Summary'Report' 'As'Found'Condi6ons'of'the'Franklin' - - PowerPoint PPT Presentation

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Summary'Report' 'As'Found'Condi6ons'of'the'Franklin' - - PowerPoint PPT Presentation

Nov 17, 2022 154 likes •323 views

Franklin!Regional!Council!of!Government! Franklin!County!Emergency!Communica7ons!System! ! Summary'Report' 'As'Found'Condi6ons'of'the'Franklin' County'Emergency'' Communica6ons'System' ! ! November'2015' ! ! ! ! ! ! ! ! ! !

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SLIDE 1

!

Summary'Report' '“As'Found”'Condi6ons'of'the'Franklin' County'Emergency'' Communica6ons'System'

! !

November'2015'

! ! ! ! ! ! !

Franklin!Regional!Council!of!Government! Franklin!County!Emergency!Communica7ons!System!

! ! ! ! ! Submi;ed!By:!!!!!Communica7ons!Design!Consul7ng!Group!LLC!!!!9!Tibbe;s!Road!!!Barrington,!NH!!03825!!!!603/905.9406!

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SLIDE 2

Franklin'County'Emergency'Communica6ons'System'

Purpose!of!this!Summary!Report!

The!purpose!of!this!summary!report!is!to!provide!the!results!of!the!equipment/system!tests! and!measurements!that!was!conducted!during!the!week!of!October!19,!2015.! Analysis!of!this!data!will!be!the!basis!of!providing!recommenda7ons!for!improvement!and!will! be!submi;ed!in!a!subsequent!detailed!report!that!answers!the!following!ques7ons:! " Is#the#equipment#currently#in#service#capable#of#providing#reliable#service#now#and#the# distant#future?## " Can#the#system#be#improved#or#upgraded#to#increase#reliability#and#performance# The!“raw”!test!data!was!submi;ed!to!the!FCECS!at!a!special!mee7ng!held!on!November!2,! 2015.!The!data!showed!that!several!cri7cal!simulcast!values!were!out!of!alignment.!GMC! recommended!to!the!Commi;ee!that!a!system!op7miza7on!be!conducted!as!soon!as!possible.! The!Commi;ee!agreed!and!approved!funding!to!hire!GMC!and!BCS!to!op7mize!the!simulcast! network.! Simulcast!network!op7miza7on!began!on!November!9,!2015!and!is!on[going.!!This!summary! report!provides!an!update!regarding!this!process.!

2# D!R!A!F!T!Report!

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SLIDE 3

Franklin'County'Emergency'Communica6ons'System'

Simulcast!Elements!

3# D!R!A!F!T!Report!

CAPTURE!ZONE! The#mobile#receiver#only#receives#a# signal#from#one#site#–#best#signal# condi?on# ! OVERLAP!ZONE![Non[Capture!Zone]! Area#where#mobile#receives#signal#from# two#or#more#transmiAers#[transmiAer# signals#are#nearly#equal#level.# # # # ! !

# # # # #

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SLIDE 4

Franklin'County'Emergency'Communica6ons'System'

Key!Issues!to!Know!About!Simulcas7ng!

  • 1. FREQUENCY!STABILITY:!Each#transmiAer#needs#to#transmit#its#carrier#within#0.1#Hz#of#each#
  • ther##
  • 2. SIGNAL!LAUNCH!TIMES:!All#transmit#audio#and#CTCSS#tones#need#to#be#launched#at#the#same#

?me#–#or#in#alignment#by#+/L#30#degrees#

  • 3. BALANCED!TRANSMITTER!DEVIATION:!Modula?on#needs#to#be#within#0.2#dB#of#each#other##

– These#are#stringent#technical#requirements;#GPS#clocks#allows#this#level#of#precision# " What#happens#if#they#are#out#of#alignment#or#tolerance?#

  • Signals#in#the#overlap#[area#where#there#are#signals#from#mul?ple#transmiAers]#

generate#TDI#[?me#delay#interference]#

  • TDI#is#generated#when#there#are#comparable#signals#levels#[signal#from#transmiAers#

nearly#the#same#at#the#receiver];#and,##phase#delay#[signal#from#mul?ple#transmiAer#are# received#out#of#phase#

  • Note!that!signals!in!the!overlap!areas!will!never!be!as!good!as!signals!in!the!capture!

area!

4# D!R!A!F!T!Report!

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SLIDE 5

Franklin'County'Emergency'Communica6ons'System'

System/Equipment!Levels!and!Values!! Measured!and!Recorded:!

5#

October#2015#

D!R!A!F!T!Report!

For!each!site:!

  • Audio:

! ! !Transmi;er!line!in,!receiver!line!out,!voted!audio!output,!console!audio! ! ! ! !input!and!output!

  • Transmi;er:

!CTCSS!and!audio!devia7on,!frequency,!power!output,!reflected!power,! ! ! ! !combiner!loss!

  • Receiver:

! !Sensi7vity,!desensi7za7on,!mul7coupler,!site!noise!

  • Antenna:

! !Return!loss!line!sweeps!

  • Mul7plexer:

!Audio!levels,!simulcast!and!latency!! ! #

#

5#

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SLIDE 6

Franklin'County'Emergency'Communica6ons'System'

Summary!of!“As!Found”!Equipment!and!System!Parameters!

6# D!R!A!F!T!Report! As#Found#/#SIM-1 As#Found#/#SIM-2 !10.0%dBm%[!9.8%to%!10.3] !3.0%to%!8.3%dBm !9.4%to%!10.2%dBm 1.5%kHz%[1.45%to%1.55] 1.35%to%2.32%kHz 1.15%to%2.41%kHz !10.0%dBm%[!9.8%to%!10.3] !9.7%to%!10.3 !9.4%to%!10.0%dBm 300%Hz 270%to%380%Hz 270%to%290%Hz % Found%excessive%Tx% combiner%loss Observed%P25%co! channel% interference%at%!116% dBm%[not%critical] Out%of%tolerance Not%optimized;%needs%adjustment Refer#to#Appendix#for#Detail#Matrix T!line%high%Return%Loss%on%SIM!1%and% Receive%antennas%shows%possible% antenna%problem Found%bad%GPS%clock;%not%generating% CTCSS Borden%site Erving Target#Range ITEM Voter%audio%output%to% sites Transmitter%Deviation Voting%status%tone CTCSS%transmitter% deviation Shelburne New%Salem General During%testing%found%GPS%clock%not% During%system%evaluation%found%various%locations%in%the%County% where%signal%was%strong%[~80%dBm]%and%voice%was%very%noisy%with% variying%levels%of%audio Mt%Grace

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SLIDE 7

Franklin'County'Emergency'Communica6ons'System'

Current!Transmit!Antenna!Informa7on! All!Receive!Antennas!Omnidirec7onal!

7# D!R!A!F!T!Report!

Mt!Grace# Erving# New!Salem# Country!Hill# Shelburne# Buckland# Charlemont# Borden#

Omnidirec7onal!Antenna# ! # ! # Direc7onal!Antenna# !# !# Direc7onal!Transmit!Antenna# !# !#

Toby# Plainfield#

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SLIDE 8

! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

WHITE&AREA:&&Coverage&based&on&95%&availability& with&audio&quality&DAQB3.4& & This&means&that&inside&the&white&area,&you&will&have& successful&communications&with&good&audio&95&out&of& 100&times& & GRAY&AREA:&&Coverage&less&than&95%&/&DAQB3.4&

MAPB1:&&“As&Found”&Coverage&Prediction&

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SLIDE 9

! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

MOSTBLIKELYBSERVER& Shows&which&site&provides&the&greatest&signal&in&a&given&area& [each&site&is&represented&with&a&unuque&color]&

MAPB2:&&&“As&Found”&Coverage&Prediction&

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SLIDE 10

! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

MAPB3:&&“As&Found”&Timing&Prediction&

GREEN:&&&&&&In&NonBCapture&area&at&TDI&threshold;&received&audio&good& & YELLOW:&&TDI&is&noticeable;&audio&intelligible&but&with&interference& & RED:&&&&&&&&&&&&TDI&severe;&unusable&

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SLIDE 11

! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

GREEN:&&&&&&In&NonBCapture&area&at&TDI&threshold;&received&audio&good& & YELLOW:&&TDI&is&noticeable;&audio&intelligible&but&with&interference& & RED:&&&&&&&&&&&&TDI&severe;&unusable&

MAPB4:&&&Newly&Calculated&Timing&Values& Coverage&Prediction&

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SLIDE 12

Franklin'County'Emergency'Communica6ons'System'

Op7miza7on!Process!–!Week!of!November!9,!2015!

9#

October#2015#

D!R!A!F!T!Report!

! Discussion!by!Burlington!Communica7ons!Services,!Inc.!regarding!op7miza7on.!

#

9#

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SLIDE 13

Franklin'County'Emergency'Communica6ons'System'

Next!Steps!

10#

October#2015#

D!R!A!F!T!Report!

Next!steps:!

  • 1. Finalize!and!submit!detailed!report!based!on!contractual!SOW!requirements:!

" Includes!findings!and!recommenda7ons!for!improvement!

  • 2. Con7nue!to!provide!technical!assistance!to!FCECS!!to!improve!system!performance#

#

10#

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SLIDE 14

Franklin'County'Emergency'Communica6ons'System'

!

11#

October#2015#

D!R!A!F!T!Report!

#

Appendix#

11#

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SLIDE 15

Franklin'County'Emergency'Communica6ons'System'

Appendix!/!Detailed!Test!Data!–!Page!1!of!2!

12# D!R!A!F!T!Report!

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SLIDE 16

Franklin'County'Emergency'Communica6ons'System'

Appendix!/!Detailed!Test!Data!–!Page!2!of!2!

13# D!R!A!F!T!Report!