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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