[QuadList] Sunday Trivia Questions--Why is there a 15-line mode on some WFM monitors, and how is it used?--

[Ted Langdell]

Jeff is our first correct respondent, followed by Chris Hill, Dennis Degan and Ian McKenzie.

So NTSC and PAL are represented from NYC, Detroit, the UK and Australia.

The reply timing must have something to do with time zones, as they appear to have swept across the globe in sequence.

If anyone's response didn't make the list, please forward your original reply to me off-list.

Feel free to post your own questions, trivia or not. 

Ted

Ted Langdell
Secretary
Quad Videotape Group
e-mail:	ted at quadvideotapegroup.com

On Jul 13, 2014, at 3:00 PM, Jeff Booth via QuadList wrote:

> 
> 
> From: "Jeff Booth" <jeff.booth at ntlworld.com>
> Date: July 13, 2014 1:13:25 PM PDT
> To: "'Ted Langdell'" <ted at quadvideotapegroup.com>, "'Quad List'" <quadlist at quadvideotapegroup.com>
> Subject: RE: [QuadList] Sunday Trivia Questions--Why is there a 15-line mode on	some WFM monitors, and how is it used?--
> 
> 
> Each video head records/plays 15 lines. The 15 line display (from my very distant memory) it was best used on demod out to check timebase stability, jitter, sync pulse shape and eq. Also chroma phasing/diff phase and diff gain (head by head) – although this was on colourtec out, prior to station syncs being reinserted to the video.
>  
> Do I win the prize?
>  
> Jeff
> UK, ex BBC VT
>  
> From: QuadList [mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Ted Langdell via QuadList
> Sent: 13 July 2014 19:19
> To: Quad List
> Cc: Ted Langdell
> Subject: [QuadList] Sunday Trivia Questions--Why is there a 15-line mode on some WFM monitors, and how is it used?--
>  
>  
> 
> 
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