Atec Tektronix-DMA120-DMA121 User Manual download pdf

Affordable, portable, ready for

cable system technicians: digital

channel 64 and 256QAM

transmission performance

verification measurements

The DMA120 Series Digital

Modulation Analyzers pro-

vide answers to nagging ques-

tions about how to test and

verify performance of your

digital plant. Quantification

of digital transmission perfor-

mance – at any point in your

system – will greatly enhance

technical management and

decision making. The

DMA120 provides analysis of

ITU-T-J.83, Annex B 64 and

256QAM and the DMA121

verifies 64 and 256QAM for-

matted per DVB-C.

The DMA120 Series provides

the intelligence cable TV

technicians need to effi-

ciently install and maintain

HFC distribution plant using

64 or 256QAM transmission.

Measurement results provide

a clear picture of system per-

formance, minimizing the

need to re-visit an installa-

tion site or make additional

service calls. The DMA120

Series field tools are housed

in a rugged, weather resistant

package and are powered by

an easy-to-change NiMh bat-

tery. Standard accessories

include a protective soft case,

mains power supply, and

user’s manual.

DMA120, DMA121

Digital Modulation

Analyzers

64 and 256QAM Analysis

In-service Digital Channel

Performance Verification

Measurements at an Affordable

Price

Measurements Compliant with DVB

(ETSI) Standard ETR290

Troubleshooting Aided by

Constellation, Spectrum, and

Equalization Display Modes

Most Measurements Require Only

Two Keystrokes

Pass/fail Indication Reduces

Training Requirements for

Technicians New to Digital Signal

Measurements

PC Card (PCMCIA) Slot for Easy

Memory Expansion

Small and Light Weight

Easy-change Battery

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Analyzers

Affordable, portable, ready forcable system technicians: digitalchannel 64 and 256QAMtransmission performanceverification measurementsThe DMA120 Serie

Page 2 - Figure 2. BER screen

page 2Qualify System PerformanceThe built-in digital demodu-lator makes possible in-ser-vice measurements of:• Modulation Error Ratio(MER)• Error Vect

Page 3 - Figure 3. Spectrum mode

page 3Estimated BER after R-Sdecoding: BER after R-Sdecoding represents the ser-vice level that the cable sys-tem is providing to the sub-scriber’s TV

Page 4

page 4Adaptive Equalizer DisplayMode: This display indicateslinear impairments such aspoor frequency response andreflections. Tap values showhow hard

Page 5 - Characteristics

page 5DMA 120SeriesCharacteristicsNOTE: All specifications apply across theoperating temperature range (–5 to +40°C)unless otherwise stated. All value

Page 6 - Continued

page 6DMA 120SeriesCharacteristicsContinuedENVIRONMENTALTemperature –Operating: –5 to +40°C.Altitude –Operating: Up to 4,600 m (15,000 ft.).Non-operat

Page 7 - Information

page 7DMA 120OrderingInformationDMA120Digital Modulation Analyzer for ITU-T-J83,Annex B 64QAM.DMA121Digital Modulation Analyzer for DVB-C64QAM.Both In

Page 8

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Atec Tektronix-DMA120-DMA121 User Manual

Browse online or download User Manual for Equipment Atec Tektronix-DMA120-DMA121. Atec Tektronix-DMA120-DMA121 User Manual

Summary of Contents

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