It is my opinion that you must test conducted emissions at
both AC input conditions, and archive those test results.
The mechanisms for conducted emissions can vary greatly
whether you're at 110/60 or 230/50. Better test. A good
Power Supply will minimally exhibit that effect, but who
knows if you have that one.
Radiated is *very* unlikely to vary due to the AC mains,
however it can still change at the low end, but I've not
seen that happen much.
Why balking at doing such a simple, short test?
- Robert -
On Thu, 6 Oct 2005 08:46:33 +0530
[email protected] wrote:
> Dear Experts,
> Our product is a USB device connected to the PC
> USB host and
> operates at 5 volts D.C supply provided by the host
> system. Both FCC & CE
> insists that conducted emission testing is required for
> this kind of
> devices, with emissions measured at the a.c input side.
> Is it necessary to
> run 2 tests, one with a 230 volts 50 Hz a.c supply (for
> CE) and the other
> with 110 volts 60 Hz a.c supply (for FCC)?
>
>
> Sincerely
>
> K.Balasubramanian
> Project Leader - Hardware.
>
> -
-
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