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Posted by Martin Heffels on 07/17/07 15:09
On Tue, 17 Jul 2007 07:19:20 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:
>On a sunny day (Tue, 17 Jul 2007 00:01:44 +0200) it happened Martin Heffels
><goofies@flikken.net> wrote in <2iqn935urjksoqchqiglg7n8opvas9qd9l@4ax.com>:
>
>>On Mon, 16 Jul 2007 19:13:15 GMT, Jan Panteltje
>><pNaonStpealmtje@yahoo.com> wrote:
>>
>>>When the tape moves faster, and the minimum bit distance is the same,
>>>then you get a higher data rate (bits per second), so better quality,
>>>FOR THE SAME RELIABILITY.
>>
>>Wrong conclusion: you get a higher reliabilty,
>
>Oh no, the 'reliability' is set by how close the magnetisation areas
>are together.
>Noise being the culprit, if too close.
Sorry, but in relation to DV25 (what we were talking about), this is
wrong. The datarate stays the same, no matter if you run the tape at
Standard Play or Long Play. Because the bits are written closer
together in Long Play, then if there is a drop-out in the tape, the
amount of damage is much bigger. You won't get a noisier signal at
Long Play in DV25.
>>but the quality is
>>still the same.
>
>The quality is set by how _fast_ you can read (and write) those pulses.
>And that sets the bitrate.
That is of course very true, but in DV25 you can not control this.
cheers
-martin-
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