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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 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 127

Tips and Tricks Video 127

The MD5 code – How it works (French and English document) MD5 acronym is very often used in the telecommunication industry since it became a generic term similar to an Escalator or a Frigidaire. But it is less known what is hidden behind these letters. Following the polynomial calculations of last month, here is a paper introducing the basics of this system and how to use it in the Aurora file-based QC solution.
Tips and Tricks Video 128

Tips and Tricks Video 128

When Power Cord matters (French and English document) Nothing is more simple than a power cord ! But it’s not completely true when security matters. As a matter of fact, for equipment that is so important that requires redundancy, this parameter has to be considered. And who has never unplug a power cord by mistake? Particularly when synch generators are concerned, all details are important.
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 ?
Tips and Tricks

Tips and Tricks Video 130

AS-10PAD Versus AS-11 DPP (French and English document) After many months of discussion, the French television trade organizations have adopted a common format for the file exchanges between technical industries and broadcasters. The adopted format in France is based on the AS-10 international standard form AMWA while on the UK side, they have adopted the AS-11 standard within the DPP organization. What are the differences
Tips and Tricks Video

Tips and Tricks Video 131

TS-DF measurement (Time Stamp Delay Factor) (French and English document) In our Broadcast industry, the advent of IP transport requires to adapt to new techniques and to become familiar with new indicators. The IP has a long life and measurement techniques too. However, new algorithms had to be developed in order to adapt to Broadcast. It is in this context appears now the TS-DF indicator that measures the jitter of a network and its cumulative effect over time.

Items 1 to 9 of 25 total

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