Magic DaVE: Difference between revisions

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{{HDNO}}
{{Equipment}}
Magic DaVE's are powerful full 3d Digital Video Effects mixers. We use them to switch between different things during a show - like mixing into a VT. Sometime, you may ask what the magic button does, these machines do actually have magic buttons. They do nothing useful - just for configuring menus... which dont really need configuring for what we use them for.


==Magic DaVE==
The station's main vision mixer, the front end control panel has been featured on air a number of times thanks to it's enamelled metal good looks and general air of sophistication.
* Mark 1 Mainframe, Option card slot non-functional (fault on PCB, doesn't affect performance for us)
* Compact Control panel (no direct access to keyers & Key bus) Software Version 3.0.
=="F" Magic Dave (Bob)==
* The same as DaVE, with a few differences.
* Mark 2 mainframe, Fully functional after re-capping in 2011
* Compact panel with v4.00 (last software) provided by Snell & Wilcox.
* Frame speed is 32Mhz
* Panels cross compatible with DaVE
* incredibly useful for aspect conversion work, such as putting howard into the path, or converting image formats.


==Connection==
Thanks to [[Matt Hammond]]'s connections with Snell and Wilcox (his Dad worked for them!), YSTV acquired it's 4-input analogue Magic DaVE Vision mixer for much less than it should have cost (hence why we could afford it!). This wasn't some dodgy back room deal, however. The unit we have is an early Mark I back end, which has a subtle fault on the PCBs rendering the expansion slot unusable. This lead to it's return under warranty from the Middle Eastern broadcaster who had bought it when they acquired an expansion card. This left Snell wondering what to do with a perfectly good digital frame store vision mixer, which wasn't really saleable because it didn't meet the spec. It eventually found it's way to YSTV, and has been in active use ever since, although not many people have ever mastered the full range of special effects and sequences it can be programmed to produce.
* 4 inputs, all analogue, each with the following options per input:
** Composite on BNC
** YPbPr on 3xBNC
** Y/C on Svid


* Key video input
Often referred to simply as "Dave", which often caused confusion (and [[quotes board]] material) when [[Dave Baker]] joined.
** Composite on BNC
** For inputting a Matte / cut area
 
* Preview output
** YPbPr / RGB on shared BNC's (3xBNC total)
** Settable via service menu
 
* Program outputs
** YPbPr on BNC (1 of) (3xBNC per set)
** Composite on BNC (2 of)
** Y/C on Svid (2 of)
 
* Snell & Wilcox Rollcall
 
* Ref in & loop
** For locking DaVE's output onto an unsyncronised source, or another mixer
 
* Black Burst (4 of)
** For sending a signal for other devices to lock onto
 
* GPI port
** input & output configurable
** default setting:
*** Active Low tally - a null output signals the source is visible (or partially) on the program buss.
 
==Using DaVE==
DaVE is a Program/Preset mixer: this means, whatever is on the Program bus is ALWAYS what's going out. The Preset bus is what will go out if you fade across to it using the T-Bar. If you put one thing (call it 'A') on the program bus, and 'B' on the preset bus, and fade between them, at the end of the fade, DaVE will swap them over to make them the right way round again ('B' on the program, and 'A' on the preset). So, watch out! the T-Bar does not indicate which bus is live!
 
You can switch between items instantly, by just pressing a different source on the Program bus. DaVE can also do the transitions for you, use the 'take' button.
 
DaVE's panel allows you to change the transition type, (wipes, dissolves, pixelation, PiP...), the colour of the transition, it's size, position, angle, axis...
DaVE also has a Huge pile of effects it can apply to the output - the list is almost endless, and again, you can change almost every aspect of them.
'''Warning''' Attempting to master all of DaVE's quirks and abilities is impossible, don't try it! Also, most of the effects are incredibly cheesey.
 
===Shots===
DaVE(s) can save settings in them. To do this, set up a shot as you want, like a PiP or a DVE thing. Then navigate to the next available sequence space, and click Save Shot. You can then use these settings on whatever is currently on the Progam and preview busees - i.e. it doesn't have to be the channel numbers you used when you saved the shot. To use the shot, hit "recall shot". DaVE will then Morph it's way to the saved settings, and increment the next shot counter (so if you press recall again, it will do the next saved shot....)
 
==Control cable==
[[File:Dave_cable.png]]
 
OR, using Sneel & wilcox rollcall: Connect a Buss network using T peices on ALL devices from 75ohm coax, connect in a chain, and on the end devices, add a 75ohm terminator. Do NOT have a network running with the chain end running straight into a device!
[[Category:Technical]]
[[Category:Vision Path]]
[[Category:Equipment]]

Revision as of 17:48, 7 August 2019

This article is about a piece of equipment. For more information on what it is for or how to use it, try its documents wiki article.

The station's main vision mixer, the front end control panel has been featured on air a number of times thanks to it's enamelled metal good looks and general air of sophistication.

Thanks to Matt Hammond's connections with Snell and Wilcox (his Dad worked for them!), YSTV acquired it's 4-input analogue Magic DaVE Vision mixer for much less than it should have cost (hence why we could afford it!). This wasn't some dodgy back room deal, however. The unit we have is an early Mark I back end, which has a subtle fault on the PCBs rendering the expansion slot unusable. This lead to it's return under warranty from the Middle Eastern broadcaster who had bought it when they acquired an expansion card. This left Snell wondering what to do with a perfectly good digital frame store vision mixer, which wasn't really saleable because it didn't meet the spec. It eventually found it's way to YSTV, and has been in active use ever since, although not many people have ever mastered the full range of special effects and sequences it can be programmed to produce.

Often referred to simply as "Dave", which often caused confusion (and quotes board material) when Dave Baker joined.

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