HDX900 continues

Hello,
again with my syncing stories with the HDX900.
-i do not have internet acces where we are shooting-

We found out the reason for the major shift (few seconds!):
the dop is changing the user bit for each new tape (date and tape number).
there is a subtle manipulation trick:
1- switch from TC to USERBIT
2- switch from FREE-RUN to SET
3- do the changing of user bit
4- switch back from SET to FREE-RUN
5- THEN switch back fom USERBIT to TC

If by mistake you do 5 before 4 then the generator gets confused and you
can get few seconds drift !!
In the heat of the shoot that can happen, espescially if you don't know
about it.

Something else: the few frames delay that was mentionned previously (due
to camera hd processing before recording) is also happening to me in
REC-RUN !!! We did try the rec-run TC from camera to 744T ext tc-auto rec
setting. It is highly surprising but there is 4 frames and a half delay !!
(2 in free run...)
THere is a probability that something is wrong with our Final cut pro, as
none of us is editor, and we do the transfer and sync on location.

A last trick with the HDX900: the 12v DC out hirose plug is using pin 2
and 3 for remote triggering of record and a tally. So if you use the vdb
cable for audio limited receiver powering , beware that these pins are not
linked to either 1 or 4 !!

Fred

On Mar 28, 5:25 am, fredoutofmars.antis....RemoveThis@yahoo.fr (Fred Salles)
wrote:
> Hello,
> again with my syncing stories with the HDX900.
> -i do not have internet acces where we are shooting-
>
> We found out the reason for the major shift (few seconds!):
> the dop is changing the user bit for each new tape (date and tape number).
> there is a subtle manipulation trick:
> 1- switch from TC to USERBIT
> 2- switch from FREE-RUN to SET
> 3- do the changing of user bit
> 4- switch back from SET to FREE-RUN
> 5- THEN switch back fom USERBIT to TC
>
> If by mistake you do 5 before 4 then the generator gets confused and you
> can get few seconds drift !!
> In the heat of the shoot that can happen, espescially if you don't know
> about it.
>
> Something else: the few frames delay that was mentionned previously (due
> to camera hd processing before recording) is also happening to me in
> REC-RUN !!! We did try the rec-run TC from camera to 744T ext tc-auto rec
> setting. It is highly surprising but there is 4 frames and a half delay !!
> (2 in free run...)
> THere is a probability that something is wrong with our Final cut pro, as
> none of us is editor, and we do the transfer and sync on location.
>
> A last trick with the HDX900: the 12v DC out hirose plug is using pin 2
> and 3 for remote triggering of record and a tally. So if you use the vdb
> cable for audio limited receiver powering , beware that these pins are not
> linked to either 1 or 4 !!
>
> Fred



The 4 frame delay is not avoidable w/ current Panasonic equipment. It
is due to latency caused by the picture pre-processing done by the
camera before laying the data to tape.

Philip Perkins