Radio Mobile Software RF Surveys - Data-Linc Group

friendlybathMobile - Wireless

Nov 12, 2013 (3 years and 7 months ago)

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Field Proven Performance



Industrial Grade Support

DATA
-
LINC GROUP

Radio Mobile RF Site Surveys

2

Topic Choices

Introduction

Maps & Pictures

Unit Properties

Networks Properties

Resolve Paths

Generate Reports

Tips & Examples

Closing Comments

1.


Preliminary Design

2.


Software RF Study

3.


On
-
site Survey

4.


Feasibility Review

5.


Implement Project

Steps

3


Radio Mobile is freeware software


Written by a radio amateur Roger
Coude
’ (9VE2DBE)
for radio amateurs


Operates from 20MHz to 20GHz


Based on Irregular Terrain (Longley
-
Rice) propagation
model


Is intended for longer distance outdoor applications


Download and information at:

http://www.cplus.org/rmw/english1.html


Radio Mobile User Group:

http://groups.yahoo.com/group/Radio_Mobile_Delu
xe/



Radio Mobile Software

4

Radio Mobile Screen

5


Data can be accessed online or purchased


Elevation Data


SRTM (Shuttle Radar Topography Mission)


DTED, GTOPO30, GLOBE, BIL


Street maps


Tiger, OpenStreetMap…


Images and ground cover


Landsat, Terraserver, Toporama, Land Cover…

Elevation & Map Merges

6


Topological data is available for most of the world


List of sources:
ttp://www.cplus.org/rmw/dataen.html


Shuttle Radar Topography Mission (SRTM)


Info and data from Jet Propulsion
Laborary
:

http://www2.jpl.nasa.gov/srtm/


Data is freely available via FTP:

ftp://e0srp01u.ecs.nasa.gov/srtm/


The FTP site is heavily used and is taken down for
maintenance on Wednesday nights


Various resolutions (1 and 3
arcsec
, others…)


There are some “holes” where data are not
available

SRTM Elevation Maps

7


Site locations


Latitude/Longitude coordinates


Acceptable antenna elevations above ground


Radio specifications (Radiosys.dat)


Transmitter


Receiver


Antenna and coax


Network design criteria


Line Of Sight (LOS)


Fade Margin

User Provided Information

8


For ISM bands (900MHz, 2.4GHz, 5.8GHz) and RF
paths less than 50km:


Rainfall is not a consideration


Climate setting = Continental temperate


May not be valid for air to ground applications


Typically for 1km+ distances



Longley
-
Rice ITS

9


Check for web update under Help


Confirm Radiosys.dat contains Data
-
Linc radio
systems (File…Networks Properties…Systems)

Confirm Radio Mobile Configuration

10


Application information


Obtain site coordinates and useable antenna heights


Identify the master site(s)


Identify the preferred wireless product


Using Radio Mobile


Prepare maps and map pictures


Enter Unit (site) Properties


Define and analyze “All Masters” Network


Resolve RF path issues


Prepare Site Survey report

Site Survey Steps

Prepare Map and Picture Merges

12


Estimate Lat/Lon for map center (master site?)


Estimate map size in km and display size


Set Options…Internet for SRTM data and region


Define the Elevation Data Source

13

SRTM USA 1
Arcsecond

Regions

14


File…Map properties…

Define Map Properties

15


File…Picture properties to

suit your needs…

Picture Properties

Gray scaled

Colored Slope

Rainbow

16


Edit…Merge Pictures…

Streets and Other Map Merges

Internet Tiger
-

USA

Unit Properties

18


Build the map first so
unit elevation can be
extracted from the
map


File…Unit properties



Notice a unit can be
placed at the cursor
position on the map

Entering Unit (Site) Information

19


Coordinates can be entered as:


47
°

34’ 21”


47
°

34.35’


47.5725


An example coordinate units converter:

http://www.jeepreviews.com/wireless
-
gps
-
coordinates/



Entering LAT/LON Coordinates

Define Network(s)

21


Radio Mobile can be used for applications with a
single network of two radios to multiple networks
of many radios


A SRM master with several slaves can be a
network


A repeater with attached slaves can be another
network


A “system” is a radio, antenna, coax, lightning
arrestor, connectors, etc.

What is Network and System?

22


This will be the starting point for analysis


For the “All Masters” network


Set RF band frequencies


Set network topology (typically voice)


Set the Systems (radio, antenna, coax combinations)


Set RF path style based on Rx Relative (fade margin)


Add units (members) to the network and


Set role to master


Choose a system (use omni antenna at this point)


If known set antenna elevation AGL


Build an “All Masters” Network

23


File…Networks Properties…

Networks Parameters

24

Networks Topology

25

Networks Systems

26

Networks Membership

27

Networks Style

Resolve RF Paths

29


Objective here is to minimize your time and labor
by quickly determining path issues and
application feasibility


Requires “All Masters” network

Objective & Requirements

30


Use the Radio Link Tool


Filter paths using Networks…Styles


Tools…Network Report


Consider possibilities


Change unit system (antenna sub
-
system)?


Adjust unit elevation AGL?


Different wireless product?


Other repeater sites?


Mixed wired/wireless solution?


Formulate a solution plan


Basic Activities

31


Possibly create a network for the master and
each repeater


Assign units to appropriate network(s)


Multiple RF links from master and repeaters to a unit
(site) is desirable (alternate paths)


Caution: Antenna height and system (ant/coax/radio)
for the same site are not linked in each network


Set unit’s role in network (master/repeater/slave)


Adjust antenna elevation AGL, System type
(
omni
/yagi/coax) for each unit


Repeat previous steps until satisfied

Implement the Plan

32

Radio Link Tool

Generate Report

34


Report details based on feasibility and survey
funding


Quick and minimal


Thorough and complete


Reports are often the foundation for on
-
site
surveys

Reporting Comments

35


MS Word report template


Screen capture software such as Snagit or Paint
Shop Pro


Radio Mobile:


Pictures


RF path cross
-
section screen captures


Network report


Data
-
Linc parts list


Findings summary and possible concerns

Report Generation Tools

Tips & Examples

37


Using Google Earth


When a radio will be mounted at antenna
elevation adjust unit elevation to keep coax short


Other Features and Tips

38


Desired Radio: SRM7210E?


Site Details:


Master

36
°
01'12"N

087
°
53'57“W


40ft


N Tank

36
°
06'12"N

087
°
47'01“W


100ft


TH Tank

36
°
04'35“N

087
°
47'46“W


75ft


CR Tank

36
°
03'42"N

087
°
54'47“W


100ft


CC Tank

36
°
05'24“N

087
°
46'31“W


75ft


PS1

36
°
05'06"N

087
°
47'08“W


10ft


IS Tank

36
°
05'08"N

087
°
47'46"W


60ft


Heights are Above Ground Level (AGL)

Example Network 1

39


Desired Radio: PLR5000


Site Details:


Master


43
°
39'42"N

116
°
16'25“W 10m


Repeater 1

43
°
40'52“N

116
°
14'29“W 15m


Repeater 2

43
°
40'18“N

116
°
13'49“W 20m


PS 1


43
°
41'26"N

116
°
14'44“W 4.5m


PS 2


43
°
40'42"N

116
°
13'58“W 10m


PS 3


43
°
40'22"N

116
°
11'53“W 15m


Example Network 2

40


Prefer SRM6000 radios


Antenna elevations not to exceed 30 feet


Site Details:


Master


38
°
12'07"N

120
°
41'21“W


HWY 49


38
°
12'08"N

120
°
41'42“W


SunSet


38
°
11'32"N

120
°
41'20“W


OakShadows

38
°
11'08"N

120
°
39'42“W


WT1


38
°
11'15"N

120
°
40'04“W

Example Network 3

Field Proven Performance



Industrial Grade Support

DATA
-
LINC GROUP

Thank You!