Search found 567 matches

by PID_Stop
Thu Sep 13, 2018 12:04 pm
Forum: TV Studio Engineering
Topic: Genlock
Replies: 4
Views: 312

Re: Genlock

We generally think of genlock as a means of keeping sources in phase, since that's necessary for clean transitions. It's easy to forget that in order to enforce a phase relationship, you're more fundamentally forcing each source's internal oscillator to run at exactly the same frequency. That become...
by PID_Stop
Mon Sep 10, 2018 2:23 pm
Forum: Ask the Engineers
Topic: Sony BVH 2000 PS. Gray screen, with color flicker
Replies: 3
Views: 136

Re: Sony BVH 2000 PS. Gray screen, with color flicker

I am less familiar with the PAL version than with the American NTSC version, but the color flicker problem sounds like you are looking at video that is not time-base corrected. Also, if you are using a time-base corrector, make sure your monitor is getting the "TBC" and not the "demod" output. Final...
by PID_Stop
Wed Sep 05, 2018 7:57 am
Forum: Ask the Engineers
Topic: BVH-2000 playback muting to grey screen
Replies: 4
Views: 254

Re: BVH-2000 playback muting to grey screen

Bear in mind that the interface to the external BVT (via the round multi-pin connector) doesn't necessarily use the exact same handshaking circuits that the internal BKH timebase corrector uses... so there are credible cases where the fault could still be in the SV-43 board. One thing that could tel...
by PID_Stop
Tue Sep 04, 2018 9:00 am
Forum: Ask the Engineers
Topic: BVH-2000 playback muting to grey screen
Replies: 4
Views: 254

Re: BVH-2000 playback muting to grey screen

The SV-43 card is common to both NTSC and PAL/SECAM models; it is the gateway between the main system controllers (SY-79 and SY-80), and the analog servos for the reels, capstan, and drum. When you hit the PLAY button, the machine goes through several modes before it gets to the point of being compl...
by PID_Stop
Thu Aug 30, 2018 7:22 am
Forum: Ask the Engineers
Topic: Tantalum caps
Replies: 9
Views: 283

Re: Tantalum caps

Sounds like our old Panasonic DVC Pro cameras... Ugh... DVC-Pro. Our original centralcasting facility used several dozen DVC-Pro decks, twelve of them in a spawn-of-Satan robotic contraption called a TiltRac. We ended up buying an entire reel of surface mount capacitors from Digikey after the first...
by PID_Stop
Wed Aug 29, 2018 7:02 am
Forum: Ask the Engineers
Topic: Tantalum caps
Replies: 9
Views: 283

Re: Tantalum caps

Several decades ago [edit: about 40 years ago!] , the local NBC affiliate bought a package deal from Central Dynamics that included a large production switcher and a fairly large routing switcher (the video crosspoint frames took up a whole rack, as I recall). The production switcher was fine, but t...
by PID_Stop
Tue Aug 28, 2018 2:57 pm
Forum: TV Engineering
Topic: Ericsson 8200
Replies: 4
Views: 274

Re: Ericsson 8200

BTW I was at your tower last week getting some nice weather updated pictures of it. I saw a van there but didn't want to bother who was inside. Hmmmm... I wonder who that would have been? Of our two people who normally work there, neither drives a van. Maybe it was a tech working on some of the LMR...
by PID_Stop
Tue Aug 28, 2018 10:34 am
Forum: TV Engineering
Topic: Ericsson 8200
Replies: 4
Views: 274

Re: Ericsson 8200

According to the manual, pressing the right arrow button during powerup loads the secondary flash code. As far as I know, the best way to unlock the front panel is through the web interface, advanced page, "Device Info" tab.

Jeff
by PID_Stop
Tue Aug 28, 2018 7:58 am
Forum: Ask the Engineers
Topic: Tantalum caps
Replies: 9
Views: 283

Re: Tantalum caps

In some cases, tantalum caps are a better choice for stabilizing circuits that tend toward high frequency self-oscillation -- 7800-series regulators come immediately to mind. They are fairly unforgiving of overvoltage conditions, so if space allows, you might want to replace a 35-volt cap with one r...
by PID_Stop
Thu Aug 23, 2018 9:37 am
Forum: TV Engineering
Topic: High School Studio patchbay - help!
Replies: 11
Views: 351

Re: High School Studio patchbay - help!

We originally installed the Gefen USB 2.0 LR extenders as part of the WSI system (back when the rack was in the studio), and they work quite well. You only need one set per computer: the computer end plugs into a single USB port, and the remote end has two USB jacks that will accommodate both keyboa...
by PID_Stop
Thu Aug 23, 2018 7:53 am
Forum: Ask the Engineers
Topic: Telco lightning/surge arrestors
Replies: 4
Views: 273

Re: Telco lightning/surge arrestors

You might also look at Transtector; we've used their products for both POTS lines and Ethernet runs (e.g., WiMax runs up the tower).

Jeff
by PID_Stop
Thu Aug 23, 2018 7:12 am
Forum: TV Engineering
Topic: High School Studio patchbay - help!
Replies: 11
Views: 351

Re: High School Studio patchbay - help!

A forward looking option would be to deploy coax / connectors suitable for SDI and use HDMI over COAX boxes at both ends. https://www.blackbox.com/en-us/store/Detail.aspx/HDMI-to-3G-SDI-HD-SDI-Converter/VSC-HDMI-SDI https://www.blackbox.com/en-us/store/Detail.aspx/3G-SDI-HD-SDI-to-HDMI-Converter/VS...
by PID_Stop
Thu Aug 23, 2018 6:58 am
Forum: TV Engineering
Topic: High School Studio patchbay - help!
Replies: 11
Views: 351

Re: High School Studio patchbay - help!

One issue nobody has addressed is cable length -- and for digital signals, that can be a show stopper. Generally speaking, 50 feet is about the maximum reliable distance for an HDMI line, and this makes the assumption that the cable is in new condition (not deformed or kinked, connectors in good sha...
by PID_Stop
Thu Aug 16, 2018 9:07 am
Forum: Ask the Engineers
Topic: Video feed problem
Replies: 2
Views: 186

Re: Video feed problem

I'm replying to your PM back in the forum thread, because then other people who visit with similar questions can see the answer too. From what I understand, your question really boils down to understanding what the different components actually do, and how they fit into a complete production / broad...
by PID_Stop
Mon Aug 13, 2018 3:30 pm
Forum: Ask the Engineers
Topic: Video feed problem
Replies: 2
Views: 186

Re: Video feed problem

Can you give a bit more detail about what you're trying to do? It sounds like you are wanting to feed video into a projector... so it would be a matter of getting appropriate interconnection from the switcher into the projector. Knowing specifically about the switcher and projector would be helpful ...