Nx242 Versus Nx241: What's New; What's Remain The Same; What's Changed - Nexo NX242 Manuel D'utilisation

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NX242 versus NX241: What's new ?

The NX242 Digital TDcontroller has been designed in order to provide total compatibility with its
predecessor – the NX241 Digital TDcontroller.

What's remain the same?

The DSP resources for both models remain the same, so new supported set-ups (i.e. firmware loads) will
be compatible with the both the NX241 and NX242 TDcontrollers. For advanced set-ups and signal
processing NEXO has released the NXtension Expander Board, which has double the available DSP
resources.
MENUs and functions remain the same; no learning curve is needed to go from the NX241 to the NX242.
The same LOAD and NXWIN software is used to update both TDcontrollers. The transition is transparent
for the user. Note however, that the NX242 can't be flashed with LOADs prior to 2.21.
The appearance of the NX242 is identical to the NX241 except the model number. Therefore, you can
mix both units in the same rack without aesthetic problems. Please note however that both NX241 and
NX242 should have the same firmware revision (LOAD) to be phase compatible.

What's changed?

The overall performance of the NX242 has improved significantly: 10dB more on the dynamic range, less
distortion...
The layout and ground scheme of the unit have been totally revised to cope with the most demanding
situations founded in the field (low and very high frequencies). The EMC protection on every input/output
and the new ground structure makes the NX242 immune to interference far beyond the recommended
values founded in EMC standards. As a result, there is no need for the earth lift function found on the
NX241.
The input stage is truly floating and accepts important common mode offset (resulting from very long
wiring or difference of ground potential between two connected equipments) without affecting it's
headroom (28dBu) and performance.
The NX242 Digital TDcontroller uses a switch mode power supply (SMPS). This SMPS accepts
universal AC power input voltages in the range 90V to 264V, and requires no manual adjustment for
voltages in this range.
The NX242 is designed to accept the optional NXtension board with the ES-4 EtherSound interface and
the CAI interface, whereas the NX241 can only accept the CAI interface.
An external LCD contrast adjustment is now provided on the NX242.
NX242 USER MANUAL LOAD2_22
DATE : 12/3/2004
NX242 VERSUS NX241: WHAT'S NEW ?