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Tektronix MTS415, Техническое описание

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Specifications

1−12

Version 00b

MTS400 Series Performance Verification and Specifications Technical Reference

Table 1−8: COFDM measurements (Cont.)

Characteristic

Description

EVM (Error Vector Magnitude)

Display Range:

v

 1%  to 

w

 30% rms, for QPSK

v

 1%  to 

w

 20% rms, 16QAM

v

 1%  to 

w

 8.5% rms, 64QAM

Resolution: 0.1%

Accuracy: 1% (1 EVM unit), and an additional 

"

20%

of the reading

MER (Modulation Error Ratio) with an
equalizer

Both MER Peak and MER Average are displayed as
measured across all carriers

Display Range:
6 dB to 37 dB for QPSK (4QAM)
11 dB to 37 dB for 16QAM
16 dB to 37 dB for 64QAM

Resolution: 0.1 dB

Accuracy: 

"

1 dB to 30 dB (Measured at −30 dBm

input in High Resolution mode). For best MER
accuracy, use High Resolution mode, and maintain
the input signal level between −45 dBm and
−15 dBm

Carrier power distribution

Carrier-by-carrier signal-to-noise power ratio is
displayed

Channel Flatness in dB can be viewed from the
spectrum display

Tilt in dB can be viewed from the spectrum display

Channel equalization status

Channel estimate I and Q values for each carrier are
displayed

Constellation

The RF constellation is displayed

BER

Pre-Viterbi BER and Pre Reed-Solomon BER values
are displayed

Post RS BER and TEF (Transport Error
Flag)

Post Reed Solomon BER (uncorrectable error count)
and number of Transport Error Flags are displayed

Содержание MTS415

Страница 1: ...207 00 This document applies to firmware version 1 7 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless y...

Страница 2: ...nd pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektr...

Страница 3: ...ce i Table of Contents General Safety Summary iii Service Safety Summary v Preface vii Related Manuals vii Specifications Electrical Specifications 1 2 Mechanical Characteristics 1 18 Environmental Ch...

Страница 4: ...les Table i MTS400 Series product documentation vii Table 1 1 Platform characteristics 1 2 Table 1 2 A11 and A12 Main MPEG I O card electrical characteristics 1 4 Table 1 3 A170 LVDS ASI SMPTE310M Int...

Страница 5: ...d Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings...

Страница 6: ...or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product...

Страница 7: ...or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconne...

Страница 8: ...Service Safety Summary vi Version 00b MTS400 Series Performance Verification and Specifications Technical Reference...

Страница 9: ...Series product documentation Item Tektronix part number Description MTS400 Series Quick Start User Manual 071 2607 xx English 071 2608 xx Japanese Provides installation and high level operational over...

Страница 10: ...Preface viii Version 00b MTS400 Series Performance Verification and Specifications Technical Reference...

Страница 11: ...al limits specified in this document H The system must be powered from a source maintaining voltage and frequency within the limits described in this document H The system must have been operating con...

Страница 12: ...and one for Record MPEG storage disk I O port SCSI 3 Ultra 160 Micro D68 connector 68 pin RAM 1 GB one SIM of DDRS memory CD ROM drive CD R W DVD R RW DVD R RW Floppy disk drive 3 5 inch 1 44 MB high...

Страница 13: ...rear panel and one on the left front side panel not hot pluggable Mouse port Mini DIN PS 2 one on the rear panel and one on the left front side panel not hot pluggable Printer port IEEE P1284 Bidirect...

Страница 14: ...External reference input 8 12698 MHz 10 MHz 27 MHz External clock input 160 kHz to 25 MHz parallel clock 1 28 MHz to 32 MHz serial clock Amplitude External reference input typical 0 6 dBm peak to peak...

Страница 15: ...tion Output only Connector type D sub 25 pin Data rate 250 kbps to 108 Mbps 107 Mbps maximum in duplex mode Pin assignment 1 DCLK 2 Ground 3 to 10 DATA 7 to DATA 0 11 DVALID 12 PSYNC 13 Shield 14 DCLK...

Страница 16: ...with SMPTE310M interface Bit rate 250 kbps to 213 Mbps 107 Mbps maximum in duplex mode Output Output impedance 75 transformer coupled Voltage 800 mV 10 into 75 load Jitter v0 2 UI Maximum rise fall t...

Страница 17: ...face cont Input Input impedance 75 transformer coupled Voltage 200 mV to 880 mV maximum limit 3 Vpp AC 15 mA DC Data format Bi phase coded compliant with SMPTE310M Input bit rate 19 392 658 5 bps Retu...

Страница 18: ...le Input termination impedance 75 nominal Input return loss 4 dB min 950 MHz to 2050 MHz LNB supply voltage Selectable 13 0 V 1 5 V or 18 0 V 1 5 V with 100 5 watt resistor load LNB supply maximum cur...

Страница 19: ...nd QPSK measurements Table 1 6 8PSK and QPSK measurements Characteristic Description RF lock RF lock is indicated by LED and Status Input level signal strength Range 60 dBm to 30 dBm Resolution 1 dBm...

Страница 20: ...EC 61000 4 3 immunity Compliance COFDM DVB T receptions and demodulation are compliant with ETSI EN300 744 2 K and 8 K transmission modes Tuning resolution 166 7 kHz or smaller increments Tuning accur...

Страница 21: ...rate Guard Interval Value Gross bit rate in the channel Spectrum polarity inverted non inverted Input level signal strength Ranges High Sensitivity mode QPSK 4QAM 85 dBm to 10 dBm 24 dBuV to 99 dBuV...

Страница 22: ...B for 64QAM Resolution 0 1 dB Accuracy 1 dB to 30 dB Measured at 30 dBm input in High Resolution mode For best MER accuracy use High Resolution mode and maintain the input signal level between 45 dBm...

Страница 23: ...w 31 dB with an equalizer Table 1 10 lists the electrical characteristics for the 8VSB measurements Table 1 10 8VSB measurements Characteristic Description RF Lock RF lock is indicated by LED and Stat...

Страница 24: ...1 11 lists electrical characteristics for the QAM Annex B card Table 1 11 QAM Annex B board characteristics Characteristic Description Input frequency range 88 MHz to 858 MHz Input signal level 64 dB...

Страница 25: ...Resolution 1 dB Accuracy 3 dB EVM Error Vector Magnitude Display Range for 64 QAM v1 to w5 rms Display Range for 256 QAM v1 to w2 5 rms Resolution 0 1 Accuracy 1 MER Modulation Error Ratio with Equali...

Страница 26: ...ble 1 14 Video Over IP board Ethernet Optical port Characteristic Description Ethernet Optical Transmitter General Characteristics Optical operating mode Single mode or Multimode Connector type Duplex...

Страница 27: ...Multimode 850 nm using Tektronix supplied SFP module Output power 9 5 dBm to 2 dBm Center wavelength 850 nm 830 nm min 850 nm typical 860 nm Ma Total jitter peak to peak t170 ps Extinction ratio w9 0...

Страница 28: ...ristic Description Classification Fixed location benchtop Cooling airflow Intake is from the front and sides of the instrument Exhaust is to the bottom and rear of the instrument For proper cooling at...

Страница 29: ...0 relative humidity up to 29 C Above 31 C derate linearly to 22 at 50 C Non operating 10 to 80 relative humidity non condensing Altitude Operating 0 to 3000 m 9800 ft Non operating 0 to 12 000 m 40 00...

Страница 30: ...Specifications 1 20 Version 00b MTS400 Series Performance Verification and Specifications Technical Reference...

Страница 31: ...l Safety Summary at the front of this manual H Ensure that the service personnel are familiar with system operation refer to the MTS400 Series MPEG Test System Getting Started Manual You will need the...

Страница 32: ...ng cable connections on the instrument see Figure 2 1 H Connect the 75 BNC to BNC cable between the ASI SMPTE In connector and the ASI SMPTE Out connector H Connect the DB25 to DB25 cable between the...

Страница 33: ...h the assumption that you are performing all of the steps in order If you start the procedures in the middle you will have to review previous steps for instrument setup 1 Start the MPEG Player by doub...

Страница 34: ...the Packet Size is set to 188 NOTE In the MPEG Player menus a check mark appears next to the selected setting for some menu parameters 6 In the Play menu click Clock to open the Clock dialog box shown...

Страница 35: ...in the Base Value entry box b Enter 0 in the Extension Value entry box c Click OK to close the PCR Initial Value dialog box Figure 2 3 PCR Initial Value settings dialog box 10 In the Play menu click S...

Страница 36: ...ng does not matter d Click Update to open the Select Update Item dialog box shown in Figure 2 4 H Select the Continuity Counter check box H Select the PCR PTS DTS check box H Select the TDS TOT STT ch...

Страница 37: ...as the Region 18 Close the Standard dialog box 19 In the TSCA window click Real time 20 Make the following setting changes in the Select Real time Interface dialog box see Figure 2 5 a In the Interfac...

Страница 38: ...vailability and Sync indicators at the bottom left of the analyzer window are green H The bit rate readout at the bottom of the window reads 41 471 Mbps NOTE It is normal if indicators other than the...

Страница 39: ...e far right of the Path entry box to open the Set Recording Name window c In the Set Recording Name window not shown navigate to the F drive on the MTS400 Series system d In the File Name box enter th...

Страница 40: ...tings window with the recording function armed 25 Click the Start button A message appears in the Record Settings window stating that the recording is currently in progress Observe the green bar showi...

Страница 41: ...ngs to open the dialog box shown in Figure 2 7 on page 2 9 b Click on the ellipsis box at the far right of the Path entry box to open the Set Recording Name window c In the Set Recording Name window u...

Страница 42: ...arrow to start playing the transport stream file 33 Verify that the TS rate displayed at the bottom of the MPEG Player window displays the SMPTE310M rate of 19 392658 Mbps see Figure 2 9 Figure 2 9 M...

Страница 43: ...rs at the bottom left of the analyzer window are green H The bit rate readout at the bottom of the window reads 19 393 Mbps NOTE It is normal if indicators other than the TS Availability and Sync turn...

Страница 44: ...ces drop down box select DVB Parallel 44 Click OK to close the Open Transport Stream window After a few seconds the TSCA window opens with the analysis results of the SPI transport stream see Figure 2...

Страница 45: ...TSCA by double clicking the icon on the desktop 48 In the TSCA window close any dialog boxes and select Real time from the toolbar 49 In the Select Real time Interface dialog box click Change in the...

Страница 46: ...ate Firmware and allow the update to complete 54 Note that the Interface Settings are displayed See Figure 2 12 If you want to proceed with analysis you may need to change the settings to suit your lo...

Страница 47: ...ave checked the interface you have completed the Performance Verification procedures Perform the following steps to power off the instrument 1 Select Shutdown from the Start menu After the instrument...

Страница 48: ...Performance Verification 2 18 Version 00b MTS400 Series Performance Verification and Specifications Technical Reference...

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