Federal Communications Commission DA 15-1357
ATTACHMENT:
IMPAIRMENT FILE FORMATS
Contents Page
1. Overview of License Impairment Data................................................................................................. 2
2. License Impairment Data (Zip File)...................................................................................................... 2
2.1. Stations in Market Variation ......................................................................................................... 2
2.2. License Impairment by Uplink-Downlink .................................................................................... 3
2.3. ISIX Tableau Report ..................................................................................................................... 4
3. ISIX Case Impairment Data (Zip File) ................................................................................................. 5
3.1. Case 1 Impaired Points File (2x2)................................................................................................. 6
3.2. Case 2 Impaired Points File (2x2)................................................................................................. 7
3.3. Case 3 Impaired Points File (2x2)................................................................................................. 9
3.4. Case 4 Impaired Points File (2x2)............................................................................................... 10
3.5. eNB Points (10x10)..................................................................................................................... 12
4. Reference Files (Zip File) ................................................................................................................... 14
4.1. ISIX Points Reference................................................................................................................. 14
4.2. eNB Points Reference ................................................................................................................. 15
4.3. Overlap (OL) Matrix File............................................................................................................ 16
5. Appendix:  ISIX Case Descriptions: ................................................................................................... 19
6. Appendix:  Data Type Definitions:..................................................................................................... 20
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1. Overview of License Impairment Data
This document provides the data file specifications for the impairment data files that will be made 
available for download to forward auction bidders.  Each file specification includes the format of the file
and definitions of the data elements in the files including a name, description, data type, and notes or 
examples.  At the end of each file specification sample data for the file is provided.  Data type definitions 
and notation rules are explained in an appendix attached to this document.
The impairment data will be broken into three zip files.  The first zip file will provide license-level 
impairment information and maps.  The second zip file contains the detailed impairment information at a 
2x2 km grid cell level for all four ISIX cases.1  In addition, the second zip will contain all the eNB 
dummy points which are predicted to cause interference to at least one 2x2 km grid cell inside a facility’s 
protected contour.2  The third zip file contains several reference files which, unlike the data in the first 
two zip files, do not contain data that change with the clearing target.
2. License Impairment Data (Zip File) 
File name: license_impairment_data-stage#.zip
The first zip file will provide license-level impairment information and maps.  This zip file will be 
generated for every stage and includes the following files:  
1. Information on TV stations assigned to channels in the 600 MHz wireless band
2. License Impairment by Uplink-Downlink (Aggregated impairments for all PEAs given the 
current set of station to channel assignments)
3. ISIX Tableau Report (Tableau file  showing impairment levels)
2.1. Stations in Market Variation
File name: market_variation_station_list.csv
The file contains information about which facilities (including both US and international TV stations)
have been assigned to a channel in the 600 MHz Band.3
File Requirements:
? CSV file (first row contains header). 
? One record per facility.
Field Description Data Type Example/Notes
AuctionID The FCC auction 
number for the forward 
auction 
Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
                                                          
1
See Appendix for a short description of the four ISIX Cases.
2
This data is produced when the ISIX data is created but is not used in the license impairment calculations.  Forward 
auction bidders may nonetheless find this data useful as it provides bidders additional information about the extent 
of Case 3 impairments to each county caused by a specific eNB dummy point at a certain level of overlap.
3 Stations in the 600 MHz Band may be assigned to the uplink, downlink or duplex gap.
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FacilityID Identifies a station 
placed in the 600 MHz 
Band
Integer 5802
ChannelID Identifies the channel 
assigned to a station in 
the 600 MHz Band 
Integer 48
2.2. License Impairment by Uplink-Downlink
File name: license_impairment_by_uplink-downlink-stage#.csv
This file contains information about which category (e.g., Category 1, Category 2 and Not For Sale) each 
license is mapped to based on the overall impairment level for the license (combining impairments from 
both the uplink and downlink portions of the block).  This file also contains a breakdown by uplink and 
downlink of the percent of population with predicted impairment in each license for the current clearing 
target and assignment of stations to channels in the 600 MHz Band.  This information can be found in the 
“DownlinkPercentImpaired” and “UplinkPercentImpaired” fields in the table below.  
File Requirements:
? CSV file (first row contains header). 
? One record per PEA and block.
Field Description Data Type Example/Notes
AuctionID The FCC auction 
number for the forward 
auction 
Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
MarketNumber The PEA (Partial 
Economic Area) ID
String
([“PEA”][0-9] 
[0-9][0-9]){6}
PEA004
PEA205 
BlockID The Block ID of the 10-
MHz portion of wireless 
spectrum (or 5-MHz 
portion if looking at just 
the uplink and 
downlink)
Character
[A-L]{1}
F
CategoryCode Indicates the generic 
license category
”C1” = License 
Category 1
“C2” = License 
Category 2
“NS” = Not for Sale
Character
[C1|C2|NS] 
{2}
C1
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Field Description Data Type Example/Notes
PercentImpaired Percent of Population 
Impaired
The percent of 
population associated 
with the market-block 
(i.e., license) predicted 
to be impaired.
Numeric
[0.0-
100.0]{3,5}
11.2
DownlinkPercentImpaired The percent of the PEA 
population with 
impairments in the 
downlink portion of the 
license predicted to be 
impaired.
Numeric 7.3
UplinkPercentImpaired The percent of the PEA 
population with 
impairments in the 
uplink portion of the 
license predicted to be 
impaired.
Numeric 3.9
Sample Data:
AuctionID,StageID,MarketNumber,BlockID,CategoryCode,PercentImpaired,DownlinkPercentImpaired,
UplinkPercentImpaired
1000,1,PEA142,A,NS,64.3,44.2,54.9
1000,1,PEA142,B,NS,65.0,30.3,54.9
1000,1,PEA142,C,C2,23.3,0.6,23.2
1000,1,PEA142,D,C2,40.1,35.5,24.2
1000,1,PEA142,E,C2, 29.9,26.7,17.0
1000,1,PEA142,F,C1,13.0,0.0,13.0
1000,1,PEA142,G,C1,0.0,0.0,0.0
1000,1,PEA142,H,C1,0.0,0.0,0.0
1000,1,PEA142,I,C1,0.0,0.0,0.0
1000,1,PEA142,J,C1,0.0,0.0,0.0
2.3. ISIX Tableau Report
File name: ISIX_Tableau_Report.twbx
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Tableau file will show impairment data in a map that can be viewed using a Tableau Reader (free to 
download on the Tableau website). The Tableau file will be set up as a dashboard including impairment 
maps with filters where bidders will be able to choose between blocks, uplink/downlink and zoom into 
any particular PEA that they are interested in.  
Below is an example of what one of the Tableau maps may look like using sample impairment data.
3. ISIX Case Impairment Data (Zip File)
File name: ISIX_case_impairment_data-stage#.zip
The second zip file of impairment data contains the detailed impairment information at a 2x2 km grid cell 
level for all four ISIX cases.  In addition, the second zip will contain a file that identifies all the eNB 
dummy points which are predicted to cause interference to at least one 2x2 km grid cell inside a facility’s 
protected contour.  
This zip file will be generated for every stage and includes the following information: 
1. Case 1 Impaired Points: All 2x2 km grid cells (“points”) in the US and Canada which exceed the 
ISIX impairment Case 1 threshold or fall inside a facility’s protected contour.
2. Case 2 Impaired Points: All 2x2 km grid cells (“points”) in the US and Canada which exceed the 
ISIX impairment Case 2 threshold or fall inside a facility’s protected contour.
3. Case 3 Impaired Points: All 2x2 km grid cells (“points”) in the US that fall in areas (counties) 
where an eNB dummy point is predicted to cause interference within a facility’s protected 
contour or that fall in areas (counties) which are inside or within 5 km of a facility’s protected 
contour.
4. Case 4 Impaired Points: All 2x2 km grid cells (“points”) in the US that fall inside a facility’s 
protected contour or that are within 5 km (co-channel) or 0.5 km (adjacent channel) of a facility’s 
protected contour.
5. eNB Points: All eNB dummy points which are predicted to cause interference inside a facility’s
protected contour.
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3.1. Case 1 Impaired Points File (2x2)
File name: case1_ISIX.csv
This file contains all Case 1 impaired points (in the US and Canada) for the current clearing target and 
assignment of stations to channels in the 600 MHz Band.
File Requirements:
? CSV file (first row contains header). 
? One record for every point key – block – facility – channel combination where Ix =1 and/or 
InCon =1.
Field Description Data Type Example/Notes
AuctionID The FCC auction number for the forward auction Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
PointKey The unique identifier of the 2x2 km point Long 
Integer
103245078
BlockID The Block ID of the 5MHz portion of wireless 
spectrum
Character
[A-L]{1}
F
FacilityID Identifies the station causing the interference to the 
wireless base station receiver.
Integer 5802
ChannelID Identifies the channel assigned to the interfering 
station.
Integer 48
Margin The difference between the interference threshold 
and the interfering field strength. The more 
negative this number is, the greater the predicted 
interfering field strength.  
Numeric -9.7412867
Ix Indicates if interference is predicted:
0= interference is not predicted
1= interference is predicted
If Ix=0, then InCon will always equal 1. If Ix=1 
then InCon can be either 0 or 1.
Integer [0|1] 0
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Field Description Data Type Example/Notes
InCon Indicates if the point is inside or outside the TV 
station's protected contour:
0= the point is outside of the TV station's protected 
contour
1= the point is inside of the TV station's protected 
contour
If InCon=0, then Ix will always equal 1.  If InCon 
= 1, then Ix can be either 0 or 1.
Integer
[0|1]
1
Sample Data:
AuctionID,StageID,PointKey,BlockID,FacilityID,ChannelID,Margin,Ix,InCon
1000,1,48054992,A, 189357,44,-0.234392,1,0
1000,1,48054992,B, 189357,44,-0.234392,1,0
1000,1,48055106,C, 189357,45,-1.720639,1,0
1000,1,48084848,A, 189357,44,-1.325575,1,0
1000,1,48084848,B, 189357,44,-1.325575,1,0
1000,1,48084851,A, 189357,44,-1.290575,1,0
1000,1,48084851,B, 189357,44,-1.290575,1,0
1000,1,48084854,A, 189357,44,-1.24229,1,0
1000,1,48084854,B, 189357,44,-1.24229,1,0
1000,1,48084860,A, 189357,44,-1.193686,1,0
1000,1,48084860,B, 189357,44,-1.193686,1,0
3.2. Case 2 Impaired Points File (2x2)
File name: case2_ISIX.csv
This file contains all Case 2 impaired points (in the US and Canada) for the current clearing target and 
assignment of stations to channels in the 600 MHz Band.
File Requirements:
? CSV file (first row contains header). 
? One record for every point key – block – facility – channel combination where Ix =1 and/or 
InCon =1.
Field Description Data Type Example/Notes
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Field Description Data Type Example/Notes
AuctionID The FCC auction number for the forward auction Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
PointKey The unique identifier of the 2x2 km point Long Integer 103245078
BlockID The Block ID of the 5MHz portion of wireless 
spectrum
Character
[A-L]{1}
F
FacilityID Identifies the station causing the interference to the 
wireless base station.
Integer 5802
ChannelID Identifies the channel assigned to the interfering 
station.
Integer 43
Margin The difference between the interference threshold 
and the interfering field strength. The more 
negative this number is, the greater the predicted 
interfering field strength.  
Numeric -9.7412867
Ix Indicates if interference is predicted:
0= interference is not predicted
1= interference is predicted
If Ix=0, then InCon will always equal 1. If Ix=1 
then InCon can be either 0 or 1.
Integer [0|1] 0
InCon Indicates if the point is inside or outside the TV 
station's protected contour:
0= the point is outside of the TV station's protected 
contour
1= the point is inside of the TV station's protected 
contour
If InCon=0, then Ix will always equal 1.  If InCon 
= 1, then Ix can be either 0 or 1.
Integer [0|1] 1
Sample Data:
AuctionID,StageID,PointKey,BlockID,FacilityID,ChannelID,Margin,Ix,InCon
1000,1,51225377,A,6124,31,-1.281361,1,0
1000,1,51225380,A,6124,31,-1.050331,1,0
1000,1,51225386,A,6124,31,-1.861965,1,0
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1000,1,51225389,A,6124,31,-1.545013,1,0
1000,1,51225392,A,6124,31,-1.521709,1,0
1000,1,51225395,A,6124,31,-1.433567,1,0
1000,1,51225398,A,6124,31,-1.397308,1,0
1000,1,51225401,A,6124,31,-1.230541,1,0
1000,1,51225407,A,6124,31,-1.156147,1,0
3.3. Case 3 Impaired Points File (2x2)
File name: case3_ISIX.csv
This file contains all Case 3 impaired points (in the US only) for the current clearing target and 
assignment of stations to channels in the 600 MHz Band.  International TV stations with channel 
assignments that fall within the 600 MHz wireless band plan based on the current clearing target are 
included in the protected station list.  However, international protected contours are truncated at the US 
border when considering areas where interference could occur.
File Requirements:
? CSV file (first row contains header). 
? One record for every point key – block – facility – channel combination.
? There are records for all impaired points where county ix =1 and/or incon2= 1
Field Description Data Type Example/Notes
AuctionID The FCC auction number 
for the forward auction 
Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
PointKey The unique identifier of the 
2x2 km point in the 
impairing county
Long Integer 103245078
BlockID The Block ID of the 5MHz 
portion of wireless 
spectrum
Character
[A-L]{1}
F
FacilityID Identifies the station 
causing the interference to 
the wireless base station.
Integer 5802
ChannelID Identifies the channel 
assigned to the interfering 
station.
Integer 43
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Field Description Data Type Example/Notes
Ix Indicates if interference is 
predicted:
0= interference is not 
predicted
1= interference is predicted
If Ix=0, then InCon2 must 
equal 1.  
Integer [0|1] 1
InCon2 Indicates if county touches 
or comes within 5 km of 
protected TV contour:
0= the county does not 
come within 5 km of the 
protected contour boundary
1= the county comes within 
5 km of the protected 
contour boundary
If InCon2=0, then Ix must 
equal 1.
Integer [0|1] 1
Sample Data:
AuctionID,StageID,PointKey,BlockID,FacilityID,ChannelID,Ix,InCon2
1000,1,46289744,H,7020138,38,1,1
1000,1,46289747,A,6124,31,1,0
1000,1,46289747,A,7020132,32,1,1
1000,1,46289747,A,7020133,33,1,1
1000,1,46289747,B,7020132,32,1,1
1000,1,46289747,B,7020133,33,1,1
1000,1,46289747,B,7020134,34,1,1
1000,1,46289747,C,7020132,32,1,1
3.4. Case 4 Impaired Points File (2x2)
File name: case4_ISIX.csv
This file contains all Case 4 impaired points (in the US only) for the current clearing target and 
assignment of stations to channels in the 600 MHz Band.  International TV stations with channel 
assignments that fall within the US 600 MHz wireless band plan based on the current clearing target are 
included in the protected station list.  However, international protected contours are truncated at the US 
border when considering areas where interference could occur.
File Requirements:
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? CSV file (first row contains header). 
? One record for every point key – block – facility – channel combination where ix =1
Field Description Data Type Example/Notes
AuctionID The FCC auction 
number for the 
forward auction 
Integer
{1,6}
1002
StageID Stage Number Integer
{1,3}
1
PointKey The unique identifier 
of the 2x2 km point
Long Integer 103245078
BlockID The Block ID of the 
5MHz portion of 
wireless spectrum
Character
[A-L]{1}
F
FacilityID Identifies the station 
causing the 
interference to the 
wireless base station.
Integer 5802
ChannelID Identifies the channel 
assigned to the 
interfering station.
Integer 43
Ix Indicates if 
interference is 
predicted:
1= interference is 
predicted based on 
point falling inside the 
protected contour or 
within either 5 km of 
protected contour (co-
channel) or within 0.5 
km of protected 
contour (adjacent-
channel)
Integer [1] 1
InCon2 Indicates if the point 
is inside the facility’s 
protected contour:
0= the point is outside 
the protected contour
1= the point falls 
inside the protected 
contour
Integer [0|1] 1
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Sample Data:
AuctionID,StageID,PointKey,BlockID,FacilityID,ChannelID,Ix,InCon2
1000,1,51464576,B,7020344,44,1,0
1000,1,51464579,A,7020344,44,1,0
1000,1,51464579,B,7020344,44,1,0
1000,1,51464582,A,7020344,44,1,0
1000,1,51464582,B,7020344,44,1,0
1000,1,51464585,A,7020344,44,1,0
1000,1,51464585,B,7020344,44,1,0
3.5. eNB Points (10x10)
File name: eNB_points.csv
This file contains all the eNB dummy points which are predicted to cause interference inside a facility’s 
protected contour.  Interference from an eNB dummy point serves as a proxy for the 10x10 km grid area 
surrounding the dummy point and therefore a single eNB point may be mapped to multiple county areas.  
File Requirements:
? CSV file (first row contains header). 
? One record for every facility – point – county combination.
Field Description Data Type Example/Notes
AuctionID The FCC auction number for the forward auction Integer
{1,6}
1002
OL Overlap value. Value from +5 to -5 Integer -5
FacilityID Identifies the station being interfered by the eNB 
dummy point.
Integer 5802
PointID Unique identifier of the eNB point. Integer 5802
CountyFips The County FIPS code of a county that touches or
intersects with a 10 x 10 kilometer bounding box with 
the eNB point at its center.
Character 
[0-9]{5}
01001
LeastIX Maximum(IXvalue = InterferenceThreshold –
Interference).  Where InterferenceThreshold is a 
function of the spectral overlap (OL)
Numeric
MostIX Minimum(IXvalue) Numeric
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Field Description Data Type Example/Notes
Hist1 Count of number of 2x2 km grid points inside protected 
contour where IXvalue < -30 dB 
Integer
Hist2 Count of number of 2x2 km grid points inside protected 
contour where -30 <= IXvalue < -27 dB
Integer
Hist3 Count of number of 2x2 km grid points inside protected 
contour where -27 <=  IXvalue < -24 dB
Integer
Hist4 Count of number of 2x2 km grid points inside protected 
contour where -24 <=  IXvalue < -21 dB
Integer
Hist5 Count of number of 2x2 km grid points inside protected 
contour where -21 <  IXvalue <= -18 dB
Integer
Hist6 Count of number of 2x2 km grid points inside protected 
contour where -18 <  IXvalue <= -15 dB
Integer
Hist7 Count of number of 2x2 km grid points inside protected 
contour where -15 < IXvalue < = -12 dB
Integer
Hist8 Count of number of 2x2 km grid points inside protected 
contour where -12 < IXvalue <= -9 dB
Integer
Hist9 Count of number of 2x2 km grid points inside protected 
contour where -9 < IXvalue <= -6 dB
Integer
Hist10 Count of number of 2x2 km grid points inside protected 
contour where -6 < IXvalue < = -3 dB
Integer
Hist11 Count of number of 2x2 km grid points inside protected 
contour where -3 < IXvalue < 0 dB
Integer
Sample Data:
AuctionID,OL,FacilityID,PointID,CountyFips,LeastIX,MostIX,Hist1,Hist2,Hist3,Hist4,Hist5,Hist6,Hist7
,Hist8,Hist9,Hist10,Hist11
1000,5,35608,56665,06027,-9.688053,-9.688053,0,0,0,0,0,0,0,1,0,0,0
1000,5,35608,53331,06027,-23.743518,-23.743518,0,0,0,1,0,0,0,0,0,0,0
1000,5,35608,56665,06027,-24.371799,-24.371799,0,0,1,0,0,0,0,0,0,0,0
1000,5,35608,56667,06027,-24.724719,-24.724719,0,0,1,0,0,0,0,0,0,0,0
1000,5,35608,56711,06027,-1.358432,-1.358432,0,0,0,0,0,0,0,0,0,0,1
1000,5,35608,56733,06027,-23.934985,-23.934985,0,0,0,1,0,0,0,0,0,0,0
1000,5,22161,56667,06027,-17.909518,-17.909518,0,0,0,0,0,1,0,0,0,0,0
1000,5,22161,52328,06073,-0.0006771,-23.91227,0,0,0,11,3,19,9,14,14,20,28
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4. Reference Files (Zip File)
File name: reference_files.zip
This zip file includes the following files which do not change regardless of clearing target but will still be 
generated for every stage:
1. ISIX Points Reference: All 2x2 grid points referenced in the Case 1 through Case 4 reports
2. eNB Points Reference:  All eNB dummy points
3. Overlap  Matrix: Contains information on the ISIX spectral overlaps between wireless and TV 
channels for all of the band plans under consideration.
4.1. ISIX Points Reference
File name: ISIX_points_reference.csv
This file contains all 2x2 km grid points referenced in the Case 1 through Case 4 reports. 
File Requirements:
? CSV file (first row contains header). 
? One record for every point key.
? There are records for all points including points with 0 (Zero) population
Field Description Data Type Example/Notes
AuctionID The FCC auction number for 
the forward auction 
Integer
{1,6}
1002
PointKey The unique identifier of the 
2x2 km point
Long Integer 103245078
Latitude The latitude of the 2x2 km 
point population centroid
Numeric 30.997389880000
Longitude The longitude of the 2x2 km 
point population centroid
Numeric -86.075708100000
PointPopulationCount The population count of the 
2x2 km point
Integer 7560
CountyFips The County FIPS code to 
which this 2x2 km point 
belongs.
Character
[0-9]{5}
01001
48041
4T007
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Field Description Data Type Example/Notes
MarketNumber The PEA (Partial Economic 
Area) ID or Canadian market 
ID 
String
([“PEA”][0-9] [0-
9][0-9]){6}
Or
([“CAN”][0-9] [0-
9][0-9]){6}
PEA004
CAN065
Country The country to which this 2x2
km point belongs.
String
[US|CA] {2}
US
CA
Sample Data:
AuctionID,PointKey,Latitude,Longitude,PointPopulationCount,CountyFips,MarketNumber,Country
1000,64326954,38.8285,-123.128,0,06097,PEA004,US
1000,64356741,38.8465,-122.39,0,06055,PEA004,US
1000,64356816,38.8465,-122.828,0,06097,PEA004,US
1000,64356819,38.8465,-122.852,0,06097,PEA004,US
1000,64356822,38.8465,-122.875,0,06097,PEA004,US
1000,64356828,38.8385,-122.903,2,06097,PEA004,US
1000,77896270,47.0257,-63.9853,0,4T007,CAN007,CA
1000,77896273,47.0257,-64.0114,0,4T007,CAN007,CA
1000,77896276,47.0257,-64.0375,0,4T007,CAN007,CA
1000,77896282,47.0257,-64.0636,0,4T007,CAN007,CA
1000,77926174,47.0438,-63.9592,0,4T007,CAN007,CA
1000,77926180,47.0438,-63.9853,0,4T007,CAN007,CA
1000,77926183,47.0438,-64.0114,0,4T007,CAN007,CA
4.2. eNB Points Reference 
File name: eNB_points_reference.csv
This file contains all the eNB dummy points referenced in eNB Points report. 
File Requirements:
? CSV file (first row contains header). 
? One record for every point – county combination.
Field Description Data Type Example/Notes
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Field Description Data Type Example/Notes
AuctionID The FCC auction number for the 
forward auction 
Integer
{1,6}
1002
PointID Unique identifier of the eNB transmit 
point.
Integer
GrdLon_NAD83 The longitude of the eNB point in 
NAD 83.
Numeric 30.997389880000
GrdLat_NAD83 The latitude of the eNB point in 
NAD83
Numeric 86.075708100000
CountyFips The County FIPS code of a county that 
touches or intersects with a 10 x 10 
kilometer bounding box with the eNB 
point at its center.
Character [0-
9]{5}
01001
CountyName Name of the county String
{1,100}
Jefferson
MarketNumber The PEA (Partial Economic Area) ID String
([“PEA”][0-9] [0-
9][0-9]){6}
PEA004
PEA205 
EAMarketNumber Economic Area in which eNB point 
falls
Character {5} “EA” + 3 digit 
EA number
Sample Data:
AuctionID,PointID,GrdLon_NAD83,GrdLat_NAD83,CountyFips,CountyName,MarketNumber, 
EAMarketNumber
1000,2750,-94.4446,29.9925,48291,Liberty,PEA010,EA131
1000,2750,-94.4446,29.9925,48245,Jefferson, PEA135,EA087
1000,2751,-94.4446,29.9026,48291,Liberty, PEA010,EA131
1000,2751,-94.4446,29.9026,48071,Chambers, PEA010,EA131
1000,2751,-94.4446,29.9026,48245,Jefferson, PEA135, EA087
1000,2752,-94.4446,29.8127,48071,Chambers, PEA010,EA131
1000,2753,-94.4446,29.7227,48071,Chambers, PEA010,EA131
4.3. Overlap (OL) Matrix File 
File name: OL_matrix.csv
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This file contains information on the amount of spectral overlap, in MHz, between the interfering 
transmitter channel and the interfered-with receiver channel. 
File Requirements:
? CSV file (first row contains header). 
? One record for every clearing target – and 5 MHz block combination
Field Description Data Type Example/Notes
AuctionID The FCC auction number for the 
forward auction 
Integer
{1,6}
1002
ClearingTarget Integer number of MHz reclaimed from 
TV corresponding to the national band 
plan clearing target (CT).
Integer 84
UL_DL “U” when TV channel is co- or 
adjacent-channel with spectrum used 
for communication between mobile 
device and base station receiver.
“D” when TV channel is co- or 
adjacent-channel with spectrum used 
for base station transmitter to mobile 
device receiver.
Character
[U|D]{1}
U
BlockID Character representing a 5 MHz 
wireless channel block (A through L, 
depending on CT).
Character
[A-L]{1}
G
First Row: <DTV 
Channel Number> 
from 51 to 27 
separated by 
commas 
Integer value corresponding to 6 MHz 
TV channels.  A clearing target of 144 
MHz goes to channel 27, so no lower 
channel numbers are needed.
Integer [27-51] 36
Subsequent rows:
<matrix values>
Integer represents the amount of 
spectral offset (negative values) or 
overlap (positive values) in MHz units.  
NULL value when spectral overlap is 
not considered significant.  
Integer [-5-
+5]{0,2}
-5
Sample Data:
AuctionID,ClearingTarget,UL_DL,Blk,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,
30,29,28,27
1000,42,U,B,5,-1,,,,,,,,,,,,,,,,,,,,,,,
1000,42,U,A,1,4,-2,,,,,,,,,,,,,,,,,,,,,,
1000,42,D,B,,,-3,3,2,-4,,,,,,,,,,,,,,,,,,,
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1000,42,D,A,,,,-2,4,1,-5,,,,,,,,,,,,,,,,,,
1000,48,U,C,5,-1,,,,,,,,,,,,,,,,,,,,,,,
1000,48,U,B,1,4,-2,,,,,,,,,,,,,,,,,,,,,,
1000,48,U,A,-4,2,3,-3,,,,,,,,,,,,,,,,,,,,,
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5. Appendix:  ISIX Case Descriptions:
Interference to Wireless (ISIX Cases 1 & 2):
Interference to: Wireless Base Station Receiver
Caused by: DTV Transmitter
Case 1
DTV 
Receiver
Wireless 
Base Station
LTE 
Mobile Device
DTV 
Transmitter
Interference to: Mobile Device Receiver
Caused by: DTV Transmitter
Case 2
DTV 
Receiver
Wireless 
Base Station
LTE 
Mobile Device
DTV 
Transmitter
Interference to TV (ISIX Cases 3 & 4):
Interference to: DTV Receiver
Caused by: Wireless Base Station Transmitter
Case 3
DTV 
Receiver
Wireless 
Base Station
LTE 
Mobile Device
DTV 
Transmitter
Interference to: DTV Receiver
Caused by: Mobile Device Transmitter
Case 4
DTV 
Receiver
Wireless 
Base Station
LTE 
Mobile Device
DTV 
Transmitter
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6. Appendix:  Data Type Definitions:
The following is a guide to interpreting data types defined in this document. This guide is based on 
regular expressions used in XML standards.
Valid Data Types used in this Document
Character: A character is a single standard ASCII character. The following list has examples of valid 
ASCII characters:
? a
? D
? 3
? %
String: A string contains one or more characters and can contain whitespace. The following list has 
examples of valid strings:
? PEA001
? 005
? 588.3-593.3 MHz + 628.3-633.3 MHz
? Huntsville-Decatur-Florence, AL
Numeric: Numeric is a generic data type that covers a number of different underlying data types. As a 
result, anything defined as numeric could be any of the following:
? Decimal
? Integer
? Long
Integer: The integer data type is used to specify a numeric value without a fractional component.
? It’s assumed that any Integers defined in this document are unsigned and never include a (+) plus 
or (-) minus sign. Any signed Integers containing a + or – are considered invalid.
? If the Integer is of defined length then curly brackets should be used. E.g., {3} indicates the 
integer should be exactly 3 numbers long.
? The maximum value of an unsigned Integer is 232-1 which is 4294967295
The following list has examples of valid Integers:
? 009
? 9
? 2147483647
The following list has examples of invalid Integers:
? -009
? +009
? 2147483648 (i.e. too large)
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Restricting values for a data type
Restrictions are used to define acceptable values for any given data type. The following lexicon is used 
when defining data types:
? Square brackets define the pattern.
o e.g., [A-L] means only the uppercase letters A through L are allowed. 
o e.g., [U|D] means only the uppercase letters U or D are allowed.
o e.g., [0-9] means only the numbers 0 through 9 are allowed
? Curly brackets define the length including whitespace.
o e.g., {3} means the value has to be exactly 3 characters long.
o e.g., {1,3} means the value has to be a minimum of 1 character and a maximum of 3 
characters.
o e.g., {0,50} means the value has to be a minimum of 0 characters and a maximum of 50 
characters.
Example 1:
The Data Type is defined as follows:
Integer
{3}
The curly brackets mean only a 3 digit integer is allowed.
Valid Values for example 1:
? 009
? 056
? 102
Invalid Values for example 1:
? 09
? 3502
? 1
? +12
? -35
Example 2:
The Data Type is defined as follows:
String
[A-L]{1}
The square brackets mean only the uppercase letters A through L are allowed and the curly brackets mean 
it must be exactly 1 character long.
Valid Values for example 2:
? B
? L
Invalid Values for example 2:
? a
? M
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? 6
Example 3:
The Data Type is defined as follows:
String
[0-9]{3}
The square brackets mean only the numbers 0 through 9 are allowed and the curly brackets mean it must 
be 3 characters long.
Valid Values for example 3:
? 001
? 023
? 358
Invalid Values for example 3:
? 2
? 01
? 2026
Example 4:
The Data Type is defined as follows:
String
[0-9]{1,2}
The square brackets mean only the numbers 0 through 9 are allowed and the curly brackets mean it must 
be a minimum of 1 character long and a maximum of 2 characters long.
Valid Values for example 4:
? 4
? 04
? 41
Invalid Values for example 4:
? 123
? Blank or null value
Example 5:
The Data Type is defined as follows:
String
[US|CA|MX]{2}
The square brackets mean the pattern must be either US, CA or MX. The curly brackets mean it must be 
exactly 2 characters long.
Valid Values for example 5:
? US
? CA
Invalid Values for example 5:
? C
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? USA
Example 6:
The Data Type is defined as follows:
String
([“PEA”][0-9] [0-9] [0-9]){6}
The square brackets inside the round brackets mean the pattern must be a concatenation of the text “PEA” 
followed by three single numbers, with each number ranging from 0 through 9. The curly brackets mean 
it must be exactly 6 characters long.
Valid Values for example 6:
? PEA002
? PEA356
Invalid Values for example 6:
? PEA0001
? PEA-005
? PEA-05
? PEA-0512
? PEA-2
Example 7:
The Data Type is defined as follows:
String
{0,50}
The absence of square brackets mean there are no restrictions to the characters in this string. The curly 
brackets mean it must be a minimum of 0 characters long (i.e., can be blank/null) and a maximum of 50 
characters long.
Valid Values for example 7:
? 588.3-593.3 MHz + 628.3-633.3 MHz
? Albuquerque-Santa Fe, NM
Invalid Values for example 7:
? Greenville-Spartanburg, SC-Asheville, NC-Anderson, SC 
? This is an invalid string which is longer than 50 characters including spaces.