Hi NMR community,
The college is installing (and were nice enough to ask for our input but
then told us they were going to do it whatever we thought) clocks that
synch up their time by broadcasting from a central location a radio
frequency signal at a discrete frequency somewhere between 72.1 and 72.9
MHz (exact frequency assigned by the FCC and would be known to us).
While there are few nuclei of interest to us in this region (for our 400
MHz instrument), I thought I would ask if anybody has any knowledge of
these systems affecting NMR instrumentation.
The transmitter is a 5 Watt transmitter, that in the worst case scenario
might be 50 feet from the instrument (very worst case installed on top
of our building), but probably will be on the order of 200-300 feet from
the instrument (the next building over). The transmitter broadcasts for
about 30 minute on/off stretches, throughout the day.
Does anybody know anything about these? I'll be happy to post a
collection of responses.
Andy
T. Andrew Mobley
1116 8th Avenue
Noyce Science Center
Grinnell College
Grinnell, IA 50112
Office: 641-269-4543
Fax: 641-269-4285
Received on Sat Oct 07 2006 - 11:09:06 MST