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TipsTricks

Tips and Tricks Video 138

UTC versus DST With such a title, an initial explanation is needed The UTC time is the Universal time taken at the Greenwich meridian in UK. Its former name was GMT (Greenwich Meridian Time) that was more explicit. Except that in summer, the time in Greenwich is one hour ahead because of a political decision. And it is precisely where DST comes, bringing a subtle nuance into the time actually used in certain countries.
TipsTricks

Tips and Tricks Video 139

Subliminal Picture Detection The use of subliminal pictures appears in the news regularly although their effectiveness has never been truly proven. Indeed, the law prohibiting them on television was born after a pseudo-study of an American who proved to be completely made up. It is therefore more a matter of precaution than anything else. But the law is the law and publishers are severely called to order when they happen to broadcast such images.
TipsTricks

Tips and Tricks Video 140

VPId - SMPTE ST352 - Video Payload Identifyer With the imminent arrival of UHD and its numerous variations, it is important to remember how an equipment can automatically recognize the nature of the signal to be processed with a video payload identifier (VPId). It is easy to understand that if this Id is not correctly entered, then it will lead to errors because the receiver device does not know how to process the incoming data.
TipsTricks

Tips and Tricks Video 141

SDI Data Display Navigation The option DAT or DATA (depending on the type of instrument), allows to visualize and to measure the value of each sample in a video frame. Considering the very high number of samples coming in a video frame, it could be fastidious to find a particular sample. Nevertheless, thanks to some tricks, the navigation from one to another sample is easy and quite fast. Here are 3 tips that you can use to speed up your navigation process
TipsTricks

Tips and Tricks Video 142

Picture Quality BRISQUE is a concept developed by the University of Texas to evaluate in real time and without reference the quality of a video sequence. Based on these algorithms, Tektronix introduces a new TekMOS measurement index that takes into account the quality of the image once decoded and not in its compressed data stream.
TipsTricks

Tips and Tricks Video 143

Stop Display The introduction of HDR cameras on the market adds to the difficulty to measure images and this is particularly the case if an operator has to adjust a mix of SDR and HDR cameras. Moving from one to the other, it will be extremely difficult for him to align the white levels similarly on the two types of cameras. The trick of the Stop display is that the waveform is no longer linear in millivolt, but logarithmic by setting the 0 (corresponding to the 80% white level) in the center of the screen, and that that scale will work for SDR or HDR cameras.
TipsTricks

Tips and Tricks Video 144

Protocole IGMP IGMP is now implemented in measurement tools for monitoring the IP-based baseband video streams. This technique is widely used in the networking world and a short explanation about this subject seems today necessary for our broadcast industry, often unfamiliar with this type of protocol.
TipsTricks

Tips and Tricks Video 145

FOM, a new index of performance All users of SPG8000A with the GPS option on board have seen on the menu and in the alert panel a new index of performance index that is FOM. At a high level, a Figure of Merit is an indicator that a manufacturer makes available for a user showing at a glance how the instrument is performing. It has no scientific value and the user must calibrate it for the different steps. This paper gives some inputs on this concept and how to use it for the SPG8000A.
TipsTricks

Tips and Tricks Video 146

Picture BRIGHT-UP Now that pictures are created for high resolution displays and sometimes with high dynamic range luminance curve, we often receive the question about how to monitor carefully the levels in a video signal directly in the picture. There many ways to measure that and some are well known: Luminance Vector display (see T&T N°109), Diamond display, Spearhead display (see T&T N°66). But there is a particular display for long long time, in all Tektronix oscilloscopes that allows to check very rapidly the level of luminance in the picture itself. This is the bright-up possibility that is switched off by default.

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