[RFI] RFI Power Supplies

[CR]

On 6/5/2014 11:43 PM, CR wrote:
>
> I HAVE noticed, after the batteries (two 6V 200AH deep cycle 
> batteries) are discharged a while, that when the power comes back on 
> and the DLS-55 gets to serious charging, there is very noticeable RF 
> noise around IIRC 2.8 MHz. Will have to measure the noise. There's a 
> SA sitting right over it on a table; why not? Heh! 

The charger is to blame; conducted emissions in the inverter power lead 
rise as much as 40 dB (at 2.36 MHz) when the charger is plugged into the 
outlet strip.

A closer look with a single sweep tells me (no surprise) the charger is 
running at a very light load.  I suspect this is pulse-skipping to 
accommodate the float state.

Frequencies below in KHz.

467.0 * strongerr (25-30dB) peaks
475.6# Lower peaks
483.7#
492.35#
500.6#
509.1  *stronger



Cortland