A wider filter with steep skirts tends to cost more.
Constraints on noise figure, dynamic range, group delay. and flatness
add more cost
and power consumption.
On 09/30/2011 08:11 AM, Bob Bownes wrote:
Exactly. The narrower the filter, the more it will cost. In general.
On Fri, Sep 30, 2011 at 11:10 AM, Tom Holmes<thol...@woh.rr.com> wrote:
Sticking with the intent to keep this non-political, what good is a filter
if the offending signal is within the necessary passband?
Tom Holmes, N8ZM
Tipp City, OH
EM79
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chuck Forsberg WA7KGX N2469R
Sent: Friday, September 30, 2011 10:55 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS Interference Question
If LightSquared deploys their high powered LTE network in the satellite
band
the GPS world will become very interesting indeed. Are LightSquared
willing
to spend $20,000 to upgrade the GPS on my Skylane to a new model which
does not yet exist?
With that many transmitters we may experience areas where RF from multiple
high power transmitters creates hot spots. In some places pieces of metal
with non Ohmic bonds will create mixing products, some of which may fall
directly within GPS bands. These effects have not been simulated.
Who knows who the FCC is listening to - the GPS industry including
millions
of current users, or those who appear to have bought under the table
favor.
This could make Solyndra look like small change. Film at 11.
On 09/30/2011 07:02 AM, Marco IK1ODO -2 wrote:
At 15:44 30-09-11, Jason wrote:
To filter out the L2 signal, would an actual GPS receiver have to be
replaced / modified?
Or would a more simple and cheaper alternative be to get a new
antenna (with fancy filtering) to replace my existing roof-top
antenna and expect all my old equipment to be happy?
I think that a new antenna/filter/amplifier unit would be ok. But the
problem is the installed base of receivers, including all those costly
units used for geodesy or navigation, that have embedded antennas.
Those will be hard to modify.
73 - Marco IK1ODO
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--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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