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

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Document ID	1090806
Application ID	KpWxiOtFWV6ZGwigjhlHtQ==
Document Description	Notching Instructions
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	2.8kB (35035 bits)
Date Submitted	2009-04-03 00:00:00
Date Available	2009-05-07 00:00:00
Creation Date	2008-03-05 16:29:34
Producing Software	Acrobat Distiller 8.0.0 (Windows)
Document Lastmod	2008-03-05 16:29:34
Document Title	untitled

Network Element
Notching Instructions
CURRENT Group, LLC
Network Element Notching Instructions
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  = serial number of the unit. This is used to calculate the SNMP pass phrase.
-i  = IP address of the unit from which you want the current settings.
1. At the Unix command line enter:
get_notching –s  -I 
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  = serial number of the unit. This is used to calculate the SNMP pass phrase.
-i  = IP address of the unit to be modified.
-C  = comma separated list of carriers. Carriers are listed as 1 through 84.
1. At the Unix command line enter:
set_notching –s  -i  -C 
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.
February 29, 2008
CURRENT Group, LLC
Network Element Notching Instructions
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
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Low Voltage
Center Frequency
(MHz)
4.4922
4.6875
4.8828
5.0781
5.2734
5.4688
5.6641
5.8594
6.0547
6.2500
6.4453
6.6406
6.8359
7.0313
7.2266
7.4219
7.6172
7.8125
8.0078
8.2031
8.3984
8.5938
8.7891
8.9844
9.1797
9.3750
9.5703
9.7656
9.9609
10.1563
10.3516
10.5469
10.7422
10.9375
11.1381
11.3281
11.5234
11.7188
11.9141
12.1094
12.3047
12.5000
Medium Voltage
Center Frequency
(MHz)
47.7656
47.5703
47.3750
47.1797
46.9844
46.7891
46.5937
46.3984
46.2031
46.0078
45.8125
45.6172
45.4219
45.2266
45.0312
44.8359
44.6406
44.4453
44.2500
44.0547
43.8594
43.6641
43.4687
43.2734
43.0781
42.8828
42.6875
42.4922
42.2969
42.1016
41.9062
41.7109
41.5156
41.3203
41.1197
40.9297
40.7344
40.5391
40.3437
40.1484
39.9531
39.7578
Continued Æ
February 29, 2008
CURRENT Group, LLC
Network Element Notching Instructions
Carrier Number
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
February 29, 2008
Low Voltage
Center Frequency
(MHz)
12.6953
12.8906
13.0859
13.2813
13.4766
13.6719
13.8672
14.0625
14.2578
14.4531
14.6844
14.8438
15.0391
15.2344
15.4297
15.6250
15.8203
16.0156
16.2109
16.4063
16.6016
16.7969
16.9922
17.1875
17.3828
17.5781
17.7734
17.9688
18.1641
18.3594
18.5547
18.7500
18.9453
19.1406
19.3359
19.5313
19.7266
19.9219
20.1172
20.3125
20.5078
20.7031
Medium Voltage
Center Frequency
(MHz)
39.5625
39.3672
39.1719
38.9766
38.7812
38.5859
38.3906
38.1953
38.0000
37.8047
37.5734
37.4141
37.2187
37.0234
36.8281
36.6328
36.4375
36.2422
36.0469
35.8516
35.6562
35.4609
35.2656
35.0703
34.8750
34.6797
34.4844
34.2891
34.0937
33.8984
33.7031
33.5078
33.3125
33.1172
32.9219
32.7266
32.5312
32.3359
32.1406
31.9453
31.7500
31.5547
CURRENT Group, LLC
Network Element Notching Instructions
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  -i  -C 2,3,4,5,6,7,8,9,10,11,12,13,14
February 29, 2008

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