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MSF 5000 NARROWBAND??

This forum is for discussions regarding System Infrastructure and Related Equipment. This includes but is not limited to repeaters, base stations, consoles, voters, Voice over IP, system design and implementation, and other related topics.

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matt7x
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MSF 5000 NARROWBAND??

Postby matt7x » Tue Nov 15, 2005 9:46 am

Is a MSF 5000 CXB model narrawband capable??

Thanks
Matt

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alex
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Postby alex » Tue Nov 15, 2005 9:53 am

As far as I know there isn't. I don't know if there are modifications you can do out there - there might be - but it wouldn't be something I'd put in to commercial use.

MTR2000's and Quantars with the right hardware are narrow band capable.

-Alex

(also, this thread is a system infrastructre thread - and doesn't belong in general....)

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The Pager Geek
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Postby The Pager Geek » Tue Nov 15, 2005 11:54 am

http://www.selectone.com/narrow.htm

They list the MSF5000 kist at the bottom of the sheet.

Don't know anything else about it though... only it exists.

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Postby Will » Tue Nov 15, 2005 4:05 pm

Communications Specialists has the narrow crystal filters and kit for the MSF5k's.

If you can 'load' the frequency into the MSF5k, the TX dev. can be adjusted to 2.5k dev and it allready has the required TX audio filtering.

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Postby n1pfc » Sun Nov 20, 2005 7:22 am

Will wrote:Communications Specialists has the narrow crystal filters and kit for the MSF5k's.

If you can 'load' the frequency into the MSF5k, the TX dev. can be adjusted to 2.5k dev and it allready has the required TX audio filtering.


But does it actually meet FCC spec now being narrow band?I would think it would think that they would actually have to certify it for narrow band operation

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Postby airman1952 » Sun Nov 20, 2005 9:14 am

I'm not sure if this is what you are looking for.
This is a quote from APCO International:

New applications for 25 kHz bandwidth will be accepted until January 1, 2011
After this date, applications for greater than 12.5 kHz bandwidth will be accepted only if the equipment meets the efficiency standard of one voice channel/12.5 kHz bandwidth or 4800 bps/6.25 kHz (9600 bps for 12.5 kHz; 19.2 bps for 25 kHz)
Modifications of existing 25 kHz systems will be accepted until January 1, 2011
After this date, applications to modifications to 25 kHz systems which result in an expanded service contour will be accepted only if the equipment meets the efficiency standard of one voice channel/12.5 kHz bandwidth or for data, 4800 bps/6.25 kHz (9600 bps for 12.5 kHz; 19.2 Kbps for 25 kHz)
25 kHz equipment can be manufactured and imported until January 1, 2011
After this date, equipment operating at greater than 12.5 kHz bandwidth must meet the efficiency standard of one voice channel/12.5 kHz bandwidth or 4800 bps/6.25 kHz.
90.203(j) has been amended to allow certification of equipment operating at 25 kHz after January 1, 2005 if it meets the efficiency standards listed above. Effective date of 90.203(j)(5) has been stayed until the FCC releases a decision on the Manufacturers Petition for stay. (See next article).
The FCC also revised its rules to exempt Part 90 paging-only frequencies from the narrowbanding requirements.

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Postby Dan562 » Sun Nov 20, 2005 10:15 am

The MSF5000 CXB stations were capable of doing the 12Kb Securenet Transparent Cipher Mode format that required the 25 KHz RF Channel Spacing.


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