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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Alejandra Zuluaga Agosto 15 de 2012
RFoG Technology
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Laser
Transmitter EDFA
Return Path
Receiver
Downstream
Video FeedForward
Path 1550 or
1310nm
Hub
Optical
Distribution
Network (6
fibers)
Nodes of 256 - 1000 homes with
4 coax trunks
Return Path
1310 nm•Migrate to single fiber per node by adding WDM
•Remove amplifiers and RF Taps
•Shrink the HFC node and place one with each subscriber
•Take fiber to each home via taps and splitters
Customer
Premise
Coax with RF amplifiers
and RF taps
Micro
Node
Micro
Node
Micro
Node
Micro
Node
Traditional
Node
Passive Fiber
Splitters/Taps
Traditional HFC Architecture
Evolved
to RFoG Architecture
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
HFC-PON Comparison
RPR
Node
WDM
RPR
HFCRFoG
MicroNode
MicroNode
MicroNode
Headend / Hub Outside Plant Customer Premises
1550nm LaserTransmitter
CoreNetwor
k
CMTS
1550nm LaserTransmitter
Video/RF
Feeds
CoreNetwor
k
CMTS
~~ Power
Video/RF
Feeds
EDFA
EDFA
Splitter
Splitter
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Operation
WDM
1550 nmDownstream
1310 nm or 1610nmUpstream
1x32Splitter
MicroNode
Headend Outside Plant Customer Premises
Cable Modem
1310 nm or 1610nmUpstream
Single fiber supports both forward and return path One return path receiver port can be shared by 32 or more MicroNode
transceivers MicroNode operates upstream in “Burst Mode”
Upstream laser is “on” only during an RF burst from the cable modem or STB
Ingress and impulse noise is substantially reduced or eliminated entirely Allows recovery of lower 10MHz of upstream spectrum
IPApplication
Switch CMTS
STB
LaserTransmitter
EDFA
Return Path Receiver
Video, Voice & Data –
Combined Signal
VoiceNetwork
1550 nmDownstream
Many Names• MicroNode• RFoG ONU• R-ONU• NIU
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Improves SNR
DSFee
d
LaserTransmitter
NodeCMTS
ReturnReceiver
Tap
CM
STB
UnterminatedEndpoints
Splitter
(sums ingress noise)
EDFA
HFC SNR = 26dB
DSFee
d
LaserTransmitter
CMTS
ReturnReceiver
EDFA
Tap
CM
STB
UnterminatedEndpoints1 x n
Splitter
WDM
MicroNodeRFoG SNR = 34dB
Downstream Better Distance / Density
Low Noise Receiver 20Km range with 32 splits
Bandwidth to 1GHz
Upstream - Higher SNR than HFC Recovers 10MHz Lost to Ingress Noise Enables 64QAM upstream channel bonding
(27Mbps 108Mbps)
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Operation
WDM
1550 nmDownstream
1310 nmUpstream
1x32Splitter
MicroNode
Headend Outside Plant Customer Premises
Cable Modem
1310 nmUpstream
Single fiber supports both forward and return path One return path receiver can be shared by 32 MicroNode transceivers MicroNode operates upstream in “Burst Mode”
Upstream laser is “on” only during an RF burst from the cable modem or STB
Ingress and impulse noise is substantially reduced or eliminated entirely Allows recovery of lower 10MHz of upstream spectrum
IPApplication
Switch CMTS
STB
LaserTransmitter
EDFA
Return Path Receiver
Video, Voice & Data –
Combined Signal
VoiceNetwork
1550 nmDownstream
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Burst Mode Operation
1. CMTS schedules the Cable Modem to transmit data
MicroNode
MicroNode
MicroNode
Splitter
1
n
EDFA
RPR
1550nm Laser
Transmitter
Video/RF Feed
CMTS
CoreNetwork
WDM
1310nm
Cable Modem
Set Top Box
(STB)
5. CMTS proceeds to next scheduled device
2.Cable modem sends burst of data
3. MicroNode senses burst; turns on laser for duration of data
4. RPR receives data; sends it to CMTS
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Burst On-Time
Preamble Data
Cable ModemTransmission
MicroNodeTransmission
MicroNodeBurst begins within 1.22μS
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MicroNode TransmitterBurst Timing
Cable ModemTransmission
MicroNodeTransmission
Ramp-UpPhase Preamble
1.0 μS
220 nS
• 220nS into the Ramp Up Phase, the MicroNode laser transmitter begins to turn on
• Laser reaches “on” state 1.0 μS later
• Total response time =1.22 μS
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Laser ON/OFF Time forDOCSIS 3.0 Requirements
Fast Laser Turn On & Turn Off Times are Critical The device has to respond to cable modem burst rapidly to avoid loss of data DOCSIS 2.0 and DOCSIS 3.0 have 8-symbol ramp up and ramp down spec 8 symbols equates to ramp time of:
Ramp up
8 Symbols
Ramp Down
8 Symbols
Microseconds @ Symbol Rate of
1.6 5120 Ksym/Sec
3.2 2560 Ksym/Sec
6.4 1280 Ksym/Sec
12.8 640 Ksym/Sec
Standards-compliant RFoG ONUs Turn on / Turn Off times = 1.5 microsecond
MicroNode meets DOCSIS 2.0/3.0 maximum upstream timing
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Upstream Bandwidth Improvement
0 5 10 15 20 25 30 35 40
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HFC typical spectrum upstream
27MHz
MicroNode usable spectrum upstream = 37MHz
MHz
RFoG enables37% more usable RF upstream
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Downstream Bandwidth Improvement
0 50 100 500 600300 700 800
870
HFC typical spectrum downstream
50-870MHz
RFoG MicroNode downstream spectrum = 50-1100 MHz
MHz200 400 1000 1100
RFoG MicroNodes have28% more downstream BW
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MicroNode SNR
DSFee
d
LaserTransmitter
NodeCMTS
ReturnReceiver
Tap
CM
STB
UnterminatedEndpoints
Splitter
(sums ingress noise)
EDFA
HFC SNR = 26dB
DSFee
d
LaserTransmitter
CMTS
ReturnReceiver
EDFA
Tap
CM
STB
UnterminatedEndpoints1 x n
Splitter
WDM
MicroNodeRFoG SNR = 34dB
Downstream Better Distance / Density
Low Noise Receiver 20Km range with 32 splits
Bandwidth to 1GHz
Upstream - Higher SNR than HFC Recovers 10MHz Lost to Ingress Noise Enables 64QAM upstream channel bonding
(27Mbps 108Mbps)
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG NetworkArchitecture
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Network Architecture – 3 Elements
WDM
1550 nmDownstream
1310 nmUpstream
1x32Splitter
MicroNode
Headend Outside Plant
Customer Premises
Cable Modem
1310 nmUpstream
IPApplication
Switch CMTS
STB
LaserTransmitter
EDFA
Return Path Receiver
Video, Voice & Data –
Combined Signal
VoiceNetwork
1550 nmDownstream
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Headend Architecture
Return Path
Receiver
WDM1550nm
1310/1610nmUpstream
IPApplication
Switch CMTS
Video Inputs: - Off Air Analog or Digital - Satellite Source:
- Analog Tier -Transcoded Digital via QTM
VoIP Server
Local Content – Community Server
Internet Connection to the World
Single Strand Bi-Directional Fiber
1550nm Down 1310nm Up
To 1x32 splitter
All Downstream
Traffic
Return Path
Receiver
EDFALaser Transmitter
1550nm Downstream Optical1310nm Upstream; Voice, Data, STB SignalingEthernet (10/100/1000bT) or OpticalCoax
RFCombiner
RFoG
Multiple clusters of 32 MicroNodes can share a DOCSIS CMTS port as one logical “Node”
Return Path Receiver
OtherEDFAs
OtherODNs
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG ODN Architecture
WDM
Up to 32 Splits
Fiber Distribution Network
Fiber connectors/splitters Single fiber supports both
forward and return path Single mode fiber Point to multi-point design Indoor or outdoor passive
fiber splitters Cabinet shown, pedestals
also available
HeadendChassis Mount Coupler
Rack Mount Splitters
MicroNode
Fiber Network to the home
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoGFiber
Insid
e C
oax
Wir
ing
Ethernet, USB,or wireless
Regular telephone
wiring
MicroNode
Coax Brick Powering Not
Shown
Home Architecture - CPE
Customer Premise Equipment (CPE) with MicroNodes
Single fiber supports both forward and return path MicroNode provides optical to electrical conversion Media - “F” connector to 75 ohm coax cable Up to 1.1 GHz downstream & full spectrum
upstream NTSC & PAL bandwidth plans Analog and digital video Digital music Very high speed Internet traffic VoIP
Battery backup power (optional)
Spare ports available for other devices
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG Remote Hub
WDM1550nm
1310/1610nmUpstream
IPApplication
Switch
CMTS
Video Inputs: - Off Air Analog or Digital - Satellite Source:
- Analog Tier -Transcoded Digital via QTM
VoIP Server
Local Content – Community Server
Internet Connection to the World
Single Strand Bi-Directional Fiber
(1550nm Down 1310nm Up )To 32 users
Per fiber
All Downstream
Traffic
EDFA
Laser Transmitter
1550nm Downstream Optical1310nm Upstream; Voice, Data, STB SignalingEthernet (10/100/1000bT) or OpticalCoax 54-860MHz
RFCombiner
OtherRemote Hubs
Return Path
ReceiverReturn Path
ReceiverReturn Path
ReceiverReturn Path Receiver
Transmitter
Remote HUB 128 users, 256
HP
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Application Engineering&Configurations with MicroNodes
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
OSP Network256
Subscribers
RPR Headend Application
1550nm LaserTransmitter
RF Video Feed
Return Path Receiver
Headend
CMTS
1
32
STB
CM
OpticalSplitter1550 nm
1590 nm
WDM 1
32
STB
CM
1
32
STB
CM
1
32
STB
CM
1
256
EDFA
Return Path
Receiver
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Hub OSP Network256
Subscribers
RPR Hub Application
1550nm LaserTransmitter
RF Video Feed
Return Path ReceiverReturn Path
Receiver
Headend
WDM
CMTS
EDFA EDFA
1
64
STB
CM
OpticalSplitter1550 nm
1590 nm
WDM 1
64
STB
CM
1
64
STB
CM
1
64
STB
CM
1
256
Return Path Receiver
Return Path
Transmitter
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Optical Budget Considerations
For optimum future growth RFoG networks should be designed for PON compatibility ITU and IEEE PON standards focus on 20Km / 32&64 splits per fiber Allows future applications using CWDM wavelengths on the same fiber
network
26dB optical budget supports most configurations with
Connectors 32 splits 20Km reach
Typical loss parameters for MicroNode fiber plant:17.0dB splitter budget for 32 splits is standard 2.4dB for connector losses at 6 points (.4db / connector) 0.2dB for fusion splicing at 6 splice locations 1.5dB for 1590nm WDM coupler (1.4dB downstream @ 1550nm) 21.1dB total for splitter, splicing, connectors, WDM
4.4dB fiber loss - 20Km @ .22dB / Km = 4.4dB
25.5dB loss budget downstream and 25.5 db loss upstream
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG - 8.1 Km fiber example
ODN Component Loss (dB) Amount Loss (dB)Split ter (1:32) 17 1 17.0APC connectors 0.4 8 3.2Mechanical Splice 0.1 1 0.1Fusion Splice 0.02 6 0.1
20.4
WavelengthLoss
(dB/km) Length (km) Loss (dB)1310 nm (data up) 0.35 8.1 2.81490 nm (data down) 0.27 8.1 2.21550 nm (video down) 0.22 8.1 1.8
WavelengthClass
(ITU.G983.1)Total Loss
(dB)1310 nm B 23.31490 nm B 22.61550 nm B 22.2
Fibre G.652C/D
ODN Loss
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
EDFA Considerations
• EDFA– Erbium-Doped Fiber Amplifier– Amplifies optical signal without conversion to electrical– Provides constant output power over wide range of input levels– Typically used as a multi-port distribution amplifier in a hub or headend
• RFoG Applications– One EDFA can support up to 16ea 20km optical networks– Headend – directly feed each optical network– Remote hubs - use a single fiber using WDM couplers from headend to EDFA at remote hub site
• Optimizes fiber utilization• Reduces costs
– Buy high power EDFA only when needed, or– Use 1:n splitters to get more output ports from a single port of a high-power EDFA
• Network Engineering Considerations– EDFA input levels should be above 0dBm
• +3dBm delivers optimal SNR
– MicroNodes need to receive the 1550nm optical signal at –3.0db level• Range: 0 to –6dBm• “Hot” signals cause service degradation
– It is recommended that the WDM coupler be used for both the return path fiber connections but for test points for trouble shooting by maintenance technicians
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
WDM Loss Considerations
Loss = 1.4dBm for RF downstream @ 1550nm “EDFA” is the RF input “ODN” is the coupler towards the customer/MicroNode
Loss = 1.5 dBm for the RF upstream @ 1610nm “ODN” is the input “Rtn Rx” is the output towards the return receiver
Loss = 1.2 dB for OLT downstream @ 1490nm “OLT” is the input port “ODN” is the output port towards the customer/ONT
Loss = 1.2 dB for OLT upstream @ 1310nm “ODN” is the input port “OLT” is the output port towards the OLT
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Downstream Levels(1550nm)
1550nm LaserTransmitter
EDFA
Downstream Channel Lineup
WDM 1x32Splitter
MicroNode
To CMTS/STB Controller
1490nm Downstream
OLT
IP VideoData, VoIP
TDM VoiceTDM
Business
+3dBm 2.6dBm
+19.6dBm
8.5dB loss forfiber +splicing +
connectors
Drop fiber
1550nm signal is OK 0.0dBm to -6.0dBm is good
+6dBm
+21dBm -5.9dBm
ReturnReceiver
Fiber Distribution20Km = 4.4dB loss
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Return Path Levels (1610nm)
1550nm LaserTransmitter
EDFA
ReturnReceiver
Downstream Channel Lineup
WDM 1x32Splitter
MicroNode
Fiber Distribution20Km= 4.4dB loss
To CMTS/STB Controller
1490nm Downstream
OLT
IP VideoData, VoIP
TDM VoiceTDM
Business
-5.5dBm
-22.5dBm
8.5dB loss forfiber +splicing +
connectors
Drop fiber
-24.0dBm
+3.0dBm
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG 256 Home Remote Hub
WDM1550nm
20Km
CMTS
One Fiber1550nm Down/1590nm Up
32 users per fiber
All Downstream
Traffic
8 Port EDFA
LaserTransmitter
RFCombiner
Temperature-Hardened products
60 Km fiber distance
1
8
1
.
8
coax
1...8
Transmitter
HUB sites can be larger (or smaller) using this configuration
template
Video Head End
Remote HUB
Video Inputs: - Off Air Analog & Digital - Satellite Source:
- Analog Tier -Transcoded Digital via QTM
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG with Optical Nodes/VHubs
1550nm LaserTransmitter
WDM
RFoG MicroNodes
MicroNode
MicroNode
1x32 Splitter
20Km fiber
RRcv
1310 nm
1550 nm EDFA
MicroNode
CMTS
Hub sized in increments of 32(32, 64, 96, 128…
256)
coax wiringinside
buildings
1
32
Long Reach 20Km reach from Hub to RFoG ONUs
+ 60Km or more from HE to Hub
Compatible with products like Aurora Networks VHub (shown)
Up to 256 homes supported with strand/pole-mounted hub
Pole or strand mount
RXmtr WDM
VHub
Hub
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MicroNode For MDUs
EDFA Downstream Video Feed
Uses existing coaxdistribution wiring
Optical Splitter
Headend or NodeApartment Building –
Single or Multiple Floors
APT 1
Upstream CMTS Feed toIP Network & VoIP Switch
RF AMP
MicroNodeTransceive
rAPT 3
APT n-1
APT n
APT 2
AdditionalOpticalNetworks
RFCombin
er
Additional EDFAs
1550nm LaserTransmitter
WDM
Additional WDMs
ReturnReceiver
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Apartment Buildings
Cable Modem
PONFiber
Insid
e C
oax
Wir
ing
Ethernet, USB,or wireless
Regular telephone
wiring
MicroNode Coax Brick Powering Not
Shown
Analog TV
Digital TV
Spare ports available for other devices
Wiring Assumptions: One MicroNode feeds the whole building 4 active devices connected per apt. Limit to 100 feet of coax in the
apartment RF amplifier location
< 100 feet from 32 apartments < 200 feet from 16 apts.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MDU Application with Drop Amp
1550nm LaserTransmitter
EDFA
Downstream Video and CMTS Feed
WDM
1550 nm
1x32Splitter
Headend Optical Distribution
Network
Apartment Building
APT 1
Apt 16
UpstreamCMTS Feed
2 way RF AMPOutput = +36dBmV
RFAMP
32 coax splits to the apartments plus 4 coax splits inside the apartment = 26.0 db of loss
200 feet of coax =10.0 dB loss
TV or STBs receive level = 0.0 dBmV
Apt 32
Up to 1024 apartments per
return path receiver
1610 nm
+18dBmV output level
MicroNode
Coaxial CableFiber
Return Path Receiver MGMT
Alloptic
RFOutput Optical InputsReturn Path Receiver MGMT
Alloptic
RFOutput Optical Inputs
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1610 nm Return Path
• Meets the developing SCTE RFoG standard • Delivers PON Compatible DOCSIS based services• Works on the same ODN with any PON that uses ITU compliant
wavelengths (10G EPON, EPON, GPON)• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream bursts.• RF-based AGC to provide constant RF output over optical input
range.• High RF output with up-tilt reduces need for in-home amplifier.• Transparent return path allows use of existing CPE (All Cable
Modems & Set-top Boxes).• Return transmission threshold suppresses noise from the
subscriber’s residence (Full 5 – 42 MHz band is available).• Dedicated F port for powering• Die-cast aluminum housing protects electronics and provides
excellent shielding.• Temperature Hardened
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1610 nm Return PathPerformance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to –6 dBm– RF Output @ 550MHz: +17dBmV/ch ±2dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 5dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 65 dB (0 dBm input level)• CTB > 65 dB (0 dBm input level)
• Upstream– Wavelength: 1610 nm– Output Power: +3 dBm– Input dynamic range: +15dBmV to +40dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1610 nm Return Path
• Extra high RF output with up-tilt to support MDU applications.
• Delivers PON Compatible DOCSIS based services• Works on the same ODN with any PON that uses ITU compliant
wavelengths (10G EPON, EPON, GPON)• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream bursts.• RF-based AGC to provide constant RF output over optical input
range.• Transparent return path allows use of existing CPE (All Cable
Modems & Set-top Boxes).• Return transmission threshold suppresses noise from the
subscriber’s residence (Full 5 – 42 MHz band is available)..• Dedicated F port for powering• Die-cast aluminum housing protects electronics and provides
excellent shielding.• Temperature Hardened
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1610 nm Return PathPerformance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to –6 dBm– RF Output @ 550MHz: +34dBmV/ch ±1dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 6dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 60 dB (0 dBm input level)• CTB > 60 dB (0 dBm input level)
• Upstream– Wavelength: 1610 nm– Output Power: +3 dBm– Input dynamic range: +10dBmV to +30dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1610 nm Return Pathw/ PON Pass Through
• Adds Support for PON ONTS s– Integrated WDM provides fiber connectivity with ONT– WDM provides 1490/1310 nm PON wavelengths
• Delivers PON and DOCSIS based services• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream bursts.• RF-based AGC to provide constant RF output over optical input
range.• High RF output with up-tilt reduces need for in-home amplifier.• Transparent return path allows use of existing CPE (All Cable
Modems & Set-top Boxes).• Return transmission threshold suppresses noise from the
subscriber’s residence (Full 5 – 42 MHz band is available).• Dedicated F port for powering• Die-cast aluminum housing protects electronics and provides
excellent shielding.• Temperature Hardened
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1610 nm w/ PON Pass ThroughPerformance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to –6 dBm– RF Output @ 550MHz: +17dBmV/ch ±2dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 5dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 65 dB (0 dBm input level)• CTB > 65 dB (0 dBm input level)
• Upstream– Wavelength: 1610 nm– Output Power: +3 dBm– Input dynamic range: +15dBmV to +40dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1610 nm w/ PON Pass Through
• High RF output with up-tilt to support MDU applications.
• Adds Support for PON ONTS s– Integrated WDM provides fiber connectivity with ONT– WDM provides 1490/1310 nm PON wavelengths
• Delivers PON Compatible DOCSIS based services• Works on the same ODN with any PON that uses ITU
compliant wavelengths (10G EPON, EPON, GPON)• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream
bursts.• RF-based AGC to provide constant RF output over optical
input range.• Transparent return path allows use of existing CPE (All
Cable Modems & Set-top Boxes).• Return transmission threshold suppresses noise from the
subscriber’s residence (Full 5 – 42 MHz band is available).• Dedicated F port for powering• Die-cast aluminum housing protects electronics and
provides excellent shielding.• Temperature Hardened
41
PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1610 nm w/ PON Pass Through
Performance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to –6 dBm– RF Output @ 550MHz: +17dBmV/ch ±2dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 5dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 65 dB (0 dBm input level)• CTB > 65 dB (0 dBm input level)
• Upstream– Wavelength: 1610 nm– Output Power: +3 dBm– Input dynamic range: +15dBmV to +40dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1310 nm Return Path
• Meets the developing SCTE RFoG standard • Provides the lowest cost approach to deliver DOCSIS based
services over a deep fiber RFoG infrastructure• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream bursts.• RF-based AGC to provide constant RF output over optical input
range.• High RF output with up-tilt reduces need for in-home amplifier.• Transparent return path allows use of existing CPE (All Cable
Modems & Set-top Boxes).• Return transmission threshold suppresses noise from the
subscriber’s residence (Full 5 – 42 MHz band is available).• Dedicated F port for powering• Die-cast aluminum housing protects electronics and provides
excellent shielding.• Temperature Hardened
43
PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
1310 nm Return PathPerformance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to –6 dBm– RF Output @ 550MHz: +17dBmV/ch ±2dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 5dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 65 dB (0 dBm input level)• CTB > 65 dB (0 dBm input level)
• Upstream– Wavelength: 1310 nm– Output Power: +3 dBm– Input dynamic range: +15dBmV to +40dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1310 nm Return Path
• High RF output with up-tilt to support MDU applications.
• Provides the lowest cost approach to deliver DOCSIS based services over a deep fiber RFoG infrastructure
• 1 GHz RF spectrum provides extended RF capacity.• Fast laser activation prevents degradation of upstream
bursts.• RF-based AGC to provide constant RF output over
optical input range.• Transparent return path allows use of existing CPE (All
Cable Modems & Set-top Boxes).• Return transmission threshold suppresses noise from
the subscriber’s residence (Full 5 – 42 MHz band is available).
• Dedicated F port for powering• Die-cast aluminum housing protects electronics and
provides excellent shielding.• Temperature Hardened
45
PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
High Power 1310 nm Return PathPerformance Characteristics
• Downstream– Input wavelength: 1545 - 1565nm– Input Power Range: +0 to -6 dBm– RF Output @ 550MHz: +34dBmV/ch ±1dBmV– Frequency response: 50 MHz - 1GHz– Tilt: 6dB– RF Performance:
• CNR > 48 dB (–4 dBm input level)• CSO > 60 dB (0 dBm input level)• CTB > 60 dB (0 dBm input level)
• Upstream– Wavelength: 1310 nm– Output Power: +3 dBm– Input dynamic range: +10dBmV to +30dBmV– Frequency response: 5 to 42MHz– Laser Activation: <1.5 s
• SCTE compliant F connectors and cast housing.
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Network Interface Device (NID)
• Environmental and mechanical protection for NIU• Integral fiber management/splice tray• Inner cover to secure optics from subscribers• Weather seal around door, and grommets for fiber & coax cables.• Engineered to UL specifications for “Extreme Weatherability”• Compatible with 1550/1310 and 1550/1610 NIUs
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG MDU Application with 4 STBs/CMs per Apartment
1550nm LaserTransmitter
EDFA
Downstream Video and CMTS Feed
WDM
1550 nm
1x32Splitter
Headend Optical Distribution
Network
Apartment Building
APT 1
Apt 16
UpstreamCMTS Feed
RFAMP
Apt 32
Up to 1024 apartments per
Return Path Receiver
1590 nm
MicroNode
Coaxial CableFiber
Return Path Receiver MGMT
Alloptic
RFOutput Optical InputsReturn Path Receiver MGMT
Alloptic
RFOutput Optical Inputs
16-way coax splitter to the apartments & 4-way splitters inside the apartment = 26 .0 db of loss 200 feet of coax =10.0 dB loss
Or32-way coax splitter for 32 apartments with 100 feet of coax is about the same loss
MicroNode requires +15 to +40dBmV
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MicroNode with RF return in a Building with 200’ coax
1550nm LaserTransmitter
EDFA
Downstream Video and CMTS Feed
WDM
1550 nm
1x32Splitter
Headend Optical Distribution
Network
Apartment Building
APT 1
Apt 16
UpstreamCMTS Feed
RFAMP
Apt 32
Up to 512 apartments per
Return Path Receiver
1590 nm
MicroNode
Coaxial CableFiber
Return Path Receiver MGMT
Alloptic
RFOutput Optical InputsReturn Path Receiver MGMT
Alloptic
RFOutput Optical Inputs
A single MicroNode supports 16 apartments with 4 coax runs for any service
Coax distance < 200 feet from RF amplifier for longest coax run
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
RFoG to the Curb
1550nm LaserTransmitter
WDM
RFoG to the Curb
1x32 Splitter + 20Km of fiber
RPR
1310 nm
1550 nm EDFA
CMTS
Hub “Node” size can be 32, 64, 96, 128, 256 (increments of 32)
Coax drops
Pole or Strand mount hubs
RP Xmtr
Coax RF amps
MicroNode
MicroNode
100’s of meters of coax
WDM
MicroNode
Coaxial CableFiber Most MicroNodes are temperature-hardened (-40C to +65C working temp)
RF signal quality can be amplified for coax distances and splits MicroNode powering:
+12VDC external or coax supplied Very low power consumption: 3W typical
RF signal levels upstream and downstream must be considered when engineering the RF amplifiers and coax cable distances.
Shared users greatly reduces the cost per user
MicroNode
MicroNode
MicroNode
MicroNode
MicroNode
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
MicroNode Comparison
1550nm RF
1610nm RF
RF
1550nm RF
1310nm RF
RF
1550 nm RF1490 nm PON
1610 nm RF1310 nm PON
RF
To ONT
xPON-Friendly 1590nm Upstream
avoids wavelength conflict
Standard 1550nm Downstream
No ONT Support 1310nm Upstream
may conflict with PON wavelength
Standard 1550nm Downstream
xPON ONT Supported 1610nm Upstream
avoids wavelength conflict
Port for ONTStandard 1550nm
Downstream RFWDM integrated for
PON support
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Low Noise Return Path Receiver
Average MER VS RF Drive Level-20 dBm into Return Rx
15
20
25
30
35
40
20 25 30 35 40 45 50
RF Level Per Channel (dBmV)
Av
era
ge
ME
R (
dB
)
Alloptic Receiver, Rev 2
Alloptic Current Receiver, Rev 1
C-Cor Reciever
Measured with four 6.4 MHz 64QAM carriers plus
one 1.6 MHz QPSK carrier
Typical HFC receivers have no dynamic range at 30dB MER; which is the level needed for error-free 64QAM performance
EIN = 7pA/rtHz
Alloptic’s current return path receivers meet the 30dB requirement with 10dB of dynamic range
EIN = 4pA/rtHz
Alloptic’s next-gen return path receivers meet the 30dB requirement with 15dB of dynamic range
EIN = 1.5pA/rtHz
Typical HFC Receiver
Noise performance correlates directly to the distance, splits and modulation formats achieved in RFoG applications
MER/NPR is critical to enabling full DOCSIS 3.0 compatibility
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Hybrid RF PONAdding Enhanced Business Services
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Commercial Services Enabled
Hybrid RFoG/PON
1550nm LaserTransmitter
EDFA
Return Path
Receiver
Downstream Channel Lineup
WDM
1550 nm
1x32 Splitter MicroNode
Hub Optical Distribution
Network
Customer Premises
1610 nm
To CMTS/
STB ControllerUnused GEPON PortAdd OLT
Unused Splitter Port
Add Business ONT
Unused MicroNode PortAdd ONT ONT
1490 nm Downstream1310 nm Upstream
OLT
IP VideoData, VoIP
TDM VoiceTDM
Business
ONT
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PT-104190-ENPRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc
Thank You!
Cable Servicios S.A.
Teléfonos: 57 (224 14 87 / 224 14 89)
www.cableservicios.com
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