Rohde_Schwarz_UAF_22 电路图.pdf

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1、 Ease of operation 3 signal inputs 25 video parameters Limit monitoring Full-field measurements Convenient result display Freely selectable test signal Memory card Printer interface Remote control (IEC/IEEE bus) Small dimensions Video Analyzer UAF Perfection in video analysis UAF_22.fm Seite 1 Diens

2、tag, 10. Oktober 2000 2:20 14 RadioFans.CN 收音机爱 好者资料库 2 Video Analyzer UAF Brief description Rapid Precise Reliable Measurement accuracy for satisfying stu- dio quality requirements and measuring times in the seconds range these are the standards which have to be met in present-day automatic video m

3、easure- ment engineering. Thanks to its outstand- ing characteristics, Video Analyzer UAF from Rohde storage of up to eight test configurations is possible. Thanks to its variable integration time, the UAF can be adapted to all test condi- tions. Using the shortest integration time of less than 1 s,

4、 the UAF is ideal for all alignments, be it in the studio or in pro- duction. In the case of very noisy VTR sig- nals, on long transmission links or at the end of a long line of transposers, increas- ing the integration time to 2.5, 5 or 10 s always yields stable results. For measurements in the fie

5、ld, on cable net- works or at inaccessible points in transmitters, it is not necessary to bring along a com- puter or printer to log data. Using a plug-in memory card, customer- defined test and data-logging programs can be loaded and the test results also stored on the card. Moreover, the memory ca

6、rd permits stor- age of complete instrument setups: limit values, test parameter definitions, filter settings in the case of noise voltage mea- surements as well as line numbers of the eight test configurations. Thus any mea- surement can be reproduced. For use in quality and production control of v

7、ideo recorders, the UAF also handles the S-VHS component signals Y/C. Distorted test signals due to jitter or head switchover for instance do not affect the operation of the UAF. A selection of the manifold applications of the UAF UAF_22.fm Seite 2 Dienstag, 10. Oktober 2000 2:20 14 RadioFans.CN 收音机

8、爱 好者资料库 Video Analyzer UAF 3 Mode 1Mode 4Mode 2Mode 3Mode 5 Mode 6Mode 7Mode 8 Operation The logical arrangement of the UAF front- panel controls offers a clear overview of its functions and ensures ease of opera- tion. Each parameter is assigned its own key. The associated LED above the key blinks

9、if the limit values are exceeded. Thus all parameters can be checked at a glance for adherence to set limits. The illuminated LC display shows the result in large figures which are easy to read even from some distance. Several parameters can be displayed at the same time in small characters. For cer

10、tain appli- cations, eg alignment, the bar indication proves useful. The complete device setup and the selected limit values are contained in the upper lines of the display. The lower part shows the function of the unlabelled keys. These softkeys offer user prompting with respect to the displayed me

11、asured value or the called function. The small keypad to the left of the display permits the setup menus of the UAF to be selected directly. Such a menu is inserted as a window above the normal result dis- play. So it is possible to use the softkeys for changing general settings such as selected inp

12、ut, synchronization or printer mode. Further test parameters, eg an external level or future extensions, can be called up using the “option” function. For integration into computer-controlled test systems, all functions of the UAF can be remote-controlled via an IEC/IEEE-bus interface. The UAF can a

13、lso be used as the controller. If parameter logging is required for acceptance test measure- ments, a printer can be connected directly to the Centronics interface. Test signal eg CCIR 17, 10T pulse/20T pulse Test line eg CCIR 17 in line 19 Limit values eg BARSet 1: +10% / 15% Set 2: +15% / 20% Hyst

14、eresis: 3% For rapid recall, for instance within a test routine, the UAF is able to store up to 8 test configurations (modes 1 to 8) Parameter definitions eg S/N, weighting filter on/off The test results are displayed either in the form of numerical values or as bars UAF_22.fm Seite 3 Dienstag, 10.

15、Oktober 2000 2:20 14 RadioFans.CN 收音机爱 好者资料库 4 Video Analyzer UAF Special modes Difference measurement This mode permits signal errors at the input of the device under test (DUT) to be eliminated. For this purpose the input sig- nal of the DUT is applied to channel A and the output signal to channel

16、 B of the UAF. In this way it is possible to perform mea- surements on a transposer system or a cable headend receiving incorrect input signals. Thanks to the high display accuracy of the UAF, the difference measurement mode is also suitable for high-precision studio measurements on components such

17、as routing switchers which feature stringent tolerances. Reference measurement In this mode only one input of the UAF is connected to the DUT, the first test cycle being stored as the reference. This mode facilitates determination of the effect of the environment (EMC, climate, etc) on video generat

18、ors in the lab and in servic- ing. Automatic test sequence The AUTORUN menu allows test sequences to be programmed on the UAF front panel; these sequences are exe- cuted automatically and can be repeated cyclically using the built-in realtime clock. An AUTORUN routine may for instance ensure input s

19、witchover, mode variation, limit monitoring and result logging. Since the UAF is able to act as a controller for other instruments, its controller func- tions can be included in an AUTORUN routine. Thus it is for instance possible to send commands to the IEC/IEEE-bus- compatible TV Test Receiver EMF

20、T (data sheet PD 756.4843) in order to set the receive channel. Without the use of a controller, the UAF and EMFT are able to set all channels of a cable network, mon- itor the signal quality and print error logs in the AUTORUN mode. This capability can even be extended when using the Video Selector

21、 VSF. Description and technology The combination of analog signal condi- tioning and digital result processing is the basis of the powerful performance of the UAF and all this in spite of its small size. In the analog section, the video signal is processed in parallel by different preci- sion test c

22、ircuits for chrominance and luminance measurements. An A/D con- verter digitizes both the test circuit output voltages and parts of the video signal directly. Its 12-bit resolution together with the precise analog circuitry ensure the unique measurement accuracy of the UAF. The core of the digital s

23、ection is a micro- processor plus an arithmetic coprocessor. It rapidly calculates the results from the samples avaraging them over the integra- tion time. The computing power is such that all test parameters are constantly calculated, updated and monitored with- out leaving out any samples. In addi

24、tion, the keypads, interfaces and the memory card are serviced. CCVS AB DUT (eg video generator) Environmental test chamber Initial results stored Reference measurement start wait 1 h input A select mode set EMFT to next channel set channel on EMFT limit fail? test complete? printout yes no no yes E

25、xample of AUTORUN routine out Routing switcher Input Output CCVS CCVS AB in Difference measurement UAF_22.fm Seite 4 Dienstag, 10. Oktober 2000 2:20 14 Video Analyzer UAF 5 Specifications Test parameterKey labelMeasurement range ResolutionError limits1) at nominal Additional max. error per 1% (1, 1

26、ns) departure from nominal Luminance bar amplitudeBAR AMPL100% to +100%0.1%0.3%0.015% Black level distortionBASELINE DIST20% to +40%0.1%0.3%0.045% Tilt of luminance barTILT40% to +40%0.1%0.3%0.045% 2T pulse amplitude2T AMPL50% to +50%0.1%0.5%0.03% 2T K factor2T K FACTOR0% to +10%0.1%0.7%0.03% Lumina

27、nce nonlinearityLUM NL0% to +50%0.1%0.5%0.01% Residual picture carrierRES PC0% to +30%0.1%0.3%0.015% Sync pulse amplitude Reference = signal Reference = nominal SYNC AMPL50% to +50% 80% to +100% 0.1% 0.1% 0.5% 0.5% 0.01% 0.01% Line-synchronous control Memory card Graphics display P Analog chrominanc

28、e processing Input amplifier Analog luminance processing Keypad A D CCVS 1 (S-VHS Y) CCVS 2 (S-VHS C) CCVS 3 Sync ext. Test output IEC busCentronics Rear panel of UAF Block diagram of UAF ISO 9001 Certified Quality System DQS REG.NO 1954 UAF_22.fm Seite 5 Dienstag, 10. Oktober 2000 2:20 14 6 Video A

29、nalyzer UAF Colour subcarrier gain CCIR 331 C/L GAIN50% to +50%0.1%1.0%0.02% CCIR 1750% to +50%0.1%1.0%0.02% Chrominance / luminance intermodulation CCIR 331 C/L INTERMOD50% to +50%0.10.3%0.01% CCIR 1750% to +50%0.1%1.0%0.02% Chrominance / luminance delayC/L DELAY500 ns to +500 ns1 ns5 ns0.01 ns Dif

30、ferential gain positive / negative peak-to-peak DIFF GAIN50% to +50% 0% to +100% 0.1% / 0.01%2) 0.1% / 0.01%2) 0.3% 0.5% 0.025% 0.015% Differential phase positive / negative peak-to-peak DIFF PHASE50 to +50 0 to +100 0.1 / 0.012) 0.1 / 0.012) 0.3 0.5 0.025 0.015 Nonlinearity of colour subcarrier gai

31、n positive / negative peak-to-peak C NL GAIN50% to +50% 0% to +100% 0.1% 0.1% 0.7% 1.0% 0.025% 0.02% Nonlinearity of colour subcarrier phase positive / negative peak-to-peak C NL PHASE50 to +50 0 to +100 0.1 0.1 0.7 1.0 0.025 0.02 Burst amplitude Reference = signal Reference = nominal BURST AMPL50%

32、to +50% 80% to +80% 0.1 0.1 1.0% 1.0% 0.02% 0.02% Multiburst amplitudeMULTIB 1 to 680% to +50%0.1%1.0%0.02% Luminance signal/noise ratioS/N25 dB to 80 dB0.1 dB1 dB Intermodulation between colour subcarrier and sound carrier C/SND INTERMOD 30 dB to 70 dB0.1 dB1 dB HumHUM6 dB to 60 dB0.1 dB1 dB DC mea

33、surement5 V to +5 V5 mV10 mV Basic amplitude of video data50% to +50%0.1%1%0.01% Incidental carrier phase modulation7 to +450.110.01 1)With difference and reference measurement modes, attainable error limits are 2 digits for all parameters. 2)Higher resolution for difference and reference measuremen

34、ts. Test parameterKey labelMeasurement range ResolutionError limits1) at nominal Additional max. error per 1% (1, 1 ns) departure from nominal UAF_22.fm Seite 6 Dienstag, 10. Oktober 2000 2:20 14 Video Analyzer UAF 7 Signal inputs3 video inputs, 75 loopthrough filters, 3 x CCVS or 1 x Y/C and 1 x CC

35、VS, adjustable Level1 V pp 6 dB Return loss up to 10 MHz40 dB Decoupling of inputs up to 10 MHz85 dB Synchronization Internaloptionally from one of the three inputs, sync pulse level 300 mV 6 dB External1 input, loopthrough filter, nominal level 2 V/4 V into 75 (V pp) SISpermissible Parameters25 tes

36、t parameters, direct key selection Noise voltage Measurement moderms Filter200 kHz highpass and video filter inte- grated, weighting filter and colour sub- carrier trap can be connected Inherent S/N ratio83 dB Referenceluminance bar or 700 mV nominal, selectable Differential gain/phase Evaluation4 o

37、r 5 steps (selectable) Hum Measurement modepeak-to-peak Filter1 kHz lowpass integrated Referenceluminance bar or 700 mV nominal, selectable Special functions SETUPsetting of test signal, test lines, ON state, display mode, limit values, IEC/ IEEE-bus address, printer type, date and time MEAS TIMEmea

38、suring time 1/2.5/5/10 s, selectable MEAS HOLDmeasured values of all parameters are simultaneously frozen PRINTmeasured value output via printer (Centronics interface) MONITORINGlimit monitoring of single parameters, parameter groups or all parameters; two upper and two lower parameter limits freely

39、 adjustable for every mode Limit monitoringout-of-limit indication by blinking of associated LED, acoustic alarm can be switched on, error logging AUTORUNentry and recall of user-defined test rou- tine Difference measurementselectable between two inputs (measur- ing time doubled) Reference measureme

40、ntone test cycle stored as reference Indication LC display, display mode selectablenumerical, 1 parameter numerical, 3 parameters numerical with bar display Types of indicationmeasured value, limit values, major modes, prompting LanguageGerman, English, French or Italian Interfaces and outputs IEC/I

41、EEE businterface to IEC 625-2/IEEE 488-2 PrinterCentronics interface Memory cardstorage of measured values, limit values and parameter definitions, device set- ups and user-defined test routines Monitor outputclamped test signal, also for display of measurement timing, level same as input signal 1%,

42、 75 Zero reference control2.5 V pp 10% into 75 , position and duration adjustable General data Rated temperature range+5C to +45C (application class I to IEC 359) Power supply100/120/220/240 V 10%, 47 Hz to 63 Hz, 115 VA, safety class 1 Dimensions (W x H x D)435 mm x 103 mm x 460 mm Weight10 kg Orde

43、ring information Video Analyzer UAF Standard B/G2013.0807.02 Standard I2028.5768.05 Standard M2028.5774.02 Standard D/K2028.5780.02 Accessories supplied Power cord Spare fuses Manual Four 75 Terminations RMF 2 Memory card 32 Kbyte Options Documentation of calibration valuesUAF-DCV2082.0490.02 UAF_22

44、.fm Seite 7 Dienstag, 10. Oktober 2000 2:20 14 Printed in Germany09/00 (Pe EDok/ko) ROHDE&SCHWARZ GmbH&Co. KG Muehldorfstrasse 15 81671 Munich, Germany P.O.B. 801469 81614 Munich, Germany Telephone +49894129-0 www.rohde- CustomerSupport: Tel. +491805124242, Fax +4989 4129-13777, E-mail: CustomerSupportrohde- PD 756.8726.22 Video Analyzer UAF Trade names are trademarks of the owners Subject to change Data without tolerances: typical values UAF_22.fm Seite 8 Dienstag, 10. Oktober 2000 2:20 14