This has me bemused; when I was new in the trade, I worked for Wang Labs
in Tewksbury, Massachusetts. In fact, I got into the trade there (during
the interview i asked to be allowed to play with the receiver -- fun!)...
Our chamber was not tall enough to raise antennas to 4 meters; the
buildi
Bill,
I'd guess 6dB as in voltage, with dBuV being used.
Michael Sundstrom
OHD / TREQ Dallas
Electronic Lab Analyst, EMC Lead
2170 French Settlement Rd, Suite B
Dallas, Texas 75212
(214) 579 6312
(940) 390 3644c
KB5UKT
Albert Einstein once said, "The definition of insanity is doing the same thi
In message <1324530145.50231.yahoomail...@web39603.mail.mud.yahoo.com>,
dated Wed, 21 Dec 2011, Bill Owsley writes:
Thus, the received voltage received via a direct path added with a
reflected path, assuming no distance or reflection loss, would be 6 dB
higher than the direct path alone. Thi
Voltage or power, a dB is a dB. Constructive interference between the
direct and reflected ray (given a perfectly conductive ground plane) can
increase the field intensity by a factor of two if the phase difference
between the two is a half-wavelength. That is 6 dB, whether you speak of
the field
There is a theoritical NSA program on the ETS website that will calculate the
NSA for any given distance and scan height. I used it to generate numbers for a
compliant 3m site (1 to 4m recieve scan height) and then ran the numbers with
the transmit and recieve antenna heights at something like 3
I heard that the omission of EN 61000-3-2 in earlier editions of the
general medical EMC standard (EN 60601-1-2) led people to think EN
61000-3-2 did not apply to medical equipment, even equipment for home
or office use.
The line harmonics standard was added in later editions of the medical
stand
In message <6ao6f7p76evlg7fn7qsgr5bkdtp3ddv...@4ax.com>, dated Thu, 22
Dec 2011, Pat Lawler writes:
I heard that the omission of EN 61000-3-2 in earlier editions of the
general medical EMC standard (EN 60601-1-2) led people to think EN
61000-3-2 did not apply to medical equipment, even equipm
On 12/22/2011 9:27 AM, John Woodgate wrote:
If the direct and reflected rays are equal amplitude and in phase,
then it's +6 dB; if they are at 180 degrees, it's minus infinity dB.
In between you can get any value, depending on relative phase and
transmission loss.
Equal amplitude only occurs
In message <4ef37136.5070...@earthlink.net>, dated Thu, 22 Dec 2011,
Cortland Richmond writes:
On 12/22/2011 9:27 AM, John Woodgate wrote:
If the direct and reflected rays are equal amplitude and in phase,
then it's +6 dB; if they are at 180 degrees, it's minus infinity dB.
In between you ca
Orgalime position paper:
"EU manufacturers suffer from malfunctioning
of the US certification market: potential
abuse of dominant position"
http://www.orgalime.org/Pdf/PP_possible_abuse_of_dominant_position_in_US_cer
tification_market_oct11.pdf
"This practice of denying recognition of
compone
As usual, Mr Nute finds the good stuff.
The root problem may be in the historical process - back when FM and UL were
explicitly stated in OSHA code. This is no longer the case, but continues
when the phrase "UL approval" is used to indicate 'NRTL' approval.
My employer has problems with this, but
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