TektronixメーカーVM700Tの使用説明書/サービス説明書
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VM700 T (turbo) V ideo Measurement Set Option 11 P AL V ideo Measurements M any capabilities in one instrument – Digitizing waveform monitor – Digitizing vectorscope – Picture Display – Group .
modem to report measurement r esults or control a signal router . A relative to reference mode allows normalizing to a signal source or eliminate signal path errors from the desired measurement.
Vertical interval test signals can be seen very clearly for additional analysis of the signal. These can be printed as support documentation for automatic measurement results. E ven a single horizontal synchronization pulse can be displayed at a high intensity .
Bar Line Time measurement. Chrominance to Luminance Gain and Delay measurement. MEASURE MODE 1,2 BAR LINE TIME A bsolute Relative M easurement Range Mode Mode Accuracy Accuracy B ar Level (b1 or Back Porch) 300 mV to 1.4 V ± 0.5% ± 0.2% S ync Level 50 mV to 600 mV ± 0.
Chrominance Non-Linearity measurement. Color Bar measurement. Luminance Level (mV ) Luminance Level (mV ) Chrominance Level (mV ) Chrominance Level (mV ) Chrominance Phase (deg) Chrominance Phase (deg) Gray Gray Yellow Yellow Cyan Cyan Green Green Magenta Magenta Red Red Blue Blue Black Black 0.
Frequency Response and Group Delay measurement using Sin X/X. Horizontal Timing measurement. M EASURE MODE (continued) FREQUENCY RESPONSE AND GROUP DELA Y A bsolute Relative M easurement Range Mode Mode A ccuracy Accuracy F requency Response to 5 MHz ± 40 dB ± 1.
LINE FREQUENCY M easurement Range Accuracy L ine Frequency ± 3% ± 0.1% F ield Frequency ± 3% ± 0.1% LUMINANCE NON-LINEARITY Absolute Relative M easurement Range Mode Mode A ccuracy Accuracy L uminance Non-Linearity 0 to 100% ± 0.4% ± 0.2% K-factor measurement.
VERTICAL BLANKING M easurement Range Absolute Mode Accuracy E qualizing Pulse Width 80 ns to 1 µs ± 10 ns B road Pulse Width 80 ns to 1 µs ± 10 ns V ertical Blanking Field 1 19 to 30 lines NA Vertical Blanking Field 2 19 to 30 lines NA Noise Spectrum measurement.
AMPLITUDE AND PHASE MEASUREMENTS (continued) M easurement Range Accuracy ITS Element Standard D ifferential Gain 0 to +100% ± 0.3% D2 CCIR Rec. 569 ( Peak and p-p) (0% nominal) D ifferential Phase 0 to 360 deg ± 0.
Unified Unweighted filter response curve per CCIR Recommendation 567. 0 –5 5 08 M Hz d BV –5 – 10 – 15 –2 0 –2 5 –3 0 –3 5 –4 0 – 45 –5 0 1 234 5 67 U nified Luminance weighted filter response curve per CCIR Recommendation 567. 0 – 14 05 MHz dBV .
Measur ement r esults are displayed in an easy-to-read format indicating the time, signal source, measurement, and whether the measured value exceeded caution (*) or alarm (**) limits.
Measurement methods The following paragraphs specify the methods for each Option 11 measurement. Where appropriate, reference is made to the relevant CCIR recommendation. Line blanking timing measurements Color Burst Duration: Measured between the half-amplitude points of the burst chrominance envelope.
Other timing measurements B ar Rise T ime: M easured between the 10% and 90% points on the leading edge of bar . See element B2. A mplitude and phase measurements Sync Amplitude Error: Measured as the difference b etween the sampled sync pulse amplitude and a nominal 300 mV amplitude.
C/L Gain Inequality: Measured as the difference between the sampled peak-to-peak ampli- tude of the 700 mV (nominal) chrominance packet (G1 or G2) and the sampled amplitude of the luminance bar (also nomi- nally 700 mV). Result expressed as a % of sampled bar amplitude.
Frequency response measurements M ultiburst Flag Amplitude: Measured from the center point of the flag top to the ensuing bottom of the flag. Result e xpressed as % of sampled bar a mplitude.
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デバイスTektronix VM700Tの購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Tektronix VM700Tをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはTektronix VM700Tの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Tektronix VM700Tの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Tektronix VM700Tで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Tektronix VM700Tを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はTektronix VM700Tの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Tektronix VM700Tに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちTektronix VM700Tデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。