[BC] Can't Get A Direct Answer

[Lamar Owen]

On Saturday 27 October 2007, Tom wrote:
> I have two APCs; one branded IBM - no excessive noise from either one.
> Be sure the units are grounded properly (some wall outlets I've seen
> are NOT code; the neutral is jumpered to ground AT THE OUTLET! -
> needless to say, THAT got fixed boo-coo quick!)  They're 750 VA each;
> one's carrying the automation computer and the board, the other one's
> carrying THIS computer and the modem and LAN switch.  I get more hash
> from the monitors than the UPSs.

Here at PARI, with sensitive radiometers on site, I have to be quite careful 
with the beaucoup UPS's I have here.  I use APC SmartUPS RM3000's for the 
most part; they are quite quiet.

Monitors are rather loud; but not at the frequencies in which we are 
interested (mainly the 300-350MHz pulsar band, the 1420MHz neutral hydrogen 
line (and a couple hundred MHz each side to accomodate red and blue shift), 
the various hydroxyl lines around 1667MHz, continuum radiation in the 
2.3-2.4GHz band (no WiFi here!), the formaldehyde absorption line around 
4.8GHz, the methanol maser line at 6.6GHz, continuum radiation in the 8.5GHz 
area, and the 22GHz water maser line).
-- 
Lamar Owen
Chief Information Officer
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC  28772
(828)862-5554
www.pari.edu