Smart Com 450 Manual English V5_14

7/24/2019 Smart Com 450 Manual English V5_14

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Becker Smart Com 450 Leaky FeederTraining Manual

V5.14


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0.1 150 MHz or 450 MHz?

Smart Com 150 is well suited for hard-rock mines wherelateral coverage from the LF cable is not critical.

Smart Com 450 is better suited to room and pillar or

longwall mines as the signal propagates up to 4x better.

UHF cable costs approximately 300% more than VHF,however the increased coverage may result in a moreattractive solution.


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Table of Contents

1.0 Two-Way Radio Basics

2.0 Leaky Feeder Concept

3.0 RF Power Measurement

4.0 System Layout

5.0 Splitter Installation6.0 Amplifier Spacing

7.0 Base Station Installation

8.0 LF Cable Installation

9.0 Passive Component Installation

10.0 Amplifier Installation

11.0 DC Supply Installation12.0 Troubleshooting

13.0 Maintenance

Contact Information


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1.0 Two-Way Radio Basics

1.1 Two-Way Radio

1.2 Simplex Radio System

1.3 Half-Duplex Radio

1.4 Leaky Feeder is.?

1.5 Real Time Communications


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1.1 Two-Way Radio

VHF/UHF Radios are available as stationary (base),hand-held (portable), vehicle-mounted (mobile),integrated with cap lamp batteries or radio-modem (dataapplications).

Radios support multiple channels and can be configuredto interface with telephone systems.

Trunked voice radio is cost-competitive when 200 ormore radios are used on-site. Trunked systems alsoprovide private voice conversations.


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1.2 Simplex Radio System

Transmit (TX) and Receive (RX)

frequencies are the same.

UHF is a good choice for room &

pillar type mines.

Line of sight communication (LOS):

VHF

150 MHz TX

150 MHz RX

UHF

455 MHz TX

455 MHz RX

VHF

150 MH

z TX

150 MHz RX

UHF

455 MHz TX

455 MHz RX


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1.3 Half-Duplex Radio

Mountain

Radio #1150 MHz RX

170 MHz TX

Obstructions or extreme distances between the radios will

prevent simplex radio from working. To remedy this a

Repeater is added to create a half duplex communication

network.

PTT

Repeater

170 MHz RX150 MHz TX

Radio #2

150 MHz RX170 MHz TX


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1.4 Leaky Feeder is?

Leaky Feeder cable runs along tunnels and emits and

receives radio signals. The cable is leaky since it has

gaps or slots in its outer shielding to allow signal to leak

into or out of the cable along it's entire length.

Radio Transmit

170 MHz VHF

455 MHz UHF

Radio Receive

150 MHz VHF

475 MHz UHF


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1.5 Real Time Communications

Leaky Feeder acts like a long antenna, connecting Radios

to Repeaters.


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2.0 Leaky Feeder Concept

2.1 Leaky Feeder Highway

2.2 Leaky Feeder RF Spectrum

2.2.1 Smart Com 150 Band pass

2.2.2 Becker Smart Com 150 Band pass

2.2.3 Smart Com 450 Band pass2.3 Data - Smart Com + Ethernet

2.4 Data - Low Speed, Mine-Wide Data


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2.1 Leaky Feeder Highway

Leaky Feeder is analogous to a

divided, multi-lane highway.

A single highway (cable) carriesseveral lanes of traffic

(channels) in opposite directions

(band-pass) with a median

(guard band) between them to

prevent collisions.


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2.2 Leaky Feeder RF Spectrum

Guard Band

Downstream

Downstream channels

are connected directly to

Repeater transmitter,thus all channels are at

same strong RF power.

Downstream channels

drive Local Diagnostic

LEDs.

Upstream Upstream signals are

at different RF power

depending (mainly)

on distance between

U/G radio and LF

cable

Base Station & Repeaters

Frequency


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2.2.3 Smart Com 450 Band pass

Gu

ardBand

Base Station & Repeaters

Frequency

Downstream

Voice

475-480

Upstream

Voice

450-455RFPower

Note: Opposite to Smart Com 150, Smart Com 450 Upstream is the lower frequency.

UpstreamEthernet

20-42 MHz

DownstreamEthernet

140-185 MHz

8 Channels Voice/Data

Upstream signals are at

different RF power

depending (mainly) on

distance from cable.

8 Channels Voice/Data

All Downstream radio

signals are at same RF

power


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Smart Com 450 Band pass

450-455 MHz

475-480 MHz

Downstream Signals

Upstream Signals


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2.3 Data Smart Com + Ethernet

Connect industry standard cable modems to

Smart Com to provide 54 Mbps Ethernet

hotspots.

Connect standard Ethernet equipment includingwireless networking equipment.

CMIIP Camera

PC

VOIP Handset

Cable

Modem

WLAN

SP2

Non-Intrinsically Safe

equipment


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2.4 Data Low Speed, Mine-Wide Data

1. Low-speed (9600 bps) wireless networks can run over Leaky Feeder.

2. Master Radio Modem in Base Station is connected to main PC/PLC.

3. Slave units are connected to PLCs or RTUs.


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3.0 RF Power Measurement

3.1 Relative Measurements

3.2 Decibels: dB and dBm

3.3 Gain and Loss using dBs

3.4 dBs and Power


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3.1 Relative Measurements

Temperature units are C.

Reference level is 0 C.

All temperatures are relative,

the numbers just indicate

higher/lower than reference

level of 0 C.

+25C

0 C

-25C


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3.2 Decibels: dB and dBm

dBs are ratios of RF power levels that simplify

calculations of RF loss and gain.

Calculating power level differences in dB works

just like calculating temperature differences inC.

dBm is a measurement of the absolute power,

not a power ratio. Power can be expressed as

Watts, dBm and volts, but dBm and dBs worktogether to make things easy. No kidding.


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3.3 Gain and Loss using dBs

-4 dBm -0 dBm = -4 dB

100 meters of Smart Com

150/150IS Leaky Feedercable has 4 dB loss.

Input RF power 0 dBm Output RF power -4 dBm

What is RF loss through 100 m LF cable?

Input RF power -20 dBm

Output RF power +4 dBm

What is the gain of the LF amplifier?

Gain or loss is the difference between output and input indBm and the result is expressed in decibels (dB).

+4 dBm (-20 dBm) = +24 dB

Leaky Feeder amplifier provides

24 dB gain.


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3.4 dBs and Power

Decibels are logarithmic. Increasing a signal by 3 dB

doubles the power, decreasing a signal by 3 dB cuts the

power in half. An increase of 10 dB is 10x the power.

-10 dB -6 dB -3 dBGain/

Loss+3 dB + 6 dB +10 dB

-10 dBm -6 dBm -3 dBm 0 dBm 3 dBm 6 dBm 10 dBm

1/10 1/4 1/2 Power 2x 4x 10x


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4.0 System Layout

4.1 Base Station Location

4.2 LF Cable Layout

4.3 System Layout Example

4.4 Smart Com 150 Gains/Losses4.5 Smart Com 150IS Gains/Losses

4.6 Smart Com 450 Gains/Losses

4.7 Smart Com 150IS System Layout

4.8 Smart Com 150IS System Notes


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IS Systems:

Must be installed on surface (Safe Area).

Non-IS Systems:

Non-IS Systems can benefit from the Base Stationinstalled underground as all four Head End branches

may be used. This reduces the requirement for U/G

DC supplies and also provides a form of redundancy.

Another benefit of U/G Base Stations is that it

reduces the number of amplifiers in cascade and

thus the noise floor.


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4.2 LF Cable Layout

LF cable must be installed wherever communications is

required.

Allow for 10% extra cable when laying system out to

accommodate for drip loops and cable slack. Each cable run must be terminated by either a

Termination Unit or Stope Antenna.

Stope Antennas increase coverage by up to 200-300%

to provide coverage into stopes and other areas where

cable damage is likely.


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4.3 System Layout Example


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4.6 Smart Com 450 Gains/Losses


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5.0 Splitter Installation

5.1 Smart Com 150/150IS SP2 Splitters

5.2 Smart Com 150/150IS SP3 Splitters

5.3 Smart Com 450 SP2 Splitters

5.4 Smart Com 450 SP3 Splitters


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5.3 Smart Com 450 SP2 Split ters

Smart Com 450 SP2 splitters split the power

into two equal branches.

100%

50%

50%2

1Input

SP2

>OUT: -4 dB

-70m/-230ft

>OUT: -4 dB

-70m/-230ft

IN>

3m

280m

210m-70m

-70m

-70m

-70m

210m

+350m


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5.4 Smart Com 450 SP3 Split ters

33%

33%

Smart Com 450 SP3 splitters have all higherloss branches.

100%SP3

33%

1

3 2

Input

>OUT: -7 dB

-120m/-395ft

>OUT: -7 dB

-120m/-395ft

>OUT: -7 dB

-120m/-395ftIN>

3m

230m

-120m

-120m-120m

230m

230m

+350m


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6.0 Amplifier Spacing


6.2 500m vs 350m Spacing

6.3 150/150IS Amplifier Spacing, Example 1


6.5 150/150IS Amplifier Spacing, Example 36.6 150/150IS Amplifier Spacing, Example 4


6.8 450 Amplifier Spacing, Example 1





6.13 Smart Com 150/150IS Amplifier Spacing Quiz


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Line Amplifiers are installed to compensate for cable andsplitting losses.

Maximum

Amplifier

Gain (dB)

Amplifier

Spacing

Cable Loss at

highest

frequency

Reserve

Gain (dB)

Smart Com

150/150IS

(RNG-AMP,

RIS-AMP, BSC-

AMP)

28 500 m

1650 feet

23 dB/500 m 5

Smart Com 450

(450-AMP)

25 350 m

1150 feet

21 dB/350 m 4

RNG-AMP and RIS-AMP line amplifiers require first amplifier oneach Head End branch be spaced 350 m from Head End! BSC-

AMP amplifiers can be spaced 500m from head end.


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6.2 500m vs 350m Spacing

All other LF systems have 350 meter amplifier spacing.

500 meter spacing

Smart Com 150/150IS.

350 meter spacing

Smart Com 450.

All other LF competitors.


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6.8 450 Ampl if ier Spacing, Example 1

3m

280 meters

3m

+350 Meters

+350 Meters

3m

210 meters

210 meters

230 meters

230 meters

230 meters

450-AMP

450-AMP

450-AMP


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6.9 450 Ampl if ier Spacing, Example 2

3m

280 meters+350 Meters

3m

160 meters

160 meters

160 meters

450-AMP

450-AMP


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100m


3m

60 meters

60 meters

60 meters

450-AMP

450-AMP


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3m


100m60 meters

60 meters

60 meters

450-AMP

450-AMP


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100m


100m-40 meters

-40 meters

-40 meters

450-AMP

450-AMP


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7.0 Base Station Installation

7.1 What is a Base Station?

7.2 Typical Smart Com 150 Base Station Schematic


7.4 Smart Com 150 Base Station RF Flow

7.5 Leaky Feeder Head End

7.6 Smart Com 150 Head Ends

7.6.1 RNG-Hxx Head End

7.6.2 BSC-HE Head End

7.6.3 RNG-Hxx Head End Indications and Controls

7.6.4 BSC-HE Head End Indications and Controls7.6.5 RNG-Hxx RF Distribution

7.6.6 BSC-HE RF Distribution

7.6.7 RNG-Hxx Remote Diagnostic Connections

7.6.8 BSC-HE Remote Diagnostic Connections

7.6.9 Smart Com 150 Downstream RNG-Hxx

7.6.10 Smart Com 150 Downstream BSC-HE

7.6.11 Smart Com 150 Channel Plan

7.7 Smart Com 450 Head End7.7.1 Smart Com 450 Head End Indications

7.7.2 Smart Com 450 RF Distribution

7.7.3 Smart Com 450 Remote Diagnostics


7.8 Base Station Power Supplies

7.9 Voice Repeaters

7.10 Telephone Interconnects


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7.1 What is a Base Station?

Its the brains of the Leaky Feedernetwork, housed in a 19 rack-mountcabinet.

Inside the Base Station are theinterfaces to the Leaky Feeder network:

Leaky Feeder Head End RF Distribution

Power Supplies

Radio Repeaters, surface coverageantennas

CMTS

CMTSI (RNG-Hxx head end only if needed)

Server PC

Mine Pager Phone Interconnect

Telephone Interconnect


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Base Stations for Intrinsically Safe systems needto be on surface (Safe Area).

Dry, heated area with reliable, clean AC power.

If located outdoors a climate controlled NEMA4/4X enclosure is required.

Base Station should be placed so that access toboth front and rear doors is possible.

LF cables can enter Base Station cabinetthrough top of cabinet or through access panelon bottom of cabinet. Cable glands required tomaintain NEMA rating of cabinet.


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7.5 Leaky Feeder Head End

The Head End is the interface between Base

Station equipment such as Repeaters and the

Leaky Feeder cables.

The Head End unit also injects DC power ontothe Leaky Feeder cable to power the LF Line

Amplifiers.


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7.7 Smart Com 450 Head End

Front View, 3U high

The Smart Com 450 system head end provides connection to8 Tx/Rx channels. The head end does not pass DC voltage

onto the Leaky Feeder network or provide pre-amplification.

Insertion Loss

CMTS Upstream (20-42 MHz) 14 dB

CMTS Downstream (140-185 MHz) 14 dB

Voice Upstream (450-455 MHz) 22 dB

Voice Downstream (475-480 MHz) 35 dB


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7.7.1 Smart Com 450 Head End Indications

Downstream

LED should

always be ON.

These LEDs can be

used to calibrate a

single Tx channel at atime, all other Tx ports

must be properly

terminated during the

test.

Front panel LEDs

show the remote

diagnostics state.

Downstream LED

ON = Pilot ON,

Upstream LED ON= Amplifier data

being received.

Enclosure Front LEDs

Enclosure Back LEDs

Once the Tx channel

is connected, adjust

the signal level so

the green OK LED is

lit.

High LED: > 31 dBmOK LED: = 28 dBm

LO LED: < 28 dBm


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7.7.2 Smart Com 450 RF Distribution

Voice: 30 dBm

Voice Repeater Transmit ter

Voice: -5 dBm Pilot: -25 dBm

CMTS Downstream: -21 dBm CMTS Upstream: -23 dBm

Rack Mount ServerCMTS

Down: -9 dBm

Up: -39 dBm RS232


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7.7.3 Smart Com 450 Remote Diagnostics

Ensure Downstream Pilot is

active (front panel LEDs).

Connect serial crossover cable

between the Head End and the

server PC running the Remote

Diagnostic software.

Server polls each amplifier in the

system.

Remote Diagnostics

Connection


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7.8 Base Station Power Supplies

13.8 VDC, 40 Amp redundantsystem (2 x 20A supplies).

Battery terminals to create

UPS. In-line fuse required

between battery and P/S

(supplied with RNG-BAT).

Voltage & Current Meter.

CSA certified.

Not CE certified.

PS-110, PS-220

PS-UNIV-CE CSA Certified.

CE certified.

Requires UPS.


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7.9 Voice Repeaters

One voice repeater is required for each voice channel.

Typically supplied by Varis Distributor.

RNG-RPT1

(one channel)

RNG-RPT5(two channel)


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7.10 Telephone Interconnects

INT-TEL-CE

INT-TEL

Telephone Interconnects connect a PABX telephone

line to a LF radio channel. Enables one non-private telephone connection per

connected channel.

Radios must be equipped with DTMF keypads to

access the Telephone Interconnect. Typically

supplied by Varis

Distributor


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8.0 LF Cable Installation

8.1 LF Cable Installation Drift

8.2 LF Cable Installation Shaft

8.3 IS Leaky Feeder Installation

8.4 VHF LF Cable & Tools

8.5 UHF LF Cable & Tools

8.6 RNG-500 LF Cable Preparation

8.7 RCF12-50 LF Cable Preparation

8.8 Smart Com 150 Component Connection



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8.5 UHF LF Cable & Tools

Smart Com 450 uses RCF12-50LF cable.

50 ohm impedance.

Copper coated aluminumcenter conductor, corrugated

copper jacket. Cable reel sizes tbd,

depending on reel length.

Installation requires:

Hacksaw

RFS12-L cable preparationtool (pictured)


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8.7 RCF12-50 LF Cable Preparation

Cut the cable with ahacksaw.

Follow RFS TRIM-12-L cablepreparation tool instructions.

Optionally, slide on heatshrink tubing.

Install screw-on N-Typeconnector.

Optionally, apply heat toshrink tubing to sealconnector.


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Amplifier and Splitter

connectors markedHEADENDmust be

connected to LF

cable coming from

Head End.

Torque nut to 1 Nm (8 inch-

lbs). Specific SMA-Type

torque wrenches available

from Tessco for connections.

Optionally, waterproof

connector with Heat Shrink.


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9.0 Passive Component Installation

9.1 System Impedance

9.2 Two-way Splitter Installation

9.3 Three-way Splitter Installation

9.4 Termination Unit Installation

9.5 Stope Antenna Installation

9.6 Splice Unit Installation

9.7 Smart Com 150IS Barrier Unit Installation


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9.1 System Impedance

Smart Com 150/150IS systems

characteristic impedance is 75 ohms.

Smart Com 450 systems characteristicimpedance is 50 ohms.

This impedance difference means you

cannot mix Smart Com 150/150IS and

Smart Com 450 components or cable in asingle network!


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9.2 Two-Way Splitter Installation

Smart Com 150/150IS Splitters have jumpers thatcan:

Terminate an unused/damaged branch.

Inject RF Only for runs of LF with noamplifiers so that short circuits in the LF cablewill not bring down the system.

RNG-SP2

UHF-SP2

1 2

H/E

Equivalent

LF cable

lengths

(loss) of

splitter

branches

Smart

Com

150/

150IS

Smart

Com

450

Branch 1, 2 100 m

(325)

70 m

(230)

1

2

H/E

RIS-SP2

H/E 1

2


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9.3 Three Way Splitter Installation

RNG-SP3

1

23

UHF-SP3

1

2

3

H/E

H/E

Equivalent LF cable lengths

(loss) of splitter branches

Smart Com

150/150IS

Smart Com

450

Branch 1 100 m (325) 120 m (395)

Branches 2 & 3 200 m (650) 120 m (395)

RIS-SP3

H/E

3

1

2


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9.4 Termination Unit Installation

Termination Units arerequired at the end ofeach LF cable to absorbRF signals, preventingreflections and deadzones.

RNG-TER

UHF-TERRIS-TER


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9.6 Splice Unit Installation

Splice Unit is used for cable

repairs.

RNG-SPL

RF LossSmart Com 150/

150IS

RNG-SPL

RIS-SPL

0.1 dB, 0 m

Smart Com 450

UHF-SPL

0.1 dB, 0 mUHF-SPL

RIS-SPL


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10.0 Amplifier Installation

10.1 Smart Com 150 Amplifier Installation

10.2 Smart Com 150IS Amplifier Installation

10.3 Smart Com 450 Amplifier Installation

10.4 The 3 Meter Rule

10.5 Amplifier Gain Control10.6 Smart Com 150 Amplifier Local Diagnostics

10.7 Smart Com 450 Amplifier Local Diagnostics

10.8 Smart Com 150 Amplifier AGC

10.9 Smart Com 450 Amplifier AGC

10.10 Smart Com 150 Amplifier Manual Gain Control


10.12 Smart Com 150 Amplifier Remote Diagnostics



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10.3 Smart Com 450 Ampli fier Installation

450-AMP

HEADENDterminals connectto the LF cablecoming from the

Base Station.

RF Level

Jumper is to select the

amplifiers mode, Automatic

or Manual. Automatic is

recommended.

Rotary switch

adjusts Gain if in

manual mode

Used to calibrate in

Manual gain mode.

Amplifier ID


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10.5 Amplifier Gain Control

Amplifiers compensate for the RF (Radio Frequency) cable

and splitting losses in the cable run preceding it in the

Downstream direction.

AmplifierGain

RF High

RF OK

RF Low


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10.7 Smart Com 450 Ampli fier Local Diagnostics

Any LED lit means DC voltageOK.

Amber LED indicates pilot level is

too high. Green LED indicates pilot level is

OK. Green OK LED thresholdsare AGC or MGC-Calibrated: -4 to-6 dBm, MGC with Calibrate PB

not pressed: -3 to -7 dBm. Red LED indicates pilot level is

too low.

If there is no Pilot active then the Red (Low) LED

will be on.


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10.9 Smart Com 450 Amplif ier AGC

Set to Auto mode

Verify green LED is on. Amplifier continues to

monitor Downstream

signals and adjust gain as

required to maintain OK.

Automatic gain control (AGC) is the recommended

setting. Set jumper JU16 to AUTO.


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Ensure Pilot is ON.

Depress CALIBRATE p/b.

Turn SW1 until green OK

LED is on.

The dial indicator on SW1

shows the dBs of extra

gain available.


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Amplifier is polled bythe RD webserver

Poll rate is

determined by the

number of amplifiers

in the system.

The remote

diagnostic web server

also provides

functionality toreprogram the

amplifier firmware

remotely.

All RF Leds light when a

Remote Diagnostics

packet is sent


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11.0 DC Supply Installation

11.1 Smart Com 150 DC Supply

11.1.1 Smart Com 150 DC Supply Installation

11.1.2 Smart Com 150 DC Supply Upgrade

11.1.3 Smart Com 150 DC Supply Spacing

11.2 Smart Com 150IS DC Supply

11.2.1 150IS DC Supply Installation

11.2.2 150IS DC Supply Spacing

11.2.3 150IS DC Supply Layout

11.2.4 150IS DC Voltage Calculation


11.3.1 450 DC Supply Spacing


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Power supply has an output voltage of 16 VDC.

A Power Coupler UHF-DPC is supplied witheach DC Power Supply to tie it into the LFnetwork. Use LF cable between coupler and DC

Supply. The RF loss for the coupler is < 0.5 dB and

therefore does not affect amplifier spacing.

Amplifiers must be no further than four amplifiersaway from the DC supply.

Local Diagnostic LEDs

UHF-DC16 UHF-DPC


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11.3.1 450 DC Supply Spacing

Maximum of 8 amplifiers (4 in each direction) per

booster


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12.0 Troubleshooting

12.1 Troubleshooting Strategy12.2 Smart Com 150 Quick Reference Guide

12.3 Becker Smart Com 150 Quick Reference Guide

12.4 Smart Com 150/150IS Remote Diagnostics

12.5 Smart Com 150/150IS Amplifier Local Diagnostics

12.6 Smart Com 450 Remote Diagnostics12.7 Smart Com 450 Amplifier Local Diagnostics

12.8 Mine-Wide Failure

12.9 Area Failure

12.10 Short Circuit Repair

12.11 Base Station Testing

12.12 Upstream Band

12.13 Noisy Upstream Band

12.14 Downstream Band

12.15 Noisy Downstream Band


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12.1 Troubleshooting Strategy

Remote Diagnostics is key in detecting faults and seeing

what is going on in the system.

Comments from users are very useful in determining

what type of problem is occurring.

70% of all failures are due to cable and water damage.

Upstream noise and failed DC power supplies account for

the remaining 30% of problems.

Always start troubleshooting at the Head End. Start on

the branch with the reported fault, and work your waytowards the end of that branch.

Show DRX Help


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12.6 Smart Com 450 Remote Diagnostics

Verify DRX

web server

communication

-3 to -7

OK Reserve

Gain

Depends on

the number of

amplifiers inthe system

There

should beno alarms.


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12.7 Smart Com 450 Ampli fier Local Diagnostics

RF LED

Indication

DC

Status/LED

RF Status Acti on

No LEDs Failed, below

minimumvoltage

Unknown Determine why DC voltage is low:

No incoming voltage check for cable short/open or DC Power Supply failure.

Red LED

(PreviousAmplifier OK)

OK (any LEDlit indicated

DC voltageOK)

Too Low Downstream Pi lot:

Ensure that downstream pilot is on at the head end.

Otherwise, increased cable loss (addition of splitter, cable damage) may require more gain fromamplifier.

Manual Gain Control (MGC)

Decrease Attenuation Setting switch SW1 until Green OK LED On. For more accuracy, press and

hold Calibrate button while adjusting SW1.

Otherwise, if adjusting MGC does not achieve Green LED, then cable damage or new splitterprevents Green LED On even with 0 (zero) attenuation.

Find and repair cable damage.

If new splitter installed, amplifier will show Red LED, but otherwise system performance will beunchanged.

Green LED OK OK None

Amber LED

(PreviousAmplifier OK)

OK (any LEDlit indicated

DC voltageOK)

Too High Manual Gain Control (MGC)

Increase SW1 until Green OK LED on. For more accuracy, press and hold Calibrate button whileadjusting SW1.

If problem persists:

Ensure that amplifiers are not spaced too closely

Ensure that an amplifier is not oscillating due to cable being bundled too closely.


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12.8 Mine-Wide Failure

Possible Cause Remedy

Base Station un-powered. Verify Base Station power.

Failure of main LF cable

feed.

Verify using Remote or Local Diagnostics.

If amplifiers cannot call in within 15

minutes it would indicate a problem.Upstream noise floor too

high.

Verify using Remote Diagnostics. If

amplifiers cannot call in within 15 minutes

it would indicate a problem. Measure

Upstream Noise Floor.

Failure of DC Power Supply. Verify using Remote or Local Diagnostics.If amplifiers cannot call in within 15

minutes it would indicate a problem.

Failure of Voice Repeater. Confirm operation of other voice channels.


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12.9 Area Failure

Possible Cause Remedy

Failure of LF cable feed. Verify using Remote or Local Diagnostics.

If amplifiers cannot call in within 15 minutes

it would indicate a problem.

Failure of DC Power

Supply.

Verify using Remote or Local Diagnostics.

If amplifiers cannot call in within 15 minutes

it would indicate a problem.

Amplifier or cable fault. If amplifier cannot achieve Green LED then

either the amplifier is faulty or cable

between it and previous amplifier has toohigh a loss. Verify amplifier spacing and

replace amplifier.


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12.10 Short Circuit Repair

Short Circuits cause the DC voltage to drop while the DC current increases.

How to detect Short Circuits

Low voltage alarms on Remote Diagnostics.

Fault LEDs on DC Supplies.

Higher than normal current draw from DC Supplies. DC Supply output current hiccupping.

No LEDs on amplifiers (DC voltage below minimum voltage).

Too Low Red LEDs on amplifiers (RF level too low due to cable damage, cable open but notshorted).

How to locate Short Circuits

Use information from Remote Diagnostics. Which sections of amplifiers are not calling in?

Start from DC Supply, and temporarily isolate cable sections using jumpers on splitters andamplifiers. Using a voltmeter, watch for increase in voltage (to normal) when branch isolated.

Once the faulty cable section has been identified, perform a visual check of the cable looking forobvious physical damage. If possible feel cable for damage.

How to repair Short Circuits

Repair broken cable with splice units.

Replace damaged cable sections with new cable.

12 11 B St ti T ti


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12.11 Base Station Testing

Smart Com 150/150ISConnect a Spectrum Analyzer to a spare Rx port on RNG-

RF16 or the BSC-HE. Monitor the Upstream band 170-185

MHz.

Spectrum Analyzer

Smart Com 450

Connect a Spectrum Analyzer to a spare Rx port on UHF-H00. Monitor the Upstream band 450-455 MHz.

12 12 U t B d


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12.12 Upstream Band

The Upstream band should look as shown below.

U t B d


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Upstream Band

Its possible that you can hear

someone talking but not be able to

talk back. This indicates a problem

with the upstream communications.

12 13 N i U t B d


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12.13 Noisy Upstream Band

If noise is coming back to the Base Station from any or allof the LF branches it might look similar to below.

12 14 D t B d


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12.14 Downstream Band

Its possible that someone can hear

you but you cannot talk back. This

indicates a problem with the

Downstream communications.

12 15 N i D t B d


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12.15 Noisy Downstream Band

Connect spectrum analyzer to the LF terminals at the Head

End.

13 0 Maintenance


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13.0 Maintenance

13.1 Daily Maintenance

13.2 Monthly Maintenance

13.3 Annual Maintenance

13 1 Daily Maintenance


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13.1 Daily Maintenance

Use Remote Diagnostics (RD) each day.

Check for warnings and alarms.

The RD web server can be configured to send e-mail

when alarms are detected.

RD gives confidence in the system.

RD is easy to use, does not require a dedicated

computer and can support up to 50 simultaneous users.

13 2 Monthly Maintenance


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13.2 Monthly Maintenance

1. Confirm Base Station operation:

1. Repeater transmitter levels

2. Clarity of voice communications

3. Noise in Upstream direction below -90 dBm

4. Head End circuit board Local Diagnostic LEDs OK5. Verify backup batteries in place and on float charge

2. Test line components:

1. Amplifier and DC Supply Local Diagnostics LEDs OK

2. Verify backup batteries in place and on float charge

3. Verify minimum 30 meters communication range fromcable throughout mine.

13 3 Annual Maintenance


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13.3 Annual Maintenance

It is advised to perform a system audit on anannual basis. The audit verifies:

1. Remote Diagnostics configuration up to date withinstalled system.

2. Repeater sensitivity.3. Repeater transmit power and stability.

4. Head End splitter/combiner operation.

5. Downstream and Upstream noise floor.

6. Amplifier DC voltage and output levels.

7. Communication coverage and clarity, includingsurface.

Contact Information


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Contact Information

Varis Mine Technology Ltd.

22 Brady Street, Unit 4

Sudbury, Canada P3E 6E1

[email protected]

Toll Free USA/Canada: 877-658-2747

Phone: 705-674-8111

Fax: 705-674-7834


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Documents

Smart Com 450 Manual English V5_14