TBC/DNR on my JVC HR-S7600U

[ministry88]

OK. I just got my HR-S7600U in and it's GREAT. Great build quality and tons o' options. BUT, I've got one concern: I see the TBC is connected to the Digital Noise reduction feature. The Noise Reduction feature is INVALUABLE -- I see chroma noise vanish before my eyes and it's a godsend. BUT, sometimes when I have the TBC/DNR on, it causes some of my tapes to jitter. This is remedied by turning off the TBC/DNR (at the expense, of course, of the noise reduction).

My concern is: will tapes jitter in some places, like for only a few minutes, or do they jitter throughout? I'm asking because I don't want to babysit every transfer (that is, watch EVERY transfer) to make sure there is no jitter if I have the TBC/DNR on. So far, I've noticed the jitter seems to be throughout (that is, at any random place I choose to check) so my method is to check a few random places on the tape to see if there is jitter and if there is, I turn the TBC/DNR off. And if there isn't, I keep it on.

Is this all I need to do to make sure there is no jitter? Basically, my worst fear is years later once my VHS to DVD-R archiving is long done, I'll put in a DVD-R and it will be jittering all over the place because I didn't check the tape ALL THE WAY THROUGH for jitter.

[lordsmurf]

The tape is to blame here. You'll need to keep TBC off, and then use a chroma-removing DVD recorder, such as the older JVC or LiteOn series machines.

Panasonic VCRs are the same way.

If the tape is going to do it, it's going to do it.

[ministry88]

Hmm, so you do you recommend keeping the TBC off FOR ALL TAPES to be extra safe or just for the problem ones where I happen to find the jitter?

Seems pointless to always disable the TBC and noise reduction, as that's a main feature of the VCR. BUT, I do have a Pioneer 340h DVD Recorder that has something called "3D Noise Reduction" and "3D Y/C Separation Circuit" as well as "YNR" and "CNR."

From the Pioneer manual:

"YNR": Adjusts the amount of noise reduction (NR) applied to the Y (brightness) component."
"CNR": Adjusts the amount of noise reduction (NR) applied to the C (color) component."

[lordsmurf]

It is an unfortunate situation for you, but your tapes must've been recorded in a way that is not quite stable. I've seen this before, with another persons. It's not common, but happens.

Personally, I would monitor the tapes more carefully. If you don't have that kind of time, then turning off TBC is next solution.