Path Survey Report Merced Rel 1

8/9/2019 Path Survey Report Merced Rel 1

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Microwave

PathSurvey

Report

DeltaWirelessIncorporated,

MercedCounty

CastleDispatchHops

NA13111245773

Release1.0

December16,2013

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MICROWAVE PATH SURVEY REPORTAVIAT NETWORKS

Issue Releases

IssueNumber

IssueRelease Date

Changes Preparer

1.0 12/16/2013 Initial Release Rich Weiland

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TABLE OF CONTENTS

GENERAL.................................................................................................................................................................................4

STATEMENTOFWORK....................................................................................................................................................................4

SURVEYPROCEDURES

.....................................................................................................................................................................

4

DESIGNCRITERIA.............................................................................................................................................................................4

CLEARANCECRITERIA......................................................................................................................................................................4

MICROWAVEPATHPERFORMANCECALCULATIONSANDWARRANTIES.......................................................................................5

MICROWAVEFREQUENCYENGINEERING/INTERSYSTEMINTERFERENCE ANALYSIS..................................................................5

MICROWAVEFREQUENCYSELECTION............................................................................................................................................5

MICROWAVEFREQUENCYCOORDINATIONANDFCCLICENSING..................................................................................................5

SPECIALCONSIDERATIONS..............................................................................................................................................................5

LISTOFSITESANDPATHS........................................................................................................................................................7

SITES(INTHEORDERTHEYAPPEARINTHISREPORT):..................................................................................................................................7

PATHS(INTHEORDERTHEYAPPEARINTHISREPORT):................................................................................................................................7

SYSTEM

INFORMATION

...........................................................................................................................................................

8

SYSTEMDESCRIPTION.......................................................................................................................................................................

SYSTEMLAYOUT................................................................................................................................................................................

SYSTEMSPREADSHEETSUMMARY....................................................................................................................................................

SITEINFORMATION ..................................................................................................................................................................

SITEDESCRIPTION.............................................................................................................................................................................

SITEPHOTOS.....................................................................................................................................................................................

MAPEXTRACTS..................................................................................................................................................................................

PATHINFORMATION.................................................................................................................................................................

PATHDESCRIPTIONS.........................................................................................................................................................................

PATHCALCULATIONS

........................................................................................................................................................................

PATHPROFILES..................................................................................................................................................................................

TERMSANDCONDITIONS..........................................................................................................................................................

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GENERAL

STATEMENT OF WORK

The following report summarizes the results of a microwave path survey conducted by Aviat Networks, Santa Clara,California, for Delta Wireless Incorporated and Merced County. Field survey work was performed in November 2013,

by Rich Weiland.

The survey was undertaken to verify site locations and determine antenna sizes and centerlines required to establish amicrowave communications system in conformance with customer requirements and current engineering practices.

SURVEY PROCEDURES

Preliminary path profiles will be drawn based on the supplied site coordinates and contour information extracted fromthe best available topographic mapping. A field site survey will be conducted to verify site coordinates and elevationsbased on North American Datum 1983 (NAD83) and gather information related to the proposed radio equipment andantenna locations, site access, and site development constraints. A field path survey will be conducted to verify pathprofile elevations, measure all natural and manmade potential obstructions and assess the reflective potential of allnatural and manmade surfaces. Antenna centerline heights will be calculated for the proposed frequency band byapplying suitable clearance criteria based on the propagation characteristics of the geographic area.

Path calculation sheets will then be generated for each hop, based upon the recommended centerline heights.Antenna sizes and the choice of propagation protection diversity will be chosen to meet the required fade margin andthe desired path propagation reliability. Propagation outage and reliability calculations will be based on the Vigantsmodel (ref. Space Diversity Engineering, BSTJ, 1/75).

DESIGN CRITERIA

Path clearance criteria must be established for each path on the basis of total system performance objectives,economic considerations, and careful analysis of local atmospheric conditions derived from published climatologicaldata, where available, and reported microwave transmission experience pertinent to the area. Antenna heights muchgreater than actually needed cause an unwarranted increase in system cost, and on paths with significant ground

reflections, it can increase the exposure to multipath and ground reflection signal fading. It is desirable to locate theantennas high enough so that even under severe super-standard atmospheric refractive conditions (surface ducting)there is adequate clearance such that signal entrapment does not significantly degrade the fade margin of the path orgenerate excessive multipath fade activity. The choice of clearance criteria for a microwave path is a balance betweencost and performance.

The path clearance criterion as applied to a given geographic area is a function of the degree and direction ofatmospheric beam bending and can conveniently be defined by the equivalent earth radius K factor:

RadiussEarthActual

RadiussEarthEffectiveK

'

'

The Median Propagation value of K = 4/3 allows the normal microwave horizon to be slightly extended when

compared to the optical horizon; however, under certain meteorological conditions (for example, during nighttimesuper-refractivity usually associated with temperature inversions) the value of K increases to 2 or greater for periods ofseveral minutes to several hours. This increases the path clearance and results in the heavy multipath fade activityseen on some reflective paths and antenna decoupling power fading on others.

CLEARANCE CRITERIA

The criteria used to design a radio path in this region are the greater of:

Main to Main:o 100% first Fresnel zone radius over K=4/3, oro 60% first Fresnel zone radius over K=1

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Main to Diversity:o 60% first Fresnel zone radius over K=4/3 (Not Applicable)

MICROWAVE PATH PERFORMANCE CALCULATIONS AND WARRANTIES

The microwave path design models most frequently employed within the industry (e.g., Vigants, and ITU PN-530)

provide a reasonably accurate (and therefore usually guaranteed) estimate of the cumulative time a path will be out ofservice due to random atmospheric multipath fading under normal atmospheric conditions. These models do not(and cannot ) accommodate abnormal, unusual, anomalous, or otherwise unpredictable conditions of weatheror atmospheric refractivity.

MICROWAVE FREQUENCY ENGINEERING / INTER-SYSTEM INTERFERENCE ANALYSIS

Aviat Networks will partner with Comsearch, a CommScope company, to provide cost-effective frequency planningand FCC licensing services for radio communications systems (if required). The planning software used, considersspecific operating parameters of both the proposed microwave system and the environment microwave systems(license and proposed) to properly consider the interference potential of the new path or system. Parameters and dataelements incorporated into the modeling include, but are not limited to, antenna type, antenna height, elevation,antenna radiation pattern, receiver filter performance, terrain, radio modulation, path orientation, receiver threshold,etc. These elements are required to accurately predict specific interfering levels into and from the existing microwave

systems. The accuracy of the calculations is ensured by real time maintenance of the Comsearch point-to-pointmicrowave, earth station, radio equipment, antenna, interference objective, and contact database.

MICROWAVE FREQUENCY SELECTION

The interference analysis performed on the microwave system identifies available frequencies considering existingand proposed systems found in the Comsearch database. When applicable, an analysis of the systems in the adjacentbands can be done to ensure the microwave system does not receive unwanted threshold degradation. In bandsshared with satellite systems, an analysis of potential interference with earth stations and with the geo-stationarysatellite orbit can also be done. Additionally, co-located or nearby transmitters already licensed in the requiredfrequency band can be identified in order to reduce the possibility of bucking an existing high/low frequency plan thatcould increase the possibility of receiver overload or reflective interference from a nearby system.

MICROWAVE FREQUENCY COORDINATION AND FCC LICENSING

The majority of microwave bands subject to FCC Rule Part 101 require prior coordination with existing licensees. AviatNetworks will partner with Comsearch to perform the frequency coordination and FCC licensing on behalf of thecustomer (if required). The procedure will include notification of the technical parameters of the proposed system to allexisting and proposed licensees in the area and frequency band of operation. Frequency coordination will also beperformed with Canadian and Mexican authorities in border areas when necessary. By FCC rule, recipients are given30 days to respond, or in some cases an expedited response can be requested.

Upon completion of the prior coordination process, documentation required to satisfy FCC Rule Part 101.103 (d) canbe prepared on behalf of the customer. This will include any necessary exhibits, including Supplemental Showingsrequired upon submittal of the requested license application. The FCC filing process includes:

Filing of the FCC Form 601 microwave application upon written approval from the customer and providing anelectronic copy of the application to the customer via email.

Tracking the status of the application until the license is granted by the FCC. Amendments will be handledexpeditiously on behalf of the customer for any questions or concerns from the Commission.

Notification to the licensee via email when the license is granted by the FCC.

Filing of the required Completion of Construction notification with the FCC upon written approval from thelicensee and notification of the filing via email.

SPECIAL CONSIDERATIONS

On all microwave radio paths traversing urban areas there exists the possibility of multiple on- and off-path structuralreflections which generate long-delayed echoes, as well as terrain scatter RF intra- and inter-system interference.Long delayed, low-level echoes have no effect on digital radio performance; however, the terrain scatter mechanismcannot be accurately predicted nor precisely measured without an extensive and expensive field trial. Consequently,

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this mechanism is specifically excluded from all current industry-wide path survey and frequency coordinationperformance guarantees.

The structure supporting the microwave antenna can take many forms. The antenna is most often mounted on atower, but can be mounted on a variety of structures such as roof tripods, penthouse wall, wooden telephone pole ormetal monopole. It is recommended that the customer or end user conduct a structural analysis of the supportstructure to determine if the structure will support the additional loading imposed by the antenna and its mount. Thestructure must also meet the twist and sway requirements per EIA/ANSI 222G.

Certain geographic areas / frequency bands are restricted due to Radio Astronomy use or DOD and other Governmenttop-secret installations. Even outside the absolute exclusion zone, there are areas where 18 GHz can be cleared byDOD. Coordinators must file applications and wait for the FCC to contact NTIA and NTIA to contact IRAC to analyzethese before FCC licenses are granted. If the application is rejected, the proposed microwave link could be subject toredesign with another frequency band.

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LIST OF SITES AND PATHS

SITES (in the order they appear in this report):

Castle Dispatch Mt. Bullion

Pacheco

PATHS (in the order they appear in this report):

Castle Dispatch Mt. Bullion

Castle Dispatch Pacheco

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SYSTEM INFORMATION

SYSTEM DESCRIPTION

Merced County is adding a new node to its microwave network, to add a new dispatch center, Castle Dispatch. Twonew microwave hops will be installed to provide connectivity to it.

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Pacheco

MtBullionStateSite

CastleDispatch

ISSUE

ENGNAME

DATE

A

GL

05-14-2013

AviatNetworks

Deltawireless

MercedCounty

SystemLayout

ENG

BY:GL

REV0

.0

D A T E

0 5 1 4 2 0 1 3

SCALE:

LEGEND:

0

5

10

15

miles

IRU600v2L6128QAM

6.2

GHz,

100T1(155MBit/s)

MHS-SD

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Topo USA 6.0

Data use subject to license.

2006 DeLorme. Topo USA 6.0.

www.delorme.com

TN

MN (13.5E)

0 4 8 12 16 20

0 6 12 18 24 30

mikm

Scale 1 : 700,000

1" = 11.05 mi Data Zoom 8-210


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AviatNetworks

AviatNetworks

D

eltawireless

Microwave

SystemSummary

17-Dec-2013/Sheet1of1

TRAN

SMITSITENAME

CORRESPONDING

PATHI.D.

DISTANCE

PRIMARY

DIVERSITY

DOME

PRIMARY

DIVERSITY

RA

DIOTYPE

CAP

XMIT

RSL

S

LOPE

TRANSMIT

COMMON

RECEIVESITE

ANTENNA

ANTEN

NA

TRANS

TRANS

PWR

TOPOF

EQUALIZER

ONLYPAD

PAD

COOR

DINATES

AZIMUTH

SIZE/

SIZE

/

LINE

LINE

CON

FIGURATION

(dBm)

RACK

TRUE

HEIGHT

HEIGHT

LENGTH

LENGTH

(dBm)

ELEVATION(ft)

(ft)

(ft)

(ft)

(ft)

NORTH

FR

EQ(GHz)

Castle

Dispatch

LA

T:37-22-8.4

LO

N:120-34-12.6

EL

EV:172.0

Pacheco

DWMC-1

38.35mi

6.0/120.0

4/8

0

244.14

___

180.0

140.0

IRU

600v2L6

128QAM

MHS-SD

6.175

100T1(155MBit/s)30.5

-41.2

STD

___

___

MtBullionStateSite

DWMC-2

31.80mi

6.0/135.0

4/9

5

68.80

___

195.0

155.0

IRU

600v2L6

128QAM

MHS-SD

6.175

100T1(155MBit/s)30.5

-40.2

STD

___

___

MtBu

llionStateSite

LA

T:37-32-4.3

LO

N:120-1-49.1

EL

EV:4252.0

CastleDispatch

DWMC-2

31.80mi

6.0/75.0

4/3

5

249.13

___

195.0

155.0

IRU

600v2L6

128QAM

MHS-SD

6.175

100T1(155MBit/s)30.5

-40.2

STD

___

___

Pache

co

LA

T:37-7-29.0

LO

N:121-11-42.6

EL

EV:2355.0

CastleDispatch

DWMC-1

38.35mi

6.0/85.0

4/4

5

63.76

___

150.0

110.0

IRU

600v2L6

128QAM

MHS-SD

6.175

100T1(155MBit/s)30.5

-41.2

STD

___

___

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SITE INFORMATION Castle Dispatch

SITE DESCRIPTION

Note: Site coordinates are verified by referencing the tower location to landmarks andreference points that are depicted on the USGS 7 minute topo maps for the area. GPSreadings may also be used to supplement the USGS topo data. Field verified groundelevations and/or site coordinates may differ from frequency coordinated/FCC licensesvalues. This is due to matching of existing ASR/FCC licenses where applicable.

Field Verified SiteCoordinates, NAD 83

ASR,NAD 83

FCC LicensedCoordinates, NAD 83

37 22 8.4 N N N

120 34 12.6 W W W

Elev: 175 ft 53.3 m Elev: ft m Elev: ft m

Street Address: Apron Ave, 200ft E of Int Apron Ave and 6th

St Tower Registration Number: n/a

City: AtwaterCounty: MercedState: CA

Tower Considerations: Tower Structure: Existing New

Tower Type: Guyed Self Supporting Monopole Rooftop Water tankOther: _____________________

The proposed mounting structure is a 160 self-supporting, three leg tower. The tower is to be owned by Merced County. Thelocation of the proposed tower is near the partially excavated site where the conduits emerge. Due to the path to Mt. Bullionpassing over the control tower for Castle Airport, coordinates were taken for an alternate Castle Dispatch tower location, southeastacross the parking lot, near the existing generator.

The coord inates for the alternate Castle Dispatch tower site are: 37 22 7.6 N, 120 34 11.9 W, elevation 175 feet.

At the alternate tower site, the centerlines to Mt. Bullion can be lowered by 60 feet, but I recommend centerlines of 90 feet for themain antenna and 50 feet for the diversity antenna, just to stay above potential clutter such as new structures and trees nearby thatmay grow into a lower path.

For the Castle Dispatch Pacheco hop, the centerlines can be lowered by only 5 feet, due to a bit lower tree along the path nearCastle Dispatch that the alternate path passes over. The centerlines for the alternate tower site are then 115 feet for the mainantenna and 75 feet for the diversity antenna.

Antenna Mounting Considerations for each path: Path to Mt. Bullion: The main antenna should be installed at a centerline of 135 ft, and the diversity antenna should be installed

at a centerline of 95 ft.o

Centerline: 135 ft. main, 95 ft diversity.o Azimuth: 68.8

o

o Tilt Angle: 1.184o

Path to Pacheco: The main antenna should be installed at a centerline of 120 ft, and the diversity antenna should be installedat a centerline of 80 ft.

o Centerline: 120 ft. main, 80 ft diversity.o Azimuth: 244.2

o

o Tilt Angle: 0.381o

Transmission Line Considerations for each path: Path to Mt. Bullion: The length of waveguide is estimated to be 195 ft.

Customer Supplied Site

Coordinates, NAD 83 N W

Elev: ft m

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Path to Pacheco: The length of waveguide is estimated to be 180 ft.

Cable Ladder: Use Existing Recommended Not Required

Cable Bridge: Use Existing Recommended Not Required

Ice Bridge: Use Existing Recommended Not Required

Entry Ports: Use Existing New Entry Port Required

Ground Bus Bar: Use Existing New Bus Bar Required

Site Access Considerations:Locked gate to parking lot where planned tower is to be located.

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Topo USA 6.0



www.delorme.com

TN

MN (13.5E)

0 200 400 600 800 1000

0 100 200 300 400 500

ftm

Scale 1 : 12,800

1" = 1,066.7 ft Data Zoom 14-014


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SITE PHOTOS

Proposed location for the new 160 foot, three-leg tower at Castle Dispatch. The path drive for both proposed hopswere completed with this as the assumed site. The paths were also driven to collect data for the alternate tower siteidentified in a later picture.

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Another view of the proposed tower location.

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View toward Mt. Bullion from ground level. The path from the proposed tower location passes over the airport controltower.

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View toward Pacheco from ground level.

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Location of alternate tower site, at the opposite side of the parking lot, near the existing generator. Data from the pathdrives for this location allow for lower centerlines for the hop to Mt. Bullion, because the path no longer passes overthe airport control tower.

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SITE INFORMATION Mt. Bull ion

SITE DESCRIPTION

Note: Site coordinates are verified by referencing the tower location to landmarks andreference points that are depicted on the USGS 7 minute topo maps for the area. GPS

readings may also be used to supplement the USGS topo data. Field verified groundelevations and/or site coordinates may differ from frequency coordinated/FCC licensesvalues. This is due to matching of existing ASR/FCC licenses where applicable.


ASR,NAD 83


37 32 4.3 N N N

120 01 49.1 W W W

Elev: 4250 ft 1294 m Elev: ft m Elev: ft m

Street Address: Atop Mount Bullion Tower Registration Number:n/aCity: Mariposa

County: MariposaState: CA



The mounting structure is a 160 self-supporting tower. The four-leg tower is under construction, with 120 feet of structurecompleted, and two, 20-foot monopole-type sections to be stacked on top. The tower is owned by the State of California.

Antenna Mounting Considerations for each path: Path to Castle Dispatch: The main antenna should be installed at a centerline of 75 ft on the southwest leg of the tower, and

the diversity antenna should be mounted at a centerline of 35 feet..o Centerline: 75 ft for the main antenna, and 35 ft for the diversity.o Azimuth: 249.1

o

o Tilt Angle: -1.56o

Transmission Line Considerations for each path: Path to Castle Dispatch: The length of waveguide is estimated to be 195 ft.




Entry Ports: Use Existing New Entry Port Required

Ground Bus Bar: Use Existing New Bus Bar Required

Site Access Considerations: none

Customer Supplied SiteCoordinates, NAD 83

N W

Elev: ft m

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Topo USA 6.0



www.delorme.com

TN

MN (13.5E)

0 600 1200 1800 2400 3000

0 200 400 600 800 1000

ftm

Scale 1 : 25,000

1" = 2,083.3 ft Data Zoom 13-021


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SITE PHOTOS

View of Mt. Bullion with location of proposed antennas toward Castle Dispatch shown.

To Castle Dispatch,mount main antenna at75 ft, azimuth 249.1

o,

tilt -1.56o, on the

southwest tower leg.

To Castle Dispatch,mount diversityantenna at 35 ft,azimuth 249.1

o, tilt

-1.56o, on the

southwest tower leg.

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Reverse azimuth view of Mt. Bullion from the Castle Dispatch direction. The existing tower to the left is being replacedby the new tower, and will be removed. The paths for the two proposed antennas on the new tower will pass justabove the two lower right existing antennas.

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View toward Castle Dispatch from ground level.

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View inside the equipment room with the location in the existing frame for the microwave radio shown. The breakerpanel and lower radio may need to be moved a bit, to allow mounting the microwave radio near the top of the frame, toavoid the need for a rigid waveguide extension.

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Proposed route for waveguide.

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Interior view of ports. The ports need to accommodate two waveguides in each.

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Exterior view of ports.

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View of waveguide run toward new ice bridge. These existing feedlines are running to the other tower at the site.

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View of new ice bridge.

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View of far end of new ice bridge.

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View of end of ice bridge and cable ladder up tower.

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Cable ladder up tower.

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SITE INFORMATION Pacheco

SITE DESCRIPTION

Note: Site coordinates are verified by referencing the tower location to landmarks andreference points that are depicted on the USGS 7 minute topo maps for the area. GPS

readings may also be used to supplement the USGS topo data. Field verified groundelevations and/or site coordinates may differ from frequency coordinated/FCC licensesvalues. This is due to matching of existing ASR/FCC licenses where applicable.


ASR,NAD 83


37 07 29.1 N 37 07 29.2 N N

121 11 42.7 W 121 11 42.2 W W

Elev: 2380 ft 724 m Elev: 2380 ft 724 m Elev: ft m

Street Address: Pacheco Pass Tower Registration Number:1274185City: Santa Nella

County: MercedState: CA



The mounting structure is a four-leg, self-supporting tower, Three, 20-foot tower extension sections are to be added to the existingtower, for a total height of 130 feet. The steel for the extension is on the ground in the compound. The tower is owned by DavidField.

Antenna Mounting Considerations for each path: Path to Castle Dispatch: The main antenna should be installed at a centerline of 85 ft on the southeast leg of the tower, and

the diversity antenna should be mounted at a centerline of 45 feet..

o Centerline: 85ft. for the main antenna, and 45 ft. for the diversity.o Azimuth: 63.8

o

o Tilt Angle: -0.834o

Transmission Line Considerations for each path: Path to Castle Dispatch: The length of waveguide is estimated to be 150 ft.




Entry Ports: Use Existing New Entry Port Required Ground Bus Bar: Use Existing New Bus Bar Required

Site Access Considerations:Locked gate.

Customer Supplied SiteCoordinates, NAD 83

N W

Elev: ft m

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Topo USA 6.0



www.delorme.com

TN

MN (13.6E)

0 600 1200 1800 2400 3000

0 200 400 600 800 1000

ftm

Scale 1 : 25,000

1" = 2,083.3 ft Data Zoom 13-035


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SITE PHOTOS

View toward Castle Dispatch from ground level.

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View of Pacheco tower, with the proposed tower extension and antennas to Castle Dispatch shown.

To Castle Dispatch, mountmain antenna at 85 ft,azimuth 63.8

o, tilt -0.834

o,

on the southeast tower leg.

To Castle Dispatch, mountdiversity antenna at 45 ft,azimuth 63.8

o, tilt -0.834

o,

on the southeast tower leg.

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View inside the equipment room with the location of the frame for the microwave radio shown.

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Proposed route for waveguide.

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Interior view of ports and ground block.

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Interior view of ports.

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Exterior view of ports.

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Waveguide run.

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Waveguide run.

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Waveguide run.

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Waveguide run.

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Waveguide run.

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PATH INFORMATION: Castle Dispatch Mt. Bull ion

PATH DESCRIPTION

Path Length: 31.8 MilesFrequency Band: 6 GHz

General Path Description:

Path Description:

This is a long path, with a difference of over 4000 ft in elevation between the sites. The control point along this path isa building 900 feet from the proposed Castle Dispatch tower site, the 98 foot tall control tower for the Castle Airport.The vegetation along this path is a mix of tree types, of heights between 20 and 75 ft. A tree growth factor of 10 ft wasadded to accommodate expected future growth.

Path Climate Considerations:

Heightened humidity gradients provide additional signal paths through the atmosphere between radio sites whichresult in varying degrees of composite destructive and sometimes constructive interference at the receiving antenna.Space diversity is successfully deployed as a countermeasure against this atmospheric, refractive multi-path fadingphenomenon but it does not provide much mitigation against harsher phenomenon that also occur in this region suchas beam spreading, blackout fading/ducting and antenna decoupling, the latter of which is due to elevated incidentsignal arrival angle due to very high K factor path trajectory refractive bending. There are a number of designapproaches that can help mitigate these harsher effects. One is to simply deploy relatively short path lengths. Theeffects are still there but theyre reduced to a manageable level. The second is to deploy high-low path trajectorieswith a minimum of 6 milliradians (roughly degree) of inclination angle. This path has an inclination angle of about1.2 degrees, and should perform well.

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FINAL

0

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2800

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3600

4000

4400

0

2

4

6

8

10

12

14

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18

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30

31.8

E L E V A TION (ft)

DISTANCE(miles)

TerrainRoughness:867.6

CastleDispatch

MtBullio

nStateSite

NAD83

NAD83

SiteN

ame:

LatitudeN:

LongitudeW:

ElevationAMSL:

Cente

rlinesAGL:

Refer

enceMap:

Field

Verified:

SiteName:

LatitudeN:

LongitudeW:

ElevationAMSL:

CenterlinesAGL:

ReferenceMap:

Engineer:

ID:DWMC-2

F

req=6.1

75GHz

17-Dec-2013

Deltawireless

AviatNetworks

AviatNetworks

MercedCounty =

1.0

0F1@

K=

1.3

3

......

=0.6

0F1@

K=

1.0

0

--.

=06

0F1@

K=

13

3

135.0

/95.0

ft

75.0

/35.0

ft

GL

37

22'8.4

"N

120

34'12.6

"W

37

32'4.3

"N

120

01'49.1

"W

172.0

ft

4252.0

ft

49


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-

Aviat Networks

Aviat Networks

Path Loss and Fade Margin Calculations

For Line-of-Sight Microwave SystemsVersion 5.0.0

Date: 14-May-2013Customer/Project: Delta wireless - Merced County Rev. Date: 06-Dec-2013Path ID: DWMC-2 Engineer: GL

Equipment Type: IRU 600 v2 L6 128QAM Capacity: 100 T1 (155 MBit/s)Protection Type: Space Diversity Frequency: 6.175 GHz (FCC)

Band Width: 30 MHz 60/6X Static -

Site Name: Castle Dispatch Mt Bullion State Site

NAD83Latitude:

Longitude:37 22 ' 8.4 " N 37 32 ' 4.3 " N

120 34 ' 12.6 " W 120 01 ' 49.1 " WElevation: 172.0 ft 4252.0 ft

Azimuth: 68.80 249.13

Path Length: 31.80 miFree Space Loss: 142.46 dBAtmospheric Absorption: 0.45 dBDiffraction Loss: 0.00 dBTransmission Line Type: Elliptical Elliptical

Transmission Line Length: 195.00 ft 195.00 ftTransmission Line Loss: 2.30 dB 2.30 dBTransmit-Only Pads: 0.00 dB 0.00 dBJumper / Flex Loss: 0.27 dB 0.27 dBMain Antenna Radome Loss: 0.00 dB 0.00 dBTransmitter ACU Loss: 0.40 dBReceiver ACU Loss: 0.00 dBMisc/Common Line Pads: 0.00 dB 0.00 dB

TOTAL LOSSES: 148.46 dB

Antenna Size: 6.0 ft 6.0 ftAntenna Centerline: 135.0 ft 75.0 ftAntenna Gain: 38.9 dB 38.9 dB

Antenna Type: HP6-59 HP6-59Effective Radiated Power (EIRP): 66.4 dBm 66.4 dBmTransmitter Power, GUARANTEED: High Power (30.5 dBm)

TOTAL GAINS: 108.3 dB

Unfaded Received Signal Level: -40.2 dBm (+/- 2dB)Required Level For 10-6 BER: -72.0 dBmFlat Fade Margin: 31.8 dBDispersive Fade Margin: 49.0 dBComposite Fade Margin: 31.8 dBDiversity Improvement Factor: 16.2Multipath Outage Probability: 0.000005346

Multipath Outage: 51.6 sec/year Percent Reliability: 99.99984 %

c = X = w =0.26 1.0 140.0 ( Vigants 1975 ) Temperature = 60.0 FDiversity Spacing: 40.0 ftDiversity Antenna Size/Type: 4.0 ft / PL4-59 4.0 ft / PL4-59Diversity Centerline: 95.0 ft 35.0 ft

Slope Equalizer? Std

Unfaded Receive Signal Level ( at radio/transmission line interface ): -40.2 dBm (+/- 2dB)

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PATH INFORMATION: Castle Dispatch Pacheco

PATH DESCRIPTION

Path Length: 38.4 MilesFrequency Band: 6 GHz

General Path Description:

Path Description:

This is a long path, with a difference of over 2100 ft in elevation between the sites. The control point along this path isa line of trees 0.5 miles from the proposed Castle Dispatch tower site, where the trees were measured at 75 feet. Thevegetation along this path is a mix of tree types, of heights between 20 and 90 ft. A tree growth factor of 10 ft wasadded to accommodate expected future growth.

Path Climate Considerations:

Heightened humidity gradients provide additional signal paths through the atmosphere between radio sites whichresult in varying degrees of composite destructive and sometimes constructive interference at the receiving antenna.Space diversity is successfully deployed as a countermeasure against this atmospheric, refractive multi-path fadingphenomenon but it does not provide much mitigation against harsher phenomenon that also occur in this region suchas beam spreading, blackout fading/ducting and antenna decoupling, the latter of which is due to elevated incidentsignal arrival angle due to very high K factor path trajectory refractive bending. There are a number of designapproaches that can help mitigate these harsher effects. One is to simply deploy relatively short path lengths. Theeffects are still there but theyre reduced to a manageable level. The second is to deploy high-low path trajectorieswith a minimum of 6 milliradians (roughly degree) of inclination angle. This path has an inclination angle of about0.4 degrees, and should perform adequately.

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FINAL

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E L E V A TION (ft)

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TerrainRoughness:484.1

CastleDispatch

Pacheco

NAD83

NAD83

SiteN

ame:

LatitudeN:

LongitudeW:

ElevationAMSL:

Cente

rlinesAGL:

Refer

enceMap:

Field

Verified:

SiteName:

LatitudeN:

LongitudeW:

ElevationAMSL:

CenterlinesAGL:

ReferenceMap:

Engineer:

ID:DWMC-1

F

req=6.1

75GHz

17-Dec-2013

Deltawireless

AviatNetworks

AviatNetworks

MercedCounty =

1.0

0F1@

K=

1.3

3

......

=0.6

0F1@

K=

1.0

0

--.

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3

120.0

/80.0

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GL

37

22'8.4

"N

120

34'12.6

"W

37

07'29.0

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121

11'42.6

"W

172.0

ft

2355.0

ft

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-

Aviat Networks

Aviat Networks

Path Loss and Fade Margin Calculations

For Line-of-Sight Microwave SystemsVersion 5.0.0

Date: 14-May-2013Customer/Project: Delta wireless - Merced County Rev. Date: 06-Dec-2013Path ID: DWMC-1 Engineer: GL

Equipment Type: IRU 600 v2 L6 128QAM Capacity: 100 T1 (155 MBit/s)Protection Type: Space Diversity Frequency: 6.175 GHz (FCC)

Band Width: 30 MHz 60/6X Static -

Site Name: Castle Dispatch Pacheco

NAD83Latitude:

Longitude:37 22 ' 8.4 " N 37 07 ' 29.0 " N

120 34 ' 12.6 " W 121 11 ' 42.6 " WElevation: 172.0 ft 2355.0 ft

Azimuth: 244.14 63.76

Path Length: 38.35 miFree Space Loss: 144.09 dBAtmospheric Absorption: 0.55 dBDiffraction Loss: 0.00 dBTransmission Line Type: Elliptical Elliptical

Transmission Line Length: 180.00 ft 150.00 ftTransmission Line Loss: 2.12 dB 1.77 dBTransmit-Only Pads: 0.00 dB 0.00 dBJumper / Flex Loss: 0.27 dB 0.27 dBMain Antenna Radome Loss: 0.00 dB 0.00 dBTransmitter ACU Loss: 0.40 dBReceiver ACU Loss: 0.00 dBMisc/Common Line Pads: 0.00 dB 0.00 dB

TOTAL LOSSES: 149.47 dB

Antenna Size: 6.0 ft 6.0 ftAntenna Centerline: 120.0 ft 85.0 ftAntenna Gain: 38.9 dB 38.9 dB

Antenna Type: HP6-59 HP6-59Effective Radiated Power (EIRP): 66.6 dBm 67.0 dBmTransmitter Power, GUARANTEED: High Power (30.5 dBm)

TOTAL GAINS: 108.3 dB

Unfaded Received Signal Level: -41.2 dBm (+/- 2dB)Required Level For 10-6 BER: -72.0 dBmFlat Fade Margin: 30.8 dBDispersive Fade Margin: 49.0 dBComposite Fade Margin: 30.8 dBDiversity Improvement Factor: 10.7Multipath Outage Probability: 0.000017888

Multipath Outage: 172.6 sec/year Percent Reliability: 99.99945 %

c = X = w =0.26 1.0 140.0 ( Vigants 1975 ) Temperature = 60.0 FDiversity Spacing: 40.0 ftDiversity Antenna Size/Type: 4.0 ft / PL4-59 4.0 ft / PL4-59Diversity Centerline: 80.0 ft 45.0 ft

Slope Equalizer? Std

Unfaded Receive Signal Level ( at radio/transmission line interface ): -41.2 dBm (+/- 2dB)

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TERMS AND CONDITIONS

PATH ENGINEERING/

TRANSMISSION ENGINEERING

When Aviat Networks performs reliability calculationsor path studies (path profiles from mapping or digitizeddata only) based solely on information supplied by oron behalf of the Customer, these calculations andstudies are provided solely for budgetary purposes andshall not be construed as or be used for an installabledesign.

When conducting a path survey, Aviat Networks willverify site coordinates and ground elevations, andrecord trees and man-made fixed obstructions on thepath. This information will be recorded on the profile forthat particular path. Aviat Networks will assign an

appropriate growth factor to tree heights.

When Aviat Networks performs frequency planningbased, in part, on data provided by the Customer atthe time of the study, Aviat Networks will not beresponsible for any interference case that arises due toerrors or omissions in such data. As the usage ofmicrowave bands increase and there is more sharingwith satellite services, it may be necessary to performfrequency interference studies and additional pathsurveys (to determine blockage) to alleviate thepossibility of interference from satellite earth stations.

Warranty of Path Engineering ServicesAviat Networks warrants that the installed radiocommunication path will conform to Customersmultipath performance reliability objectives when AviatNetworks has performed the path survey,recommended the path design, and Aviat Networkshas implemented such recommendations. Thiswarranty is for a period of 15 months from the dateof the survey or one year from the date ofinstallation of the microwave path, whicheverexpires first. All Aviat Networks field activities and

path propagation analysis will utilize current hardware,software, and engineering practice and judgment withthe goal of meeting normal Path Loss, as defined inTIA/EIA Standard RS-252-A.

Aviat Networks is not responsible for paths that it doesnot survey, nor for changes in path design beyondthose specifically allowed in the path survey report orin writing after the field survey is completed, includingbut not limited to:

Any change in path design;

Any movement in site locations;

Any building or other structure built on-path afterdate of survey;

Any disturbance of the terrain which may causeblockage or reflection;

Any additional frequency interference source;

Any change of available antenna mounting spaceon tower.

Any one or more of the changes listed on page one willnullify this warranty, and the Customer shall in suchcase bear the total cost of determining that suchchange was the cause.

Aviat Networks will not be responsible for degradedpath performance when such degradation is due tosuch anomalous propagation conditions as:

Long-term loss of fade margin due to antennadecoupling misalignment caused by widely-varyingk-factor changes;

Long-term loss of fade margin due to AtmosphericBoundary Layering (ABL) causing wavefrontdefocusing (beam spreading), signal entrapment(blackout fading), ducting, and other suchoccurrence.

Path Engineering Services

Aviat Networks will perform radio path surveys and pathcalculations to determine the normal path loss and antennaheights as defined in TIA/EIA Standard RS-252-A

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Excessive rain outage rates beyond the publishedcrane and/or chart data used in the calculation;

Degradation resulting from certain types ofmultipath interference attributed to unidentifiableoff-path terrain features or structures;

Any other technological or atmospheric condition

not foreseeable through the exercise of prudentengineering knowledge and judgment.

Additionally, Aviat Networks will not be responsible fordegraded path performance when:

Non-Aviat Networks radio equipment is installed ona surveyed path;

Aviat Networks radio equipment is not installed byAviat Networks;

Existing antenna and waveguide system is usedwithout test and inspection performed by AviatNetworks.

Aviat Networks designs the microwave path basedupon best engineering practices and standardscommon to the industry, and it selects a transmissionconfiguration based upon the most economical methodfor meeting the path performance objectives. Whenpath loss or reliability objectives are not achieved,exclusive of anomalous propagation or path changesas described above, then Customers sole remedy,and Aviat Networks exclusive liability in connectionwith path engineering, shall be that Aviat Networks willprovide incremental labor and material to optimize theantenna system beyond what would have beenrequired during initial installation.

Where anomalous propagation is suspected in aninstalled microwave path, Aviat Networks will work withthe Customer to obtain reasonable evidence that suchcondition exists. The total retroactive costs for suchstudy shall be the responsibility of the Customer with

Aviat Networks providing in-office engineering support.The cost of relocating towers, antennas, passivereflectors or other measures required to remedy thistype of problem shall solely be the responsibility of theCustomer.

LimitationsThe foregoing warranties are in lieu of all otherwarranties whether oral, written, expressed, implied, orstatutory. In particular, THE IMPLIED WARRANTIES

OF FITNESS FOR PARTICULAR PURPOSE ANDMERCHANTABILITY ARE HEREBY DISCLAIMED andshall not be applicable, either from Aviat Networks orany other equipment or software manufacturer. AviatNetworks warranty obligations and Customersremedies thereunder are solely and exclusively asstated herein. IN NO CASE SHALL AVIATNETWORKS BE LIABLE FOR INDIRECT KINDS OFDAMAGES, INCLUDING BUT NOT LIMITED TOSPECIAL, INCIDENTAL, AND CONSEQUENTIALDAMAGES, OR LOSS OF CAPITAL, REVENUE, ORPROFITS. In no event shall Aviat Networks liability tocustomer, or any party claiming through Customer, bein excess of the actual sales price paid by Customerfor any service supplied to Customer by AviatNetworks.

Path Survey Report Merced Rel 1

Documents

Transcript of Path Survey Report Merced Rel 1