No. It is emissions from the DC to DC converter on the board. With no
cards and no ethernet connection, using just a power supply, it can emit
up to +30db of noise in both of those bands.
I have setup several tests with our spectrum analyzer. The board uses a
very cheap DC to DC converter.
We shut down several HAM operators and even the regional ambulance
two-way radio system (and our tower was 300ft away from their tower). We
switched to 18v PoE instead of 48v PoE and that stops 90% of the noise
at 450mHz. However, there is still substantial noise at 145mHz, but the
HAM guys can work around that.
The board will never pass FCC certs. Mikrotik knows it, thus the reason
they never responded to emails and they _deleted_ the message thread on
their forum that I created over a year ago. :(
Travis
Microserv
Smith, Rick wrote:
well yeah, but aren't those Ethernet emissions?
I had trouble interfering with HAM repeaters until I went to 10 mbps...
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Travis Johnson
Sent: Sunday, June 10, 2007 10:47 PM
To: WISPA General List
Subject: Re: [WISPA] How much does FCC certification cost?
The current 532 board will NOT pass FCC certs. Too much noise coming
directly off the board at 150mHz and 400mHz ranges. Thus the reason it
has never been FCC tested.
Travis
Microserv
joelaura wrote:
So are we saying that it would be under 5K to get MT certified with
different antennas? If thats the case why wouldnt they have done it?
Seems like they would have a much bigger market if the stuff was
certified. Joe
-----Original Message-----
From: "Jack Unger" <[EMAIL PROTECTED]>
Sent 6/10/2007 7:17:42 PM
To: "WISPA General List" <[email protected]>
Subject: Re: [WISPA] How much does FCC certification cost?
Depends on the amount of lab-time testing needed.
You can minimize test time (and cost) when you use a wireless card that
has already received a modular approval from the card manufacturer along
with a "clean" single-board computer (SBC) motherboard, a clean power
supply plus software that dis-allows operation (or excess radiation)
outside of the U.S. band. That combination costs about $3219 to certify.
I recommend certifying with a range of antennas (the entire range of
antenna types that you're likely to use).
Hit me off-line for more detailed info.
jack
D. Ryan Spott wrote:
?
ryan
--
Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc.
FCC License # PG-12-25133
Serving the Broadband Wireless Industry Since 1993
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