You guys are just gonna LOVE this....
----- Original Message -----
From: "expeditionradio" <expeditionradio@yahoo.com>
To: <illinoisdigitalham@yahoogroups.com>
Sent: Tuesday, October 16, 2007 11:14 PM
Subject: [illinoisdigitalham] We Need to Expand HF Auto Sub Bands Now
> The use of the Automatic Sub Bands on HF ham radio for digital data
> has been increasing tremendously over the past 5 years. Obviously,
> automatic and similar types of operation have become extremely popular
> with ham operators. This growth pattern appears to be continuing into
> the future as more digital methods and innovation are forged. The use
> of HF radios interfaced with computers is now commonplace, especially
> for ham radio emergency communications systems.
>
> When the Automatic Sub Bands were originally defined in the 20th
> century, the number of HF operators using automatic systems was much
> smaller than it is now. Currently, hams using these segments are
> experiencing severe congestion and longer waiting times for frequency
> availability, while adjacent band segments lay nearly dormant.
>
> There is now a great need to expand the Automatic Sub Bands,
> especially for the North America and European regions.
>
> A reasonable suggestion is that automatic sub bands be approximately
> 10% of each HF ham band. In other words, if an HF band is 350kHz wide,
> then at least 35kHz of it should be available as an automatic sub band
> for standard 3kHz bandwidth signals. It is especially important that
> 3kHz bandwidth be available, because this provides the best
> flexibility and enables modern fast time-division sharing methods for
> efficient spectrum use, with many stations sharing the same spectrum
> in short intervals of time. This trend is away from older slow data
> methods using frequency division sharing.
>
> Here are some suggested expanded frequency ranges
> for HF automatic band segments.
>
> 1805-1815 Worldwide
> 1990-2000 North America
> 3560-3610 North America
> 3590-3630 Worldwide
> 7100-7125kHz North America
> 7100-7110kHz Worldwide (in the new international band)
> 7035-7045kHz Worldwide
> 10140-10150 Worldwide
> 14085-14125kHz Worldwide (n 14099.5-14100.5 IARU beacon net)
> 18100-18109.5kHz Worldwide
> 21090-21135kHz Worldwide
> 24920-24929.5kHz Worldwide
> 28100-28199.5kHz Worldwide
>
> A push should be made by digital operators everywhere around the world
> to recognize and allocate band segments that are the same, or
> overlapping worldwide. This is needed to assure the interoperability
> and standardization necessary for emergency communications. It is in
> the interest of all HF ham operators for bandplanners and spectrum
> regulating authorities to designate adequate and reasonable portions
> of the HF bands for automatic use.
>
> 73---Bonnie Crystal VR2/KQ6XA
>
> .
>
>
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|