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Old 07-15-2010, 9:14 AM
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Question 12.5 KHz Narrowbanding

Can anyone explain what the difference is between an 11K0F3E and 11K2F3E emission designator is other than the obvious .2 KHz? On the face of an FCC license is this merely an equipment issue?
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Old 07-16-2010, 1:20 PM
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It's essentially the same thing. The difference could be accounted for by something like the highest modulating frequency. Example:

3.0 KHz highest modulating frequency and 2.5 KHz deviation would be 11K0F3E.

3.1 KHz highest modulating frequency and 2.5 KHz deviation would be 11K2F3E.
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Old 07-16-2010, 5:01 PM
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11k2f3e refers to 11.25kHz of occupied or authorized bandwidth.
The highest modulating frequency is 3.125kHz.

12.5kHz and 25kHz refer to the channel bandwidth or spacing. The authorized bandwidth is narrower than the channel spacing. The emission designator (11k2f3e for example) tells the authorized bandwidth and the modulation type.
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Old 07-17-2010, 12:34 AM
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Is there a program out there that will decode the emission code and tell you the band width and modulation without having to remember what all those Numbers and letters mean.

Thanks,
Bob
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Old 07-17-2010, 1:25 AM
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It's not complicated enough to need a program. An handy chart will do nicely... like this one:

http://www.comsearch.com/articles/emission.pdf
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