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Author Archives: Phil
Graded Index fibre optics
In fibre optics, a graded-index or gradient-index fibre is an optical fibre whose core has a refractive index that decreases with increasing radial distance from the fibre axis (the imaginary central axis running down the length of the fibre). Because … Continue reading
Extending Sony 8-pin camera remotes
How far can the camera control signals from any smaller Sony camera go? If you talk to Mr Sony it’s around 50m (the longest cable they sell) – but as the pictures (below) suggest it’s at least the length of … Continue reading
Tektronix WVR5200
During a manic day I was fortunate enough to bump into my old Tektronix mucker Tom Perry who had a new WVR5200 in his rucksack and gave me a quick in-the-street demo! It seems like a much more complete instrument … Continue reading
Sony BVM-E250 OLED broadcast monitor
I had an hour or so to set up a new Sony OLED grade-1 next to a Vutrix HD Pro-24 (their grade-1 LCD display which I like) – the Sony is much more expensive than the Vutrix . OLED as … Continue reading
Things that peaked my interest at IBC
I spent just a couple of days over at the RAI in Amsterdam. It was splendid to catch up with some old pals and Bryant Broadcast do an excellent night out. My main observation is that 3D/stereoscopic was no where … Continue reading
Ever need to slow down Ethernet?
I’ve had a few occasions when I’ve had to force gigabit down to 100BaseT or even 100 down to 10BaseT. My preferred method is to force the NIC down to the appropriate speed but if you aren’t using Windows (OS-X, … Continue reading
Old SVHS machines, the half line and archive ingest
As every superhero knows it’s the second half of line 23, field one, that active content starts in a PAL signal yet come the start of field 2 line 336 starts as a full line with the corresponding half line … Continue reading
Posted in Broadcast Engineering, SI
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Rise times in HD TriSyncs
These are two traces from two separate TriSync generators – The blue trace represents a correct waveform and as every superhero will realise you’re looking at the line timing pulse. Here is the diagram from rec-709 (the spec for HD … Continue reading
Video and high-speed networks – article in Broadcast Engineering Magazine
Read the article on BE’s site; As video data rates increase, installation engineers must become as familiar with fibre as they are with coax. Many types of fibre and twisted-pair copper must be purchased pre-terminated. Runs of 3Gb/s in copper … Continue reading
Flashing STOP button in Sony VTRs
If (on a DigiBeta DVW-A500 or similar) you enable menu item 105 – Ref Alarm – the stop lamp will flash under several conditions: The reference signal is solid and the input video is locked but there is more than … Continue reading
