cdm qx presentation

8/6/2019 CDM Qx Presentation

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ADVANCED COMMUNICATION SOLUTIONS

CDMCDM--Qx/QxL Satellite ModemQx/QxL Satellite Modem

withwithDoubleTalkDoubleTalkTMTM CarrierCarrier--inin--CarrierCarrier

The Most Bandwidth Efficient Modem Ever !The Most Bandwidth Efficient Modem Ever !

November 2007November 2007


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Agenda

DoubleTalk Carrier-in-Carrier Overview

Business Case - Why use CDM-Qx/QxL withDoubleTalk Carrier-in-Carrier ?

CDM-Qx/QxL OverviewArchitecture

FeaturesConfiguration

DoubleTalk is a Trademark of Applied Signal TechnologyCarrier-in-Carrier is a Registered Trademark of Comtech EF DataAll specifications are subject to change without notice.


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Traditional SATCOM Optimization

Traditionally, you could reduce Bandwidth orPower, but notboth without significantlyincreasing the CAPEXReduce Occupied Bandwidth

Use Higher Order Modulation

Increases Transponder Power Utilization Increases BUC/HPA Size and/or Antenna Size

Reduce Transponder Power Utilization Use Lower Order Modulation

Increases Occupied Bandwidth

Reduces BUC/HPA Size and/or Antenna Size

Without Using Lower Order Modulation

Increase Antenna Size


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Traditional SATCOM Optimization

Reduce BUC/HPA Size

Use Lower Order Modulation Increases Occupied Bandwidth


Increase Antenna Size

Reduce Antenna Size

Use Lower Order Modulation

Increases Occupied Bandwidth


Increases Transponder Power

Increases BUC/HPA Size


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Multi Dimensional Optimization

DoubleTalk Carrier-in-Carrier combined withproper Modulation and FEC, makes it possible tooptimize satellite communications like neverbeforeReduce OPEX

Occupied Bandwidth & Transponder Power

Reduce CAPEX BUC/HPA Size and/or Antenna Size

Increase throughput Increase link availability

Or a combination to meet different objectives


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DoubleTalk Carrier-in-Carrier

Based on Applied SignalTechnologys (APSG)DoubleTalk bandwidthcompression system Uses patented Adaptive

Cancellation Allows full duplex satellite links totransmit concurrently in the samesegment of transponder bandwidth

Delivers unprecedented savingswhen combined with Comtech EFDatas advanced Forward ErrorCorrection and Modulationtechniques

Without DoubleTalk Carrier-in-Carrier

With DoubleTalk Carrier-in-Carrier


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DoubleTalk Carrier-in-CarrierTheory of Operation

Mod_1 Demod_1 Demod_2 Mod_2

S1 S2

(S1+S2)*'

S1* S2*S1 S2

S2 S1

(S1+S2)*''

S1* - Time Delayed Copy of S1

(S1+S2)*' Composite Signal

S2* - Time Delayed Copy of S2


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Theory of Operation (contd)

At start-up, the modem calculates the exact

round-trip delay The modulator provides a copy of the time

delayed transmitted signal to the demodulator

The demodulator cancels the time delayedtransmitted signal from the composite receivedsignalNominal cancellation is 25 dB to 30 dB

The residual interfering signal appears as noise i.e. the Noise Floor is raised, slightly degrading the Eb/No


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Eb/No Degradation - QPSK

Very low degradation when using QPSK

Eb/No Degradation vs Carrier Power Ratio (QPSK)

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

-10 -5 0 5 10

Interferer - Desired Carrier Power (dB)

Eb/NoDegradation(dB)

QPSK, TPC 17/18

QPSK, TPC 3/4

QPSK, TPC 21/44

QPSK, TPC 7/8


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Eb/No Degradation 8-PSK

Low degradation except for TPC, Rate 17/18

Eb/No Degradation vs Carrier Power Ratio (8-PSK)

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

0.0

-10 -5 0 5 10


Eb

/NoDegradation(dB

)

8-PSK, TCM 2/3

8-PSK, TPC 7/8

8-PSK, TPC 3/4

8-PSK, TPC 17/18


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Eb/No Degradation 16-QAM

Low degradation for TPC, Rate 3/4

Eb/No Degradation vs Carrier Power Ratio (16-QAM)

-2.0

-1.8

-1.6

-1.4

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

0.0

-10 -5 0 5 10


Eb

/NoDegradation(dB)

16-QAM, TPC 3/4

16-QAM, TPC 7/8


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DoubleTalk Carrier-in-CarrierOperational Rules for CDM-Qx

Full-duplex links only CDM-Qx must be configured as a Modem

Loop-back satellite (i.e. the transmitting station must beable to receive itself)

Non-processing satellite (i.e. does not demodulate/

remodulate the signal) Symbol rate asymmetry of the 2 carriers should be within

3:1 for optimal performance

(Interfering carrier power desired carrier power), in dB,< 10 dB (except for 16QAM, R=7/8)

Carrier offset within 32 kHz i.e., Center frequencies of the desired and the interfering carriers

are within 32 kHz


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Optimization Tradeoffs

With proper selection of Modulation and FEC,DoubleTalk Carrier-in-Carrier can be used toachieve multi-dimensional optimization

The following slides show an existing network

and the optimization possibilities


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Optimization Tradeoffs Example

4 site Network with 23 E1s between Hub andRemotes

Original Network

Modulation & Coding QPSK, TPC 3/4 & 8PSK, TPC 7/8Allocated Bandw idth 56.0 MHz

Power Eq. Bandw idth 23.7 MHzTotal Lease Resource 56.0 MHz

Excess Margin 3.7 dB

HPA @ Hub 15.9 W

HPA @ Remote1 165.0 WHPA @ Remote2 61.8 W

HPA @ Remote3 166.4 W


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Option A(Optimize Everything)

Reduce Leased Bandwidth and CAPEX andincrease Availability

Use DoubleTalk Carrier-in-Carrier with QPSK TPC 7/8

OriginalWith Doub leTalk

Carrier-in-Carrier

Savings/Improvement

With Carrier-inCarrier

Allocated Bandw idth 56.0 MHz 37.7 MHz 33%

Power Eq. Bandw idth 23.7 MHz 15.4 MHz 35%

Total Lease Resource 56.0 MHz 37.7 MHz 33%

Excess Margin 3.7 dB 3.9 dBW 5%

HPA @ Hub 15.9 W 9.5 W 40%HPA @ Remote1 165.0 W 99.0 W 40%

HPA @ Remote2 61.8 W 72.5 W

HPA @ Remote3 166.4 W 101.5 W 39%

QPSK, TPC 3/4 &8PSK, TPC 7/8

Modulation & Coding QPSK, TPC 7/8


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Option B(Maximize OPEX Saving)

Maximize Leased Bandwidth saving Use DoubleTalk Carrier-in-Carrier with 8-PSK TPC 3/4

and 8-PSK TPC 7/8

OriginalWith DoubleTalk

Carrier-in-Carrier

Savings/Improvement


Allocated Bandw idth 56.0 MHz 28.4 MHz

Pow er Eq. Bandw idth 23.7 MHz 25.9 MHz

Total Lease Resource 56.0 MHz 28.4 MHz 49% saving in Leased BW

Excess Margin 3.7 dB 0.5 dB

HPA @ Hub 15.9 W 15.6 W

HPA @ Remote1 165.0 W 166.5 WHPA @ Remote2 61.8 W 119.0 W

HPA @ Remote3 166.4 W 175.0 W

Modulation & CodingQPSK, TPC 3/4 &

8PSK, TPC 7/8

8PSK, TPC 3/4 &

8PSK, TPC 7/8


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Option C(Maximize Availability & Save CAPEX)

Increase Availability (margin) while savingCAPEX

Use DoubleTalk Carrier-in-Carrier with QPSK TPC 21/44and QPSK TPC 3/4


Carrier-in-Carrier

Savings/Improvement



Pow er Eq. Bandw idth 23.7 MHz 12.4 MHz

Total Lease Resource 56.0 MHz 56.0 MHz

Excess Margin 3.7 dB 7.6 dB 145%HPA @ Hub 15.9 W 9.0 W 43%

HPA @ Remote1 165.0 W 73.7 W 55%

HPA @ Remote2 61.8 W 51.9 W 16%

HPA @ Remote3 166.4 W 78.6 W 53%


8PSK, TPC 7/8

QPSK, TPC 21/44 &

QPSK TPC 3/4


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Option D

Improve Leased Bandwidth saving(compared to Option A), while maintainingAvailability and achieve some HPA savings

Use DoubleTalk Carrier-in-Carrier with QPSK TPC 7/8and 8-PSK TPC 7/8


Carrier-in-Carrier

Savings/Improvement



Pow er Eq. Bandw idth 23.7 MHz 16.8 MHzTotal Lease Resource 56.0 MHz 35.0 MHz 38%

Excess Margin 3.7 dB 3.2 dB

HPA @ Hub 15.9 W 9.5 W 40%

HPA @ Remote1 165.0 W 110.0 W 33%

HPA @ Remote2 61.8 W 72.5 W

HPA @ Remote3 166.4 W 125.0 W 25%


8PSK, TPC 7/8

QPSK, TPC 7/8 &

8PSK, TPC 7/8


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Spectral Efficiency and Power

DoubleTalk Carrier-in-Carrier provides better spectralefficiency while using lower order modulation and FEC

Traditional 16-QAM, R=7/8 is spectrally equivalent to QPSK,R=7/8 (with CnC)

Lower order modulation provides the saving in transponderpower and HPA power

Allows extremespectral utilization that would not otherwise bepossible

16-QAM, R=7/8 (with CnC) is spectrally equivalent to 256-QAM,

R=7/8, i.e. 7 bps/Hz A customer is currently testing/deploying 16-QAM, R=7/8 with CnC

16-QAM, R=3/4 (with CnC) allows one of our customers to deploy58 T1s in a 36 MHz transponder

DoubleTalk Carrier in Carrier


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DoubleTalk Carrier-in-CarrierDeployment

DoubleTalk Carrier-in-Carrier provides a powerfulmechanism to trade bandwidth andpower

This allows successful deployment of DoubleTalkCarrier-in-Carrier in almost any scenario

Transponder Power/Bandwidth Asymmetry

Traditional Link is Balanced Traditional Link is Bandwidth Limited

Traditional Link is Power Limited

Antenna Size Asymmetry

Data Rate Asymmetry

Upgrading Legacy Bandwidth


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Upgrading Legacy BandwidthLimited Link

Galaxy 10R, C-Band, 13.0 m to 9.15 m

Over 60% saving by upgrading to CDM-Qx withDoubleTalk Carrier-in-Carrier, TPC and 20% Roll-off

Savings

Hub to

Remote

Remote

To HubTotal

Hub to

Remote

Remote

to HubTotal

Data Rate (kbps) 1544 1544 1544 1544Modulation 16-QAM 16-QAM 16-QAM 16-QAM

FEC RS 3/4 RS 3/4 TPC 3/4 TPC 3/4

Carrier Spacing 1.4 1.4 1.2 1.2

Occupied BW (kHZ) 800.0 800.0 1600.0 620.0 620.0 620.0

Power Eq. BW (kHz) 360.0 324.0 684.0 309.6 280.8 590.4

Leased BW (kHz) 1600.0 620.0 61%

Legacy Link (SDM-8000) With DoubleTalk Carrier-in-Carrier

Use Spreading When Traditional Link


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Use Spreading When Traditional Linkis Balanced OR Power Limited

OCCUPIED BW

POWER


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Upgrading Balanced Link

Intelsat 1R, C-Band, 11.0 m to 4.5 m

For balanced links, typical savings is 35-40%

Savings

Hub to

Remote

Remote

o HubTotal

Hub to

Remote

Remote

to HubTotal

Data Rate (kbps) 2048 2048 2048 2048

Modulation 8-PSK 8-PSK QPSK QPSK FEC TPC 3/4 TPC 3/4 TPC 7/8 TPC 7/8

Occupied BW (kHZ) 1300.0 1300.0 2600.0 1675.0 1675.0 1675.0 36%

Power Eq. BW (kHz) 1670.4 842.4 2512.8 975.6 536.4 1512.0 40%

Leased BW (kHz) 2600.0 1675.0 36%

Current Link With DoubleTalk Carrier-in-Carrier


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Upgrading Power Limited Link

Galaxy 10R, Ku-Band, 5.6 m to 2.4 m

Use of Spreading saves Occupied BW, Power

Equivalent BW and HPA Power

Savings

Hub to

Remote

Remote

To HubTotal

Hub to

Remote

Remote

to HubTotal

Data Rate (kbps) 1544 1544 1544 1544Modulation 8-PSK 8-PSK QPSK QPSK

FEC TPC 3/4 TPC 3/4 TPC 7/8 TPC 7/8Occupied BW (kHZ) 961.0 961.0 1922.0 1236.0 1236.0 1236.0

Pow er Eq. BW (kHz) 1368.0 1048.0 2416.0 767.0 533.0 1300.0

Leased BW (kHz) 2416.0 1300.0 46%

Hub HPA (W) 42%

Remote HPA (W) 49%

Original Link

With DoubleTalk Carrier-in-

Carrier

1.2

3.9

0.7

2.0

Upgrading Link With


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Upgrading Link WithAsymmetric Antennas

Hub 9.0 m Antenna Remote 2.4 m Antenna

IS-902, Ku-band

Carrier power ratio is 6 dB (well within spec)

Original Netw orkWith DoubleTalk

Carrier-in-Carrier

Savings/Improvement

With Carrier-inCarrierData Rate 2,048 kbps 2,048 kbps

Allocated Bandw idth 1.8 MHz 1.3 MHz 28%

Power Eq. Bandwidth 1.8 MHz 1.3 MHz 28%

Total Lease Resource 1.8 MHz 1.3 MHz 28%

HPA @ Hub 3.1 W 2.3 W 26%

HPA @ Remote 16.9 W 12.7 W 25%

Modulation & Coding 16-QAM, TPC 3/4 &16-QAM, TPC 7/8

8PSK, TPC 3/4 &8PSK, TPC 7/8

Recent Customer


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Recent CustomerSavings Examples

New Network in Asia175 MHz (Traditional) vs. 125 MHz (CnC)

Annual Savings ~ $600,000 (@ $1,000 / MHz / Month)

Upgrading Existing Network in Africa40% potential saving on 1st transponder (36 MHz)


44% potential saving on 2nd transponder (54 MHz) Annual Savings ~ $800,000 (@ $2,800 / MHz / Month)

Upgrading Existing Network in Americas38% potential saving on 1st transponder (41 MHz)



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Myths/Misconceptions

Increases power so cannot be used if original link ispower limited

Spreading converts a power limited link to a bandwidthlimited link

DoubleTalk Carrier-in-Carrier can now be successfullyapplied

Not only saves transponder bandwidth/power but also HPApower

Increases IM

DoubleTalk Carrier-in-Carrier has no direct relation to IM As spreading reduces the total power used by a pair of

carriers, the impact on IM should be negligible


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Myths/Misconceptions (contd)

Increases Latency

DoubleTalk Carrier-in-Carrier has no measurable impact on

latency at any data rate Needs Satellite Operator Approval

DoubleTalk Carrier-in-Carrier has been deployed and/or

tested on all major satellite systems Intelsat/Panamsat

SES/New Skies

Eutelsat

Express Insat

Telecom

Telesat


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Total Cost of Ownership

Simple tools that allow users to quicklycompare DoubleTalk Carrier-in-Carrier withother legacy solutions

A simple Microsoft Excel based tool can bedownloaded from CEFD website

http://www.comtechefdata.com/toolstco.asp

For more detailed calculations, use the web basedtool

http://optimize.comtechefdata.com
http://www.comtechefdata.com/toolstco.asphttp://optimize.comtechefdata.com/http://optimize.comtechefdata.com/http://www.comtechefdata.com/toolstco.asp


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Monthly Leased Bandwidth &


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Monthly Leased Bandwidth &Savings

Monthly Leased BW (MHz)

(Optimal Bandwidth Link)

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

MyModem CDM-600 w/LDPC CDM-Qx w/Carrier-

in-Carrier

Monthly BW Savings

$-

$500

$1,000

$1,500

$2,000

$2,500

$3,000

$3,500

$4,000

CDM-600 w/LDPC CDM-Qx w/Carrier-in-Carrier

HPA/BUC Size Reduction


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HPA/BUC Size Reduction(While Using Less Bandwidth than the Original Link )

The DoubleTalk Carrier-in-Carrier link, while

using 10% lessbandwidth compared tooriginal link

Reduces transmit powerby 54% (Hub to Remote)

Reduces transmit powerby 38% (Remote to Hub)

Increase Throughput


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Increase Throughput(While Using Same Bandwidth as the Original Link)


using same bandwidthas compared to originallink

Increase throughput by58% in both directions

Increase Link Margin


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Increase Link Margin(While Using Same Bandwidth as the Original Link)


using same bandwidthas compared to originallink

Increases link margin by2.9 dB (Hub to Remote)

Increases link margin by2.6 dB (Remote to Hub)

Financial Metrics


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Financial Metrics(Total Savings & Total Cost Compared To Original Link)

Life Time Savings

(Net Present Value)

$-

$20,000

$40,000

$60,000

$80,000

$100,000

$120,000

$140,000

$160,000

CDM-600 w/LDPC CDM-Qx w/Carrier-in-Carrier

Lifetime Total Cost(Net Present Value)

$-

$50,000

$100,000

$150,000

$200,000

$250,000

$300,000

$350,000

$400,000

$450,000

$500,000

MyModem CDM-600 w/LDPC CDM-Qx

w/Carrier-in-

Carrier

Conclusions


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Conclusions

When properly deployed, DoubleTalk Carrier-in-Carrier can provide unprecedented savings

For T1/E1 rates and higher

New installations can have a payback period of as

little as 0 to 3 monthsModem Replacement

Legacy modem (non TPC) replacement can break evenin as little as 1 to 2 months

TPC Modem replacement can break even in as little as 2to 4 months

Typical Applications


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Typical Applications

Cellular backhaul

High speed trunking

Offshore

communications Limited rack space

installations

CDM Qx Overview


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CDM-Qx Overview

Modular multi-channel satellite modem in 1 RUchassis

DoubleTalk Carrier-in-Carrier bandwidth compression Data rates up to 20 Mbps

Viterbi, Concatenated Reed Solomon and 2nd

generation Turbo Product Codes (TPC) 70/140 MHz or L-Band IF

EIA-422, Sync EIA-232, V.35, HSSI, G.703 T1, G.703

E1, G.703 E2 and Quad-E1 data interface D&I++ for G.703 E1 & Quad-E1

Legacy and Standards based monitoring & control

External & Limited Internal redundancy options

Architecture


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Architecture

A CDM-Qx consists of:

A chassis

1 RU size 4-slots per chassis, each

capable of holding a modulatoror a demodulator card

Power supply

M&C board with EIA-232/485and 10/100BaseT Ethernet port

Tx IF, Rx IF and Ref

Combination of Modulator and/or

Demodulator cards Data interface

Optional TPC encoder/decoder

Power SupplyDigital & IFBackplanes

M&C

4 Slots

Modulator

IF Interface

Note: Quad-E1 requires 2 chassis slots

CDM Qx Chassis


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CDM-Qx Chassis

Valid Configurations (per Chassis) are 1 to 4 Modulators

1 to 4 Demodulators

1 Modem 2 Modems in 1:1 configuration (i.e. only 1 modem is online at a time)

DoubleTalk Carrier-in-Carrier license (option)

CDM-Qx: 50 to 90, 100 to 180 MHz 75 ohm, BNC

50 ohm, BNC (option)

CDM-QxL: 950 to 1950 MHz 50 ohm, Type-N Female

Primary power supply 100-240 VAC or 48 VDC

BUC Power Supply option (CDM-QxL)

Internal redundancy options for modulator and/or demodulator card

DoubleTalk Carrier-in-Carrier


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Licensing

Must be configured as a Modem

Requires 1 license per Modem Available tiers

Up to 512 kbps

Up to 1 Mbps

Up to 2.5 Mbps

Up to 5 MbpsUp to 10 Mbps

Up to 20 Mbps

Special Licensing Rules - 1:1


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Internal Redundancy

Even when a chassis is configured for 1:1 internalmodem redundancy, 2 licenses are required

Max Data RateRequired (kbps)

Online ModemLicense

Backup ModemLicense

512 kbps 512 kbps 512 kbps

1 Mbps 1 Mbps 1 Mbps

2.5 Mbps 2.5 Mbps 2.5 Mbps

5 Mbps 5 Mbps 2.5 Mbps

10 Mbps 10 Mbps 2.5 Mbps20 Mbps 20 Mbps 2.5 Mbps

Demo Mode


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Demo Mode

The CDM-Qx supports a Demo Mode whichallows users to test the DoubleTalk Carrier-in-

Carrier capability In the Demo Mode, DoubleTalk Carrier-in-

Carrier can be used for up to 45 days

The 45 day countdown timer can be turned ONand OFF as many times as needed

Up to 10 Mbps operation on 1st Modem

Up to 2.5 Mbps operation on the 2nd Modem Up to 10 Mbps operation if used in a 1:1

Internally Redundant configuration

Modulator/Demodulator


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Modulator/Demodulator

Separate card for Modulator and Demodulator

L-band or 70/140 MHz

Cannot mix-and-match in a chassis Transmit/Receive data rate

Up to 5 Mbps (standard)

Up to 10 Mbps (FAST option)


Independently selectable for each Modulator/Demodulator

Modulation/Demodulation

BPSK, QPSK (standard) 8-PSK (FAST option)

16-QAM (FAST option)


Modulator/Demodulator (contd)


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Modulator/Demodulator (cont d)

FEC Encoding/Decoding Viterbi (standard)

Concatenated Reed-Solomon (standard) Comtech (220, 200)

EF Data Closed (225, 205)

IESS-310 8PSK/TCM (219, 201)

2nd Gen TPC Encoder/Decoder card (hardware option) Up to 5 Mbps (included with hardware)



Each Modulator or Demodulator requires a separate 2nd GenTPC Encoder/Decoder card


Modulator/Demodulator (contd)


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Modulator/Demodulator (cont d)

Data interface (hardware selection) EIA-422/232/V.35 (D25)

EIA-422 up to 12 Mbps V.35 up to 12 Mbps

HSSI Up to 20 Mbps

G.703 T1/E1 Balanced (D15) G.703 T1/E1 Unbalanced (BNC)

G.703 E2 Unbalanced (BNC)

Select one per Modem (i.e. Modulator and Demodulator cardcombination) OR one per Modulator card and Demodulatorcard if using independently In case of Modem, only the Demodulator card requires an

interface

Enhanced D&I++


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Enhanced D&I++

Available with G.703 E1 data interfaceSupported for E1-CCS only

Any combination of 1 to 31 time slots can beselected

Simultaneous use of EDMAC and AUPC

Low overhead2.2% including EDMAC and AUPC

Interoperable with CDM-600/CDM-600LFor up to 24 slotsViterbi and TPC FEC only

Quad E1 Interface (QDI)


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Quad E1 Interface (QDI)

Quad-E1 interface aggregates up to 4 fulland/or fractional E1s into a single satellite

carrierEliminates multi-carrier backoff for HPA/BUC

Generally 50% or more reduction in HPA/BUC size

Reduction in number of modems requiredReduction in rack space

Quad-E1 Module

RJ-45 connector for each E1 (balanced)Requires 2 slots in the chassis

The other 2 slots must be occupied by a modem

Quad-E1 Interface (QDI) (contd)


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Quad E1 Interface (QDI) (cont d)

Independent D&I++ For Each E1 Allows for Dropping or Inserting any combination of 1 to 31

Time Slots on each E1 Aggregate, 1 to 128 Time Slots

E1-CCS only

Very Low Overhead 0.4% EDMAC/AUPC overhead is additional (if used)

Extremely efficient compared to 6.67% required by IBS

Clocking/Synchronization

All 4 E1 must have same clock source

QDI only interoperates with another QDI at the otherend

FEC, Modulation & Data RateS (U f d O ti )


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Summary (Unframed Operation)FEC Type Modulation Code Rate Data Rate Range

Viterbi BPSK Rate 1/2 32 kbps - 5 Mbps

Viterbi QPSK Rate 1/2 32 kbps - 10 Mbps

Viterbi QPSK Rate 3/4 32 kbps - 15 Mbps

Viterbi QPSK Rate 7/8 32 kbps - 17.5 Mbps

Viterbi + RS (201/219) BPSK Rate 1/2 32 kbps - 4.5 Mbps

Viterbi + RS (201/219) QPSK Rate 1/2 32 kbps - 9.1 Mbps

Viterbi + RS (201/219) QPSK Rate 3/4 32 kbps - 13.7 Mbps

Viterbi + RS (201/219) QPSK Rate 7/8 32 kbps - 16 Mbps

Viterbi + RS (201/219) 16-QAM Rate 3/4 352.4 kbps - 20 Mbps

Viterbi + RS (201/219) 16-QAM Rate 7/8 411.1 kbps - 20Mbps

TCM + RS (201/219) 8-PSK Rate 2/3 234.9 kbps - 18.3 Mbps

TPC BPSK Rate 5/16 32 kbps - 3.1 Mbps

TPC BPSK Rate 21/44 32 kbps - 4.7 Mbps

TPC QPSK Rate 21/44 32 kbps - 9.5 Mbps

TPC QPSK Rate 3/4 32 kbps - 15 Mbps

TPC QPSK Rate 7/8 32 kbps - 17.5 MbpsTPC QPSK Rate 17/18 32 kbps - 18.8 Mbps

TPC 8-PSK Rate 3/4 288 kbps - 20 Mbps

TPC 8-PSK Rate 7/8 336 kbps - 20 Mbps

TPC 8-PSK Rate 17/18 362.7 kbps - 20 Mbps

TPC 16-QAM Rate 3/4 384 kbps - 20 Mbps

TPC 16-QAM Rate 7/8 448 kbps - 20 Mbps

EDMAC and AUPC


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Embedded Distant End Monitoring & Control

Supports EDMAC and EDMAC-2 framing

EDMAC Interoperable with CDM-600/CDM-600L and

CDM-570/CDM-570L

EDMAC-2

Interoperable with CDM-570/CDM-570L

Automatic Uplink Power Control

Interoperable with CDM-600/CDM-600L (EDMAC framing)

Interoperable with CDM-570/CDM-570L (EDMAC orEDMAC-2 framing)

Internal Redundancy ForModulator/Demodulator Card(s)


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Modulator/Demodulator Card(s)

CDM-Qx can provide redundancy for modulatorand/or demodulator card(s) within the chassiswithout requiring an external switch 1:1 Redundancy for Modulator & Demodulator card when

configured as a Modem

1:1, 1:2 or 1:3 Redundancy when using Modulators Only

or Demodulators Only It ONLY protects against a failure in the modulator

and/or demodulator card

No protection against failures in Data Interface,M&C module or other common sub-systems in thechassis

For critical links, use of external redundancy is

strongly recommended

Management


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g

CDM-Qx can be managed through Modem front panel

Menu driven, easy to operate, user interface via keypad anddisplay

Nested menus provide access to all M&C functions

Remote M&C port

EIA-232 or EIA-485 operation Remote commands provide access to all M&C functions

10/100BaseT Ethernet port Configuration and management using TCP/IP based protocols

SNMP Web browser (http)

telnet

Access to all M&C functions

M&C Screens (Web Based)


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( )

Modem

configuration

M&C Screens (Web Based)


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( )

Modulator & Demodulatorconfiguration

Spectrum Analyzer Function


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One of the demodulators can be used to viewthe spectrum or the constellation map

When viewing spectrum, the demodulator is notavailable for user data

Available through a stand alone MS Windowsapplication or a web browser

Windows application can be downloaded from

Comtech EF Datas web site

Spectrum Analyzer (Windows App)


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p y ( pp)

Spectrum Analyzer (Web Based)


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Additional Features


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Rolloff ()

20% and 35%

External Redundancy Options

1:10 redundancy switch

CRS-300-Qx1:1 redundancy switch

CRS-311-Qx

Configuration Example 1


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CDM-Qx with DoubleTalk Carrier-in-Carrier tosupport 1 T1

Chassis 1

DoubleTalk Carrier-in-Carrier license 128 ksps to 2.5 Mbps

Modulator 1

8-PSK Modulation (if needed)

2nd Gen TPC encoder up to 5 Mbps

Demodulator 1

8-PSK Demodulation (if needed)

2nd Gen TPC decoder up to 5 Mbps

G.703 T1 Interface 1



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CDM-Qx with DoubleTalk Carrier-in-Carrier tosupport 4 E1

Chassis 1 DoubleTalk Carrier-in-Carrier license 128 ksps to 10 Mbps

Modulator 1

8-PSK Modulation (if needed) 2nd Gen TPC encoder up to 10 Mbps

Demodulator 1 8-PSK Demodulation (if needed)

2nd Gen TPC decoder up to 10 Mbps

Quad E1 Data Interface 1



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CDM-Qx with DoubleTalk Carrier-in-Carrier to support 20 Mbpsfull-duplex, 1:1 internally redundant Chassis 1

DoubleTalk Carrier-in-Carrier license 128 ksps to 20 Mbps (online) DoubleTalk Carrier-in-Carrier license 128 ksps to 2.5 Mbps (backup)

1:1 redundancy

Modulator 2, each with

8-PSK/16QAM Modulation (if needed) 2nd Gen TPC encoder up to 20 Mbps

Data rate up to 20 Mbps

Demodulator 2, each with

8-PSK/16QAM Demodulation (if needed) 2nd Gen TPC decoder up to 20 Mbps

Data rate up to 20 Mbps

HSSI interface 1

Conclusions


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CDM-Qx with DoubleTalk Carrier-in-Carriercan

Reduce OPEX

Reduce CAPEX

Increase link availability (i.e. margin) Increase throughput

Typical payback period of 0 to 3 months

Significant OPEX savings there after

Modem Accessories


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Variety of accessories to enhance the functionality ofour satellite modems

1:1 and 1:N Redundancy Switches Provides fully automaticor manual protection of circuits

Performance Enhancement Proxies Accelerates the TCPtraffic over impaired satellite links

Comtech Monitor & Control System Provides management ofComtech EF Data equipment (modems, transceivers,converters and redundancy switches)

And, more

Comtech EF Data


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Delivers global services and support

Specializes in solutions that optimize

satellite communications Has technologically advanced infrastructureproducts installed in more than 160countries

Provides around the clock customersupport

Has authorized service centers around theworld

Is prepared to help you: Optimize satellite communications Minimize operating expenses

Maximize transponder utilization

Lower the total cost of ownership


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ADVANCED COMMUNICATION SOLUTIONS

Contact Us:Contact Us:

2114 West 7th Street2114 West 7th Street

Tempe, AZ 85281Tempe, AZ 85281

USAUSATel 1.480.333.2200Tel 1.480.333.2200

FAX 1.480.333.2540FAX 1.480.333.2540

[email protected]@comtechefdata.com

www.comtechefdata.comwww.comtechefdata.com

cdm qx presentation

Documents