.uk dhole23
Date: Fri Jun 6, 2008 6:28 am ((PDT))
Carter
I wouldnt recommend having the trim and gain up full. This setup is past
the optimum for the circuits, and will introduce noise. The trim levels
should be set for best signal to noise ratio and it dosent sound like
you are doing that. I think you are expecting too much from such a cheap
device.
David Briggs
Carter Scholz wrote:
>
>
> Hi,
>
> I recently bought a Fostex FR-2LE and I've been making some test
> recordings with it. I've noticed a steady tone that shows up only
> when phantom power is turned on. When sampling at 96/24, the tone is
> on both channels at about 30,700 Hz; with trim and gain up full,
> using AT 3032s, it is about -66 dB (L channel) and -72dB (R
> channel). If the internal mics are used, with phantom on, the tone
> is there, but at a lower level. When sampling at 44/16, the tone is
> somewhere around 16 kHz, about the same levels. If phantom is turned
> off, and internal mics used, there is no such noise at any sample rate.
>
> I assume this is electrical noise from the switching circuit used to
> generate the P48. Has anyone else observed it? Is this typical of
> the Fostex, or do I have a bad unit? And why would it change
> frequency depending on the sample rate?
>
> It's a small amount of noise, but if you shift the 96/24 file down
> three octaves, it is definitely audible.
>
> Carter Scholz
>
>
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