EFA_40_22.fm Seite 1 Dienstag, 17. April 2001 10:46 10 TV Test Receiver EFA, Models 40/43 (DVB-T) Comprehensive analysis/demodulation/monitoring of digital terrestrial TV signals N All DVB-T modes supported N Areas of application: production, N Simple, user-friendly operation according to ETS300744 single frequency network installation N Modular design – easy retrofitting of N High-end demodulator and adjustment, monitoring, coverage, options N High-end test receiver research and development, service N IEC/IEEE bus and RS-232-C interface N Standard test receiver N Comprehensive measurement and N MPEG2 decoder option monitoring functions EFA_40_22.fm Seite 2 Dienstag, 17. April 2001 10:46 10 EFA – the test reference for terrestrial digital TV After the successful launch of the first European DVB-T network (Digital Video Standard test receiver (model 40) Broadcasting – Terrestrial) in Great Brit- N Selective receiver ain involving over 1 000 000 subscribers N Typical use in the field where adjacent channels need to be filtered (as of December 2000), DVB-T is gaining N High-end synthesizer with low phase noise ground in Europe at an ever faster pace. N In this context, the new DVB-T models of Excellent price/performance ratio the EFA family of test receivers meet the demand for high-precision reception measurements. Compact in design and High-end demodulator (model 43) featuring comprehensive automatic test N Wideband input (non-selective receiver), tunable functionality, the instrument is ideal for N Typically used for transmitter testing R&D, modulator production testing and N Outstanding SNR, excellent intermodulation characteristics in-service monitoring of TV signals. N High-end synthesizer with extremely low phase noise High-end test receiver (model 43 + option EFA-B3) N Outstanding SNR and improved intermodulation characteristics N Rejection of image frequency and IF N Two additional selective RF inputs (50 Ω and 75 Ω) N Extended frequency range from 4.5 MHz to 1000 MHz 2 TV Test Receiver EFA, Models 40/43 (DVB-T) EFA_40_22.fm Seite 3 Dienstag, 17. April 2001 10:46 10 Models and options for DVB-T Standard test receivers High-end demodulators High-end test receivers Models ➭ 40 12 78 43 33 89 43 33 89 Slots Option Designation Order No. DVB-T B/G D/K or I DVB-T B/G D/K or I DVB-T B/G D/K or I needed EFA-B2 NICAM Demod./Decod. Std B/G or D/K 2067.3610.02 – ❍ ❍ – ❍ 2) ❍ 2) – – – 1 EFA-B2 NICAM Demod./Decod. Std I 2067.3610.04 – – ❍ – – ❍ 2) – – – 1 EFA-B3 RF Preselection 2067.3627.02 – – – ❍ ❍ 2) ❍ 2) N N N 1 EFA-B4 MPEG2 Decoder 2067.3633.02 ❍ ❍ 1) ❍ 1) ❍ ❍ 1)2) ❍ 1)2) ❍ – – 1 EFA-B6 Video Distributor 2067.3656.02 – – – ❍ 3) ❍ ❍ ❍ 3) ❍ ❍ 0 EFA-B7 Switchable Video Bandwidth 2067.3710.02 – ❍ – – ❍ – – ❍ – 1 EFA-B8 RPC Measurement 2067.3727.02 – ❍ ❍ – ❍ ❍ – ❍ ❍ 0 EFA-B10 OFDM Demodulator 2067.3740.02 ✔ ❍ ❍ ✔ ❍ ❍ ✔ ❍ ❍ 1 EFA-B11 6 MHz SAW Filter 2067.3691.00 ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) 0 EFA-B12 7 MHz SAW Filter 2067.3591.00 ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) 0 EFA-B13 8 MHz SAW Filter 2067.3579.02 ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) ❍ ❍ 1) ❍ 1) 0 ZZT-314 Transportation Bag for 3 HU high units 1001.0523.00 ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ 0 Each basic unit has three free slots to take up options. ✔ Included in basic unit N Must be ordered with basic unit ❍ Available – Not applicable 1) Can be retrofitted if option EFA-B10 is built in. 2) EFA-B2 or EFA-B3 or EFA-B4: only one choice possible. 3) Can be retrofitted if option EFA-B4 is built in. Common to all models MPEG2 decoder (option EFA-B4) 8 MHz SAW filter (option EFA-B13) N In-depth measurement capabilities N Realtime analysis to ETR290 N Designed to DVB-T standards N Simple, user-friendly operation N Error report N Adjacent-channel rejection N Modular design – easy retrofitting of N Video and audio output N Meets European standards options N General measurement functions for Video distributor (option EFA-B6)1) Analog and digital functions in one – RF input level N Provides four video outputs (two on instrument – carrier frequency offset front and two on rear panel) EFA models 40/43 belong to the EFA fam- – bit rate offset ily. Using the OFDM demodulator option – BER (before Viterbi, before and 6 MHz SAW filter (option EFA-B11) (EFA-B10), even analog EFA TV test after Reed-Solomon) N Adjacent-channel rejection receivers (models 12 and 78) and demod- N MPEG2 transport stream output N Meets US requirements ulators (models 33 and 89) can be (serial or parallel) upgraded to dual-mode versions: analog N Alarm messages for measurement 7 MHz SAW filter (option EFA-B12) and digital in one unit. functions, internal storage N Designed to DVB-T standards N IEC/IEEE bus and RS-232-C interface N Adjacent-channel rejection 1) only possible with model EFA 43 and if option EFA-B4 (MPEG2 decoder) is fitted N Meets European and Australian standards TV Test Receiver EFA, Models 40/43 (DVB-T) 3 EFA_40_22.fm Seite 4 Dienstag, 17. April 2001 10:46 10 Fully compatible to ETS300744 Characteristics speed data acquisition, Test Receiver EFA N Calculation of I/Q parameters: ampli- is the ideal choice not only in R&D but tude imbalance, quadrature offset DVB-T Test Receiver EFA, fully compatible also in production environments where and carrier suppression, phase jitter, with the ETS300 744 standard, receives, short measurement cycles are essential. SNR and MER (modulation error ratio) demodulates, decodes and analyzes (Fig. 3) OFDM (orthogonal frequency division N Frequency domain displays, multiplex) signals. All key parameters for Features (see figures page 6 to 9) e.g. MER(f), I|Q(f) or interferer demodulating the receive signal can be (Figs 4, 5 and 6) selected automatically or manually: EFA-T, even the basic version, features a N Amplitude, phase and group-delay/ wide range of innovative measurement frequency response displays (Fig. 7) N 6 MHz, 7 MHz or 8 MHz operating functions, allowing comprehensive, in- N Amplitude spectrum, including auto- bandwidth depth signal analysis. As well as measur- matic shoulder attenuation measure- N 2K or 8K OFDM modulation ing general parameters (Fig. 1) such as bit ment to ETR290 (Fig. 8) N QPSK, 16QAM or 64QAM constella- error ratio (BER), more thorough analysis N Long-term monitoring of dedicated tion diagram includes: parameters through the history N 1/2, 2/3, 3/4, 5/6 or 7/8 code rate function (Fig. 9), monitoring time is N 1/4, 1/8, 1/16 or 1/32 guard interval N I/Q constellation diagrams (Fig. 2): selectable from 60 seconds to N α=1, 2 or 4 hierarchical demodulation the number of symbols to be dis- 1000 days N Reed-Solomon error correction played is user-selectable, N Linearity analysis from amplitude 204/188 range: 1 to 999 999 symbols distribution histogram or CCDF N 6 MHz, 7 MHz or 8 MHz SAW filter (Figs 10 and 11) bandwidth (selectable) N Received impulse response within the guard interval – including zoom func- The operating principle of the receiver is tion (Fig. 12) basically the same as that of the other receivers from the EFA family, except for certain functions specified in standards. Realtime signal analysis EFA’s powerful digital signal processing provides fast and thorough analysis of the received DVB-T signal. Analysis is per- formed simultaneously with, but inde- pendently of, demodulation and decod- ing. The MPEG2 transport stream is per- manently available for decoding as well as for vision and sound reproduction. Thanks to its realtime analysis capability, the high number of measured values nec- essary for the complex calculation and display processes are made available for subsequent mathematical/statistical processing in an extremely short, as yet unequalled, time. Because of its high- 4 TV Test Receiver EFA, Models 40/43 (DVB-T) EFA_40_22.fm Seite 5 Dienstag, 17. April 2001 10:46 10 DVB-T: OFDM modulation for terrestrial broadcasting of digital TV signals The DVB-T standard employs OFDM The IF signal is converted to the baseband Data packets are then applied to the (orthogonal frequency division multiplex) using a numeric control oscillator. A Fast Viterbi convolutional decoder, data de- modulation. This modulation is applied to Fourier Transform (2k or 8k) translates the interleaver (outer de-interleaver), Reed- the downconverter module (selective or signal from the time domain to the fre- Solomon decoder and data de-randomizer non-selective, depending on the model) quency domain. Then, channel estima- (energy dispersal). Finally, the MPEG2 which converts the signal to a 36 MHz IF. tion is used to correct the signal’s ampli- interface feeds the demodulated MPEG2 It can then be filtered by different SAW tude, phase and delay (continuous and transport stream to the hardware output filters (depending on the occupied band- discrete pilots are used for this task) to interface (TS SPI or TS ASI). width), and Gaussian noise can be inter- eliminate most of the degradation intro- (see Fig. below). nally added for margin measurements. duced during RF transmission. Block diagram of TV Test Receiver EFA, models 40/43 (DVB-T) Demodulator and decoder modules, options EFA 12/20/40/50/72/78 Selective IF (picture only) Audio RF input Attenuator Selective Analog TV 0 dB to 55 dB transposer demodulator 50 Ω or 75 Ω Video Switchable video IF input bandwidth EFA 23/33/43/53/83/89 + with optional RF preselection (EFA-B3) EFA-B7 Selective Residual picture RF input Attenuator Selective Video distributor carrier measurement 0 dB0… to55 55 dB dB transposer EFA-B6 50 Ω and 75 Ω EFA-B8 Pilot deviation Video Non-selective measurement Attenuator- EFA-B9 RF input Non-selective