Reply to Re: turn off AGC

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Posted by Pat Horridge on 04/05/06 11:11

I stand corrected then. Just relaying a memory of studying a P150 circuit
diagram when we first got our first PD150.
But there have been a lot of circuit diagrams since then and before then so
hands up to being wrong.

<mv@movingvision.co.uk> wrote in message
news:gNzBY6FXWpMEFwfF@movingvision.demon.co.uk...
>
> This is getting silly. Why do those who clearly have little or no
> expertise in these particular cameras insist on arguing with me even after
> I've declared a long standing broadcast and professional usage of 'em???
>
> No Pat, they are not unconditionally limited. They provide both manual and
> automatic modes for every conceivable audio function, separately or
> linked, as required, for each channel. In full manual mode one can exceed
> 0db and irretrievably distort the recording in error. This is not
> speculation.
>
> In message <E0u0sm$rup$1$8300dec7@news.demon.co.uk>, Pat Horridge
> <pat@remove-spam.vet.co.uk> writes
>>I thought all those cameras (certainly the PD150 and I think the 170) have
>>limiters even if you switch to manual mode.
>>I seem to remember seeing it on circuit diagram somewhere.
>>So even if AGC is off if you give it too much it will limit.
>>If this limit is set to be just before the digital clip point it's not an
>>issue.
>>
>><mv@movingvision.co.uk> wrote in message
>>news:r1EDmPNLQTMEFw8g@movingvision.demon.co.uk...
>>> >
>>>>Suppose one were to raise the gain of Just One Channel (e.g. the right
>>>>channel of a stereo input) - would that force the ALC (I'm unclear on
>>>>the
>>>>diff. from AGC) to be a constant?
>>>>
>>>
>>>
>>> If you're referring to the PD150, PD170, Z1, A1 and the like, they have
>>> separate control options for each channel. They have all the audio set
>>> up
>>> and control tricks found on broadcast cameras. We've been using all of
>>> the
>>> above types and most broadcast types in every mode from the first
>>> availability of each model, so I can be definitive, as opposed to
>>> speculative.
>>> --
>>> John Lubran
>>
>>
>
> --
> John Lubran

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