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RF level PVW2800 & tape alignment

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dolps fernando
RF level PVW2800 & tape alignment
on Jul 31, 2009 at 8:02:54 am

Hi guys,

Just want to ask what's the importance of the RF level and how to read it in a PVW2800 deck. We've been viewing our waveform/vectorscope when we dub but I noticed that we're not paying that much attention on the RF level meter. I think we're doing something really wrong this couple of years. just need some enlightenment. And another thing, what are the signs that there's a misalignment with our deck and do you know a reference on how to fix it? Thanks guys!

Cheers!


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maurice jansen
Re: RF level PVW2800 & tape alignment
on Aug 3, 2009 at 9:26:41 pm

well it measure the signal coming off the tape through the head's.
so in practice the meter is saying something about the condition of your tape or the condition of your deck. it's a good practise to watch it sometime's. you don't have to gaze at it all the time. when trouble arises it can help you determine where the trouble is. it can even reveal bad REC head's or circuit's from other deck's !! there are if your deck is at a good condition this moment record yourself a referencetape you can use it later to determine tape or PBcircuit/head problem's.

greet
Maurice



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Bob Zelin
Re: RF level PVW2800 & tape alignment
on Aug 3, 2009 at 10:10:54 pm

Hi Maurice,
you mean that you can't teach me how to repair and calibrate a PVW2800 on an internet forum ! What is wrong with you ?

;)

bob Zelin




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maurice jansen
Re: RF level PVW2800 & tape alignment
on Aug 4, 2009 at 6:43:15 am

lol ;-)

ok let's say t in other words
look at the meter reguraly wrong readings call your betacam doctor

greet
Maurice


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Tom Matthies
Re: RF level PVW2800 & tape alignment
on Aug 5, 2009 at 3:14:42 am

Low RF can cause excessive dropouts to become visible. It can cause a noisy, grainy looking picture. Lines moving horizontally thru the picture. tearing at the top or bottom of the picture especially when the tape path is misaligned. It's easy to see low RF. It can be very difficult to find just what the cause is. To properly align a machine takes specialized tapes, jigs and tools and a lot of know how. The best thing to do in a PVW-2800 is to look at the tracking meter and turn the adjacent knob to maximize the deflection of the meter to the right. It should be solid and steady-no wavering. Basically, you are looking at the RF level in a simplified way.
The 2800 is usually a pretty solid machine. If the meter is showing good tracking and you don't see any tearing or flagging at the top or bottom, you're most likey good to go. If it varies too much, you see tearing or noise in the picture, you might want to contact a qualified repair site.
It's also possible to get excess RF off of the tape. This will usually indicate badly worn heads. It sometimes can be seen as short, black horizontal streaking going to the right of certain highlights or areas of very fine detail. You'll know it if you see it. It's ugly.
Tom

Life moves pretty fast. If you don't stop and look around once in a while, you could miss it.--Ferris Bueller


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dolps fernando
Re: RF level PVW2800 & tape alignment
on Aug 5, 2009 at 9:10:09 am

Thanks for a great info Tom.
Cheers!!!


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