2000 Server: At DOS command prompt • Route add mask -p • Example: route add 192.168.2.0 mask 255.255.255.0 10.10.10.203 –p • 10.10.10.
10 Windows 2000 DHCP Server This Section is written for both the Motorola BSR1000W and for the Vyyo V3000 wireless CMTSs. Most of the text is for a Motorola BSR1000 system. With the exception of the IP Addressing scheme, all other DHCP parameters values are valid for a Vyyo WMTS. Pay particular attention to any bold captions under screenshots for changes for Vyyo systems. Requirements: - Windows 2000 Server with DHCP installed 10.1 Setup Procedures 1. In the “Administrative Tools”, open DHCP. 2.
*Arcwave standard addresses for the Vyyo is 10.10.10.1 – 10.10.10.254 b. Add Exclusions – Specify address that you do not want DHCP to issue. You must exclude the W-CMTS’ cable IP address. *Exclude the WMTS and NMS IP Address for Vyyo systems c.
4. Configure DHCP options – Select “No” and click “Next”. 5. Activate Scope by highlighting the scope and click the button. 10.2 Configuring Server Options 6. Highlight “Server Options” and Click “Action” → “Configure Options”.
7. In the “General Tab” , check the following and enter the specified value a. 003 Router – Input: Enter router’s IP address (cable IP address) or Gateway for Vyyo systems. b. 004 Time Server – Input: NMS’ IP address c. 006 DNS Server –Enter the IP address of the DNS server (e.g. router or NMS) d. 066 Boot Server Host Name - Input: NMS’ network ID (name). OPTIONAL (DO NOT include if you are going to register modems. See below for more details) e.
10. Enter a required information, and click “Add” when finished *Reservations for Vyyo Systems will have an IP address of 10.10.10.x 11. Your window should look similar to this: *Reservations for Vyyo Systems will have an IP address of 10.10.10.
12. You must specify a bootfile for the registered modem to download. a. Go the “Reservations” and highlight the reservation you wish to configure. *Reservations for Motorola systems will have an IP address of 192.168.2.x b. Click c. on the tool bar. In the “General” tab, check “067 Bootfile Name” and specify the new boot file. Note: To prevent unauthorized modem into the network, remove option “067 Bootfile Name” from the “Server Options” in step 2 (this is NOT the same as “Reservation Options”).
10.4 Restricting Addresses It’s best to restrict a pool of addresses just for modems. In the “Address Pool” click to add a restriction. Any unrestricted addresses will be used for other clients (e.g. computers, routers) on the network. This only needs to be set once. 10.5 Viewing Leases If you wish to view the IP Addresses that have been leased, click on “Address Leases” under the Scope.
11 Time-of-Day Server Setup Guide The purpose of this Section is to review installing the TimeSync (RFC 86816) server for Arcwave systems. TimeSync will install on any Windows 2000/NT operating system and provide the time-of-day server required by DOCSIS. 11.1 Install TimeSync 1. Go to ARCELL / Servers directory, then to Timesync 2. Locate and run Install 11.2 Configure TimeSync 3. Execute which can be found in the Windows Control Panel. 4.
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12 BSR1000W SNMPc View and Community The SNMP control function is located in the privilege exec mode of the CLI. In order to provision community names and access privileges such as Read Only, Read/Write, or Trap a view will need to be created. From the RDN# prompt type snmp view, followed by the name (view) to be created and the following OID value 1.3.6 this is the location of where in the MIB OID that you will begin management. Follow that with inc or exc to included or exclude privileges.
13 SolarWinds’ TFTP-Server The SolarWinds’ TFTP Server allows initializing modems to download a cable modem file (cm file) to complete its registration process. This particular TFTP-Server will run on any Windows 2000/NT/XP operating system. All files/folders referred to in this document can be found either on the CD-ROM provided by ARCWAVE or in C:\ARCELL\ 13.1 Installing the server 1. Execute Install located in Servers \ TFTP 1.1. Accept Registry changes.
6. Click OK when finished 7. Check for proper operation by stopping the service, the restarting it. This can be done by right-clicking on . If properly configured the TFTP-Server window will come up. 13.3 Configure the TFTP Server 8. Open the TFTP Server Configuration by going to File → Configure 9. Select the TFTP Root Directory. This is the directory that contains the CM files the modem will download. (Various ARCWAVE standards: \ARCi\MIC, \ARCELL\cmfiles) June 2003 Page 13-2
10. Go the Security tab and select Transmit and Receive files (for security reasons you my elect to select ‘Transmit Only’). 11. Click OK to finish.
14 Cable System Basics This Section reviews the basic system operation between the CMTS and the Cable Modem. A hybrid fiber coax cable system looks like Figure 14-1.
Note that DOCSIS permits multiple Upstream channels to work with a single Downstream channel. 14.2 Ranging The CMTS is not aware that a new cable modem has entered the system until it receives an initial RF burst from the modem. As the CMTS receives this RF burst, it commands the modem to increase or decrease its transmitter power. The CMTS’ receiver operates best when all the cable modems RF is received at the same power level. The CMTS assigns the modem an initial time slot. 14.
15 Reader Feedback Readers of this Manual are encouraged to forward their corrections and comments to: Customer Service Arcwave, Inc. 910 Campisi Way, #1F Campbell, CA 95008 408-558-2763 (direct) Email: RMelzig@arcwaveinc.
