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Analysis of DVB-T2 signalswith the R&S ETL TV AnalyzerWebinar WS-12-003

Werner Duerport7BMP

Product Manager

Broadcasting T & M Products

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Targets of this Webinar

l The R&S ETL TV Analyzer and its options for the analysison DVB-T2 signals are known

l You are able to configurate a R&S ETL for DVB-T2,

aligned to a customers application

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Topics

l The concept of the R&S ETL with its main DVB-T2 options

l Measurements at a DVB-T2 transmitter site

l RF signal quality at a transmitter output

l Analysis of an incoming MPEG-2 and T2-MI transport stream

l Measurements in the field

l Echo pattern of a single frequency network (SFN)

l SISO / MISO

l Coverage measurements with R&S ETL and drive testsoftware R&S BCDRIVE

l Short example

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The concept of the R&S ETL

with its mainDVB-T2 options

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FPGA based demodulators

= software based demodulator = hardware based demodulator

Field

ProgrammableGate

Array

R&S ETL

Base unit

R&S ETL-B300

FPGA Extension

R&S ETL-K340

DVB-T2 Firmware

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Selection of DVB-T2 modulation standard

MODE TV/Radio Analyzer/Receiver Digital TV Digital TV Settings

Use Auto/Preample Detection

recommended

a manual frame and PLP definition

can be done for single PLP only

(expert mode)

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Measurements at a DVB-T2 transmitter site

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RF signal quality at the transmitter output

R&S ETL

The most important RF measurements are:

- frequency spectrum after the channel filter- amplitude response, group delay and phase

- DVB-T2 modulation parameters

- signal quality of modulator and amplifiers

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Special setting for transmitter measurements

The R&S ETL offers for different applications different

System Optimization Settings

Slow/Laboratory

l for stationary use at atransmitter site and laboratory

l offers the best measurement

performance

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Frequency spectrum measurements

Analysis of frequency

spectum withlSpectrum Analyzer mode

lTV Analyzer/Receiver mode

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Frequency spectrum measurements

Shoulder Attenuation

laccording toETSI TR 101290

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Frequency spectrum measurements

Carrier to Noise (C/N)

lchangeable position of noisefloor measurement

lchangeable noise BW

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Frequency spectrum measurements

Analysis of frequency

spectum by markerslup to four markers

labsolute and delta marker

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Amplitude response, group delay, phase

lcombined measurement of

Amplitude, Phase and GD

lPeak to Peak list

lAuto Range function

lmanual scalling ( ) and

positioning of amplitude

trace ( )by cursor buttons

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DVB-T2 modulation parameters

P1 signalling for synchronization, FFT mode, SISO/MISO

L1 pre-signalling Guard interval, Pilot Pattern, Cell ID, PAPR,

parameters of L1-post signalling (FEC, constellation)

L1 post-signalling number of PLPs, PLP IDs, FEC and constellation of

each of PLPsPLP = Physical Layer Pipe

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L1 pre-signalling

Modulation parameters of L1 post-signalling

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L1 post-signalling

Multiple PLP with 5 PLPs red frame

decoding and data of PLP ID 0 (manually selected) yellow frame

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Output of decoded PLP (in case of MPEG-2 TS)

MPEG-2 transport stream via ASI OUT of base unit

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L1 post-signalling: Preview on PLP data

preview of PLP ID 4 red frames

still decoding of PLP 0 (manually selected) yellow frame

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Overview

general DVB-T2 data with MER (L1, rms) red frame

PLP data of decoded PLP with specific MER yellow frame

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Modulation analysis by constellation diagram

P1 Symbol

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Modulation analysis by constellation diagram

L1 pre-signalling

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Modulation analysis by constellation diagram

L1 post-signalling

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Modulation analysis by constellation diagram

before Derotation

PLP ID 0 (256QAM)

PLP ID 4 (64QAM)

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Long-term test with Measurement Log

Measurement Log

R&S ETL-K208lfor long-term tests (e.g. 24h)

lrecording of most important

DVB-T2 signal parameters

ldetection of sporatic effectsby min and max detector

lexport function

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Quality of supplied signal at the transmitter input

R&S ETL

The most important parameters are:

- structure of incoming transport stream (TS)

- correct network and service information

- the right payload (services)

- low PCR jitter

- guaranteed data rates

MPEG-2 TS

orT2-MI

T2-MI = T2 Modulator Interface

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Options for the analysis of MPEG-2 TS and T2-MI

MPEG Processing Board R&S ETL-B280 hardware for analyis on transport streams

MPEG Analysis/Monitoring R&S ETL-K282 fundamental analysis on transport streams

In-Depth Analysis R&S ETL-K283 table interpreter, PCR jitter

DVB T2-MI Extension R&S ETL-K382 analysis on T2-MI baseband signals

TS ASI IN

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Fundamental TS analysis with ETL-K282

lanalysis of MPEG-2 TS

structure and serviceslmeasurements according to

ETR 290 Prio 1 to 3

lbit rates

ltable repetition

MODE TS Analyzer

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In-Depth analysis with ETL-K283

lanalysis of network and

service informationlmeasuring of PCR jitter

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Analysis of a T2-MI signal with ETL-K382

lanalysis of T2-MI TS errors

lanalysis of T2-MI structure

input configuration for T2MI

selecting of specific BB frameselecting of table or service

analysis of table or service

with ETL-K282 and ETL-K283

lanalysis of MPEG-2 TS

structure and services

lmeasurements according toETR 290 Prio 1 to 3

lbit rates

ltable repetition

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Additional MPEG options

Video and Audio Hardware DecoderR&S ETL-B281

HDTV and Dolby UpgradeR&S ETL-K281

G

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Additional MPEG options

MPEG TS Generator/ RecorderR&S ETL-K280

T2-MI Stream LibraryR&S SFU-K227

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SFN (Single Frequency Network)

measurementsin the field

DVB T2 i l f t k t

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DVB-T2 single frequency network measurements

all received DVB-T2 transmitters

must be within the guard interval

Tx1, RF1

Tx4, RF1

Tx5, RF1

Tx3, RF1

max. distance

Tx2, RF1

all frequencies of the received DVB-T2

transmitters must be the same

Th R&S ETL d f fi ld t

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The R&S ETL, ready for field measurements

RF PreselectorR&S ETL-B203

+

f

Llthe RF preselctor reduces

the danger of an

overloaded RF input

lthe RF Preselctor improvesthe sensitifity by an

additional pre-amplifiere

Broadcasting frequency spectrum

digital channel filter

of R&S base unit

RF

S i l tti f fi ld t

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Special setting for field measurements

The R&S ETL offers for different applications different

System Optimization Settings

Fast/SFN

lfor stationary SFNmeasurments

DVB T2 E h tt SISO d

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DVB-T2 Echo patternSISO mode(Single Input, Single Output)

DVB-T2 specific parameters in the status lines

C fi ti f E h tt t

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Configuration of Echo pattern measurement

lunits s, m, miles

llevel relative or absolute

ltime range normal, extented

(SISO only)

lpeaklist sorted by level or

time

lFrequency offset with

R&S ETL-K341

DVB T2 E h tt SISO d

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DVB-T2 Echo patternSISO mode

equal distances to the edges of a GI, for a more robust synchronization

DVB T2 E h tt SISO d

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DVB-T2 Echo patternSISO mode

equal distances to the edges of a GI, for a more robust synchronization

SISO / MISO d ith DVB T2

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SISO / MISO mode with DVB-T2

SISO = Single InputSingle Output

MISO = Multiple InputSingle Output

MISO mode ith DVB T2

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MISO mode with DVB-T2

all Tx 1 - MISO group 1

all Tx 2 - MISO group 2

DVB T2 Echo pattern MISO mode

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DVB-T2 Echo patternMISO mode

sum of MISO echoes

DVB T2 Echo pattern MISO mode

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DVB-T2 Echo patternMISO mode

echoes of MISO group 1 & 2

MISO Tx group 1

MISO Tx group 2

MER (f) in the field

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MER (f) in the field

very useful for discovering interferer

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Coverage measurements with

drive test softwareR&S BCDRIVE

DVB T2 coverage with R&S BCDRIVE

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DVB-T2 coverage with R&S BCDRIVE

l compact and cost

effective solution

l recording of relevant

signal parameters

with echo pattern

l Export function to

- GoogleEarth

- MSExcel

DVB T2 coverage with R&S BCDRIVE

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DVB-T2 coverage with R&S BCDRIVE

l quick overview of

signal quality withincovered area

l detailed statistics

R&S ETL TV Analyzer

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R&S ETL TV Analyzer

Ready for DVB-T2

The best solution on the market

Analysis of DVB T2 signals

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Analysis of DVB-T2 signalswith the R&S ETL TV AnalyzerWebinar WS-12-003

Questions & Answers