Search found 490 matches

by PID_Stop
Tue Jan 16, 2018 1:33 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 3
Views: 40

Re: BVH2500_BVT2000 Interface_Performance

Okay, here's an update after taking a look at the remains of our old 2500... 1) The switch I was thinking about to get rid of the sparkles is called "R/P MODE", and is to the left of the fluorescent readout on the control panel. The setting to try is the bottom "CONFI HEAD", which is the equivalent ...
by PID_Stop
Tue Jan 16, 2018 1:09 pm
Forum: Ask the Engineers
Topic: BVH2500_BVT2000 Interface_Performance
Replies: 3
Views: 40

Re: BVH2500_BVT2000 Interface_Performance

Greg, That kind of sparkle is commonly caused by bad sliprings or brushes. On a BVH-2000/2500, power for the preamp mounted to the inside of the upper drum, plus control signals to the dynamic tracking actuators, goes through these brushes. Try changing from the "PLAY" head to the "R/P" head -- the ...
by PID_Stop
Tue Nov 21, 2017 3:31 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 259

Re: BVH-2000 guide retraction

It was striking to see how different facilities were "Ampex stations" or "Sony stations". We went from Ampex quad machines to Sony one-inch; the other stations in town were all Ampex. I wound up getting a fair amount of freelance repair work in Rochester -- for some reason, while TV stations, which ...
by PID_Stop
Tue Nov 21, 2017 12:18 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 259

Re: BVH-2000 guide retraction

What you're after, Sony calls the threading motor, and there are no belts involved: it's a gearmotor assembly that slowly spins a metal wheel with an offset pin that pulls the guide linkage out and pushes it back... Why the heck didn't Panasonic think of that? Replacing the threading drive belt in ...
by PID_Stop
Mon Nov 20, 2017 1:54 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 259

Re: BVH-2000 guide retraction

For inquiring minds, here are the different test modes you can get by setting rotary switches on the CD-17 board and pressing the button under the bottom rotary switch: 2 - 0 - 0: Supply reel torque check (must have a new one-hour reel on the supply reel) 3 - 0 - 0: Takeup reel torque check (must ha...
by PID_Stop
Mon Nov 20, 2017 1:40 pm
Forum: Ask the Engineers
Topic: BVH-2000 guide retraction
Replies: 7
Views: 259

Re: BVH-2000 guide retraction

What you're after, Sony calls the threading motor, and there are no belts involved: it's a gearmotor assembly that slowly spins a metal wheel with an offset pin that pulls the guide linkage out and pushes it back. If memory serves, the wheel also has a magnet attached to trip reed switches to tell t...
by PID_Stop
Mon Nov 13, 2017 12:36 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 10
Views: 512

Re: Convert to LEDs, or leave 110v?

Or if you have some other reason for wanting to eliminate the 110VAC component entirely (the noise of the relay, for instance), NAPA sells 12v LED truck marker lights in a variety of sizes and shapes, most of which are around $10-20. They're bright, easily mounted, and you don't need to mess with re...
by PID_Stop
Tue Oct 24, 2017 7:45 am
Forum: Everything else
Topic: Weatherized cable/antenna identification tags
Replies: 6
Views: 478

Re: Weatherized cable/antenna identification tags

A similar solution would be brass valve number tags, which are a stock item, and are inexpensive. A plumbing supply house should have them, as does Grainger.

Jeff
by PID_Stop
Thu Oct 19, 2017 3:03 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 630

Re: More Bad Sports Audio on Fox

...it is a disservice to put out a product where most listeners can't understand Joe because of a bad mix. No disagreement there. I'm simply observing that it's not a trivial exercise to make a mix that sounds good in mono and in stereo and in 5.1, especially in a sub-par environment like a truck.
by PID_Stop
Thu Oct 19, 2017 12:11 pm
Forum: TV Engineering
Topic: More Bad Sports Audio on Fox
Replies: 9
Views: 630

Re: More Bad Sports Audio on Fox

Another factor in play is the number of ways people listen to the audio -- everything from small monaural sets to stereo to large 5.1 surround setups. A reasonable 5.1 mix with lots of crowd ambience might not downmix well to stereo, or to mono. Moreover, you have the vagaries of how stations map au...
by PID_Stop
Tue Oct 17, 2017 3:23 pm
Forum: Ask the Engineers
Topic: Wanna Play "Guess What's in the Grey Box?"
Replies: 16
Views: 1032

Re: Wanna Play "Guess What's in the Grey Box?"

"Clean Box Pro"? Not quite...

Jeff
by PID_Stop
Wed Sep 20, 2017 2:12 pm
Forum: Ask the Engineers
Topic: Engineers SOS
Replies: 9
Views: 581

Re: Engineers SOS

We certainly don't do it for the money! I suspect most of us are drawn toward big equipment with high voltages that could end our afternoon with a noisy, smelly flash... rather like a jumbo bug zapper.

Or maybe it's because we get to watch TV or listen to the radio all day.

:lol:

Jeff
by PID_Stop
Mon Sep 11, 2017 10:35 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 541

Re: JPEG2000 Adaptive Bitrate live streaming

For television stations in the United States, the most obvious use case is ATSC program encoding, which is MPEG2 with AC3 audio. We happen to use Harmonic Electra 9200 encoders, which incorporate several encoders with statistical multiplexing. We also stream MPEG4 over IP between our hub and spoke s...
by PID_Stop
Wed Sep 06, 2017 8:51 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 541

Re: JPEG2000 Adaptive Bitrate live streaming

Hi Michal, Within our facilities, we work with uncompressed video -- HDSDI. The only reason we do encoding of various sorts (MPEG2, MPEG4, JPEG2000) is to get the bitrate down to a rate that is reasonable to record or transmit over an RF or IP link. Recording equipmnent typically has its own CODECs ...
by PID_Stop
Thu Aug 24, 2017 9:11 am
Forum: Ask the Engineers
Topic: JPEG2000 Adaptive Bitrate live streaming
Replies: 6
Views: 541

Re: JPEG2000 Adaptive Bitrate live streaming

We used a JPEG2000 link a number of years ago to move an HD program feed from our regional control center in one city to one of our stations in another city... it was a Leitch 6800+ series card set, which tells you how long ago this was. The system had almost no delay, on the order of several frames...