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Tips and Tricks Video 126

Tips and Tricks Video 126

The HD-SDI CRC’s – What a story ! (French and English document) It is well known, that in HD-SDI, each line has its own dual CRC control packet in order to check separately the luminance and the chrominance of a signal. It is less known how it works really. This note is giving the basic knowledge in order to understand the process involved in this technology maintaining the integrity of the data in a digital path. At the same time, it will explain a bit more the interest of the data display available in oscilloscopes.
Tips and Tricks Video 123

Tips and Tricks Video 123

DARS phase evaluation (French and English document) The DARS signal is sometimes created in another equipment than a SPG. In this case, it is necessary to check regularly the phase of this DARS compared to the video Sync of the system. As a matter of fact, these two signals must be synchronous and stable otherwise clicks and pops suddenly appear. But this is not easy to do so, since one signal is analog and the other is digital, and on top of that it’s necessary to compare the BB with the content of the AES signal and not with the clock ! The trick to do that is to use a traditional oscilloscope able to trigger on a user-defined pattern in a digital stream.
Tips and Tricks Video 124

Tips and Tricks Video 124

PTP – A new reference (French and English document) To deploy systems interconnected with IP links, the most difficult issue to solve is synchronization of all the equipment’s with a unique clock. With this in mind, an old standard has been adapted for Broadcast applications: PTP (Precision Time Protocol). Originally, this technology has been used by banks for High Frequency Trading operations in order that all computers in the world have a unique clock that is millisecond accurate. This protocol has now been adapted for Broadcast applications and is well described in the recommendation SMPTE ST 2059-2.
Tips and Tricks Video 125

Tips and Tricks Video 125

Video on optical fiber measurement (French and English document) Because optical connection solutions are easier to use and manipulate, they are becoming increasingly popular in the broadcast industry. Nevertheless, when a difficulty occurs in deploying the solution, it is useful to have an equipment able to check the main parameters of the transmission path. This is precisely what the SFP option of the WFM2300 does and here are some tricks on how to use it appropriately.
Tips and Tricks Video 129

Tips and Tricks Video 129

SDI outputs – Which one to use ? (French and English document) Since scopes are now 3G compatible, a passive loop-through is not possible anymore because at these frequencies the metallic continuity would represent a real antenna bringing a lot of interferences in the signal. The waveform monitor outputs are then all active and it means that without mains, no signal is available on these connectors. But there are many output connectors. So witch one to select and how to choose and to set the right one ?
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Tips and Tricks Video 133

GPS antenna connection It is a FAQ to know what kind of antenna to use in a GPS installation and how to be sure that the signal at the input of the SPG is correct. It is important first to understand that the GPS receiver is inside the SPG8000A itself and then the available connector on the back side is an Antenna connector. Knowing that, it is important to take some elementary cares about how to wire the antenna in the generator.
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Tips and Tricks Video 134

UHD test signal generator A valid test signal is one of the first requirements when starting the evaluation and/or the deployment of a new signal format. Thus, since UHD is arriving in production studios, it would be convenient to have a UHD color bars pattern available. However, a specific UHD signal generator appears to be an overkill for a simple test or occupancy signal. For this reason, a tip in the SPG8000A allows to generate a valid UHD bar chart using its SDI option.
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Tips and Tricks Video 135

SpyderCube for HDR adjustments To balance video cameras, vision engineers typically use a grey scale test chart and a waveform monitor, which allows them to adjust multiple cameras identically with the same color grading. When shooting with High Dynamic Range, it is necessary to pay attention to the very bright picture parts, the so-called “specular highlights” that are brighter than the white bar with 90% reflectance in a grey scale test chart. In this context, a small accessory will become very useful and that is the trick we want to share with you today.
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Tips and Tricks Video 136

Last Firmware release Most of the measurement equipment’s are now operating with programmable microprocessor FPGA and it is necessary sometimes to check whether a new version is available in order to get it on the web. It appeared interesting for the NAB month to summarize the current production releases actually available on line.

Items 28 to 36 of 47 total

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