Current Technologies 6030A CURRENT Gateway-Bridge OH 6030 User Manual

Current Technologies, LLC CURRENT Gateway-Bridge OH 6030

Contents

Notching Instructions

Network Element Notching Instructions
CURRENT Group, LLC Network Element Notching Instructions February 29, 2008 2 1. Notching Overview In order to comply with FCC requirements on mitigation and avoidance measures it is necessary for the administrator to be able to track the notching on any CURRENT Group unit. Depending on the results, the administrator may need to modify the notching settings. Notching scripts reside on the NEC server in the CURRENT Group BPL system. The administrator is able to access and run these scripts by logging in to the NEC server. The administrator then enters the appropriate command to run the pertinent script. The scripts are described in further detail below. 1.1 Get Notching Settings The administrator logs into the NEC server and follows the steps listed below to obtain the notch settings for a particular CURRENT Group unit. The administrator will need the following parameters in order to run the script: -s <sn> = serial number of the unit. This is used to calculate the SNMP pass phrase. -i <ip> = IP address of the unit from which you want the current settings. 1. At the Unix command line enter: get_notching –s <sn> -I <ip> The executed script will return the notching values currently set on the selected unit. The output is displayed as a list of 84 characters, and whether or not the carrier is currently enabled, where 1 = enabled, and 0 = disabled. 1.2 Set Notching Settings The administrator logs into the NEC server and follows the steps listed below to set the notching settings for a particular CURRENT Group unit. The administrator will need the following parameters in order to run the script: -s <sn> = serial number of the unit. This is used to calculate the SNMP pass phrase. -i <ip> = IP address of the unit to be modified. -C <notchedcarriers> = comma separated list of carriers. Carriers are listed as 1 through 84. 1. At the Unix command line enter: set_notching –s <sn> -i <ip> -C <comma separated list of carriers to disable> The executed script will set all carriers to be enabled except for the HAM band and any other carriers specified. If this script is run without specifying any carriers, then the notching is set to the default setting with only the HAM band set to be disabled.
CURRENT Group, LLC Network Element Notching Instructions February 29, 2008 3 1.3 Calculating The Carrier to Notch The correspondence between carrier number and carrier frequency is shown for both the low voltage and medium voltage domains in the table below. Carrier Number Low Voltage Center Frequency (MHz) Medium Voltage Center Frequency (MHz) 1 4.4922 47.7656 2 4.6875 47.5703 3 4.8828 47.3750 4 5.0781 47.1797 5 5.2734 46.9844 6 5.4688 46.7891 7 5.6641 46.5937 8 5.8594 46.3984 9 6.0547 46.2031 10 6.2500 46.0078 11 6.4453 45.8125 12 6.6406 45.6172 13 6.8359 45.4219 14 7.0313 45.2266 15 7.2266 45.0312 16 7.4219 44.8359 17 7.6172 44.6406 18 7.8125 44.4453 19 8.0078 44.2500 20 8.2031 44.0547 21 8.3984 43.8594 22 8.5938 43.6641 23 8.7891 43.4687 24 8.9844 43.2734 25 9.1797 43.0781 26 9.3750 42.8828 27 9.5703 42.6875 28 9.7656 42.4922 29 9.9609 42.2969 30 10.1563 42.1016 31 10.3516 41.9062 32 10.5469 41.7109 33 10.7422 41.5156 34 10.9375 41.3203 35 11.1381 41.1197 36 11.3281 40.9297 37 11.5234 40.7344 38 11.7188 40.5391 39 11.9141 40.3437 40 12.1094 40.1484 41 12.3047 39.9531 42 12.5000 39.7578 Continued Æ
CURRENT Group, LLC Network Element Notching Instructions February 29, 2008 4 Carrier Number Low Voltage Center Frequency (MHz) Medium Voltage Center Frequency (MHz) 43 12.6953 39.5625 44 12.8906 39.3672 45 13.0859 39.1719 46 13.2813 38.9766 47 13.4766 38.7812 48 13.6719 38.5859 49 13.8672 38.3906 50 14.0625 38.1953 51 14.2578 38.0000 52 14.4531 37.8047 53 14.6844 37.5734 54 14.8438 37.4141 55 15.0391 37.2187 56 15.2344 37.0234 57 15.4297 36.8281 58 15.6250 36.6328 59 15.8203 36.4375 60 16.0156 36.2422 61 16.2109 36.0469 62 16.4063 35.8516 63 16.6016 35.6562 64 16.7969 35.4609 65 16.9922 35.2656 66 17.1875 35.0703 67 17.3828 34.8750 68 17.5781 34.6797 69 17.7734 34.4844 70 17.9688 34.2891 71 18.1641 34.0937 72 18.3594 33.8984 73 18.5547 33.7031 74 18.7500 33.5078 75 18.9453 33.3125 76 19.1406 33.1172 77 19.3359 32.9219 78 19.5313 32.7266 79 19.7266 32.5312 80 19.9219 32.3359 81 20.1172 32.1406 82 20.3125 31.9453 83 20.5078 31.7500 84 20.7031 31.5547
CURRENT Group, LLC Network Element Notching Instructions February 29, 2008 5 1.4 Calculating Notching Depth To create the appropriate notching depth, it may be necessary to notch more than one carrier. To create a notch >10 dB deep, only a single carrier need be notched. To create a notch >20 dB deep, it is necessary to notch 6 additional carrier on either side of the center frequency of interest. Example: In order to create a notch of >20 dB at a frequency of 5.86 MHz, it is necessary to notch carriers 2-7 and 9-14 in addition to carrier 8. To achieve this, the following command would be entered at the NEC command line interface: set_notching –s <sn> -i <ip> -C 2,3,4,5,6,7,8,9,10,11,12,13,14

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