There are a bunch of very full topics about this recorder, beginning in 2005.
The conclusion is that the pre-amps, meters, input, STN, internal battery, and just about everything else on it are useless.
The unit is worthless for field use on its own.
However, the unit is very handy if you're using it as a 24/48 bit bucket, with a high end pre-amp feeding it through the coaxial input.