Re: Panasonic WJ-MX12 (adding sources?)

"Alan S." <usenet@xxxxxxxxxxxxxxxxx> wrote in
news:Xns9C756299E3131usenetnojunkaspal@xxxxxxxxxxxxxxx:

"David McCall" <mccallmail@xxxxxxxxxxx> wrote in
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"Argo22" <markrc@xxxxxxxxx> wrote in message
news:d1c60a2b-74d8-4b95-80f3-d0bbf4138ca0
@s13g2000yql.googlegroups.com.
..

Apparently the WJ-MX12 has a frame synchronizer and not a TBC as
some mixers do like the Videonics MX-1 and MX-Pro. I have 2
cameras that are random unlocked and using the internal sync
from the mixer. I have a passive ("bang box" some have referred
to) switcher from radio shack that i tried and that produces the
glitch over all sources. I have acquired a panasonic WJ-220 from
a friend and will try that. He think it will since the source is
switched using vertical interval and should not glitch.

Thanks
Mark

I think you may find that they all have built-in frame syncs.
AFAIK a TBC is only capable of doing limited time base error
correction for sources that are already synced together. Early
TBCs could only do a few lines, while some of the later units
could handle a full field at a time. For the last couple decades,
most of these devices have been full frame syncs and are capable
of handling a free wheeling video input and lock it to a
reference sync signal. The only TBCs I've seen for quite a while
have been built right into video tape recorders and players.

I have not used many of the Panasonic prosumer level switchers.
The units of this type that I have used that have multiple inputs
will glitch if you switch
the input of the input that is being used as a reference. If you
switch to the
channel that is being used as a reference, then you can select a
new device on the other input and then switch or dissolve through
to that new input. However, you can't make another input
selection until you switch back to the referenced input before
making the new selection.

David





I had an MX12 a (long) time ago so this is from very vague memory.
Have you tried swappinng the inputs over? Some of the MX range use
one of the inputs as a sync reference, running free when there is
no input. If your bang box was plugged to the channel used as a
reference then the o/p would glitch when turned on. Try using a
_solid_ source i.e a camera in the reference input.

I'm sorry if I'm barking up the wrong tree, I moved up the MX
range and may be thinking of a later model.

Alan S.

Your memory is pretty good Alan. The MX-12 and the MX-10 that
preceeded it use the video 2 input as reference.

David, connect your switchbox to the video1 input.


--
Bob Quintal

PA is y I've altered my email address.
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