Nice. Well, I've got the one from ubiquity on the way, but I'll try
the MW one next time.....
Brian
Ron Wallace wrote:
Brian,
That device is designed to allow operation across the full 902-928 spectrum, with the notch specifically at 928 to knock-out the pagers.
>From my MW xmit days we used MW Filters almost exclusively, well known in the Common Carrier ind. & The guy that started the company went to Michigan, was building filters in his garage as a grad student in Ann Arbor. For whatever thats worth.
Ron
-----Original Message-----
From: Brian Rohrbacher [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 20, 2007 04:18 PM
To: 'WISPA General List'
Subject: Re: [WISPA] failing Canopy 900
yes, but I'm still unclear about what center frequency I could use with
it. Thw spec sheet didn't clear it up. I'll have to try to call them back.
Brian
Jack Unger wrote:
Thank you, Brian. The price is certainly right on that filter.
Brian Rohrbacher wrote:
Sharing the info I am............
Hello, Brian
Thank you for your interest in Microwave Filter Company.
The filter that you inquired about is the:
Notch Filter
MFC P/N 15345
$164.00 unit cost plus shipping
Shipment 1 week after receipt of order
Attached is the specification drawing of the filter that you
requested. If you have any questions or concerns, please contact me
direct.
Regards,
Bob Haytko
Customer Relations
Microwave Filter Co., Inc.
Tel: 315-438-4725 (direct)
Fax: 315-463-1467
Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
Jack Unger wrote:
Brian,
Bandpass filters come in different band "widths". Some are full-band
filters that pass 902-928 MHz and some are single-channel filters
that are narrower and pass only one channel. The bandwidth of the
two Ubiquity filters are a little narrow to use across the entire
band but if you are using 912 or 917 as center frequencies, they
should work well. If you're using a lower center frequency, you'll
need a filter that has a bit wider bandwidth but which still
attenuates the paging frequencies a lot. The availability of good
whole-band bandpass filters seems to have deteriorated a bit in the
last year. There are more filters available but they seem to have
poorer characteristics and sometimes higher prices. I just looked at
RFLinx and Hyperlinktech and I am not happy with their current
offerings. I did discover a notch filter that is tuned to attenuate
the paging frequencies while passing the 902-928 frequencies. I
don't know the pricing but if it's priced reasonably then it looks
like your best bet. Here's the link:
http://www.microwavefilter.com/2ghzRelocation.htm#ism
It's the filter at the bottom of the page. If you call them to get a
spec sheet and to check pricing, please share that info.
Thanks,
jack
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