The DRX-500 and DRX-600 instruments are
nearly identical in their capabilities.
There are a few differences: the DRX-600 has a preemphasis unit,
so you can use
the "setpre" command to disable the gradient amplifier modules in order
to balance
the gradient current to zero. On the DRX-500 the gradient
amplifiers must be
disabled manually, by pushing in and holding the "reset" buttons.
The DRX-500 has
DQD capability (removes quadrature artifacts in one scan per increment
2D
experiments). The available
probes are different as
well. Late in 2003 we will
be upgrading the DRX-600 to include
2H decoupling,
2H
gradient shimming,
and the latest software.