Hello Group,
I would like to conduct a brief survey regarding some common aspects of an
OATS. I will summarize and publish the results.
How many labs
1) have a screen mesh OATS? If not mesh, what do you use for the
ground plane?
2) use mesh with an opening size of .25 inch? If some other size,
please specify. If there is a specific reason for your choice, please
explain.
3) use tuned dipoles for NSA measurements of OATS? Are the sets
"reference antennas" per C63.5? If you do not use dipoles, what are your
antennas of choice (manufacturer and model)?
4) use a spectrum analyzer with a tracking generator with tuned
dipoles for NSA measurements of OATS?
5) use a REFRAD with tuned dipoles for NSA measurements?
6) have had deterioration of their OATS that showed up at a band of
frequencies centered around 100 MHz? Other frequencies? Please describe
the environmental conditions of your OATS and how old the site was when
deterioration began.
7) use the antenna factors provided in C63.5 for their reference
dipoles? If not the C63.5 factors, which factors do you use and why?
8) use the mutual correction factors for the NSA identified in
C63.4 1992 when measuring the NSA on a 3 meter site? How many labs use the
mutual correction factors specified in C63.5 1988 when measuring the NSA on
a 3 meter site? What drove your choice?
Unsolicited comments are welcome.
Thanks in advance for your inputs.
Don Umbdenstock
Sensormatic
561-989-7454
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