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Old September 25th, 2003, 08:41 PM   #1
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Persistent signal *drop-outs*

OK, my experience with both GR-HD1 and JY-HD10, similar statistics:

- intermittent signal dropouts about once in 5 to 10 minutes of the taping.

I'm recording in HD mode, 1280x720, 30p.

Shaking the camera immediately leads to a drop-out, but under normal conditions - walking, tripod-mounted, hand-held in car - the drop-outs still occur intermittently as described above.

This is very strange as my Sony VX2000 simply never had a signal drop-out.

I tried 2 JVC-brand tapes (M-DV60ME and M-DV60PRO) and Sony Excellence (DVM60EXL).

Although supposedly the gear must be optimized for the *same brand* tapes... JVS tapes were statistically the worst, while Sony worked best - but still exhibited slight drop-outs (sudden blocky lines/areas of the image, lasting approx. 0.5 seconds).

Both cameras were brand new.

Is it a weak transport issue? Too high a data rate for the "normal" miniDV tapes? Something else?

Please describe your experience with these cams and drop-outs.

Thanks!
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Old September 25th, 2003, 10:11 PM   #2
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Well it's certainly worth investigating. I experienced no such thing on the HD10 I worked with...
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Old September 25th, 2003, 10:16 PM   #3
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I saw a drop out during some testing, but we rewound the tape and tried to find it again and was not able. We took this as a momentary head clog.

I would try the head cleaner that came with the camera, and see if it happens again.

Hope thishelps

DBK
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Old September 26th, 2003, 12:13 AM   #4
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I have had that same problem when shooting with a Sony PD150. I just cleaned the heads in the camera and the problem solved. Good Luck.

Matt
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Old September 26th, 2003, 03:42 PM   #5
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Matthew, your PD150 was brand new at the time?

Is it feasible that on 2 of my cameras, brand new heads already need abrasive cleaning?

Please advise.
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Old September 26th, 2003, 04:04 PM   #6
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It's a MiniDV transport and tape.

So look at the usual suspects.

I had no problem with Sony DVCAM tape.
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Old September 26th, 2003, 04:25 PM   #7
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Steve, which tape do you use?

On the web, I found Sony mini DVCAM PDVM-40 (or 32, number indicates length of run in minutes.)

Is this what you use with no drop-outs?
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Old September 26th, 2003, 04:32 PM   #8
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Just clean the heads. You don't need to buy expensive tape.

Sony, Fuji, JVC tape it will be fine.

DBK
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Old September 26th, 2003, 07:34 PM   #9
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Interesting

I don't think I have run my camera for single shots longer than a few minutes. I will try it and report back.

Mike
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Old September 27th, 2003, 12:13 AM   #10
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In playing back 240 minutes of material ( 4 tapes ) for our short, I have seen only one dropout. It also was not repeatable and was probably a fleck of oxide on a head.

I'm using TDK consumer tape. We also shook the camera and did a lot of frantic handheld work, no problems.

And the bit rate is actually lower than DV, not higher.

Jay
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Old September 28th, 2003, 01:28 PM   #11
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Thank you all for your persistent suggestions to clean the cam's heads.

I was *wrongly* under impression that this should be no issue with a brand new camera.

Again, wrong!

Ran a cleaning tape for 10 seconds. And now...

Drop-outs? What drop-outs?

Of course, I will need more tests, but already a 30-minute run without a single problem. Before cleaning, I'd have at least 3 drop-outs in that time.

Many thanks to all who was persistant in suggesting that I simply used a head cleaner. Too bad they don't make one for human heads, I probably need it! :)
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