[RFI] UPS suggestions

[Pierfrancesco Caci]

Hello,
I need to get an UPS for my home office, which shares the same desk as
the radio. Hence, I'd appreciate your comment on the possible choice.
There are basically 3 types of UPS for home use:

Stand-by: the inverter only fires up when mains loss is detected. This
is the most basic type.

Line-Interactive: a microprocessor monitors the quality of the mains,
and the inverter can be used to correct low voltage conditions and other
anomalies. In normal mains working, the inverter is not used. They also
incorporate a stabilizer/filter for the mains when not using the
inverter.

On-line: they have a double-conversion ac/dc/ac and the inverter is
always online. These are usually recommended for the most sensitive
equipment, as they supposedly protect much better from
micro-interruptions. 

Besides these 3 categories, the other key difference is the waveform of
the inverter. The most expensive ones approach sinusoid better. 

So, to go down to the heart of the question: should I be lured by an
on-line, sinusoid waveform UPS, or am I likely to get lower RFI from a
line-interactive one that doesn't keep the inverter on at all times?

The UPS would be used only for the PC, Monitor, switch and maybe the
printer if there's a filtered, non-protected port. 


Thanks

Pf

-- 
Pierfrancesco Caci, ik5pvx