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6059Re: [BCD396XT] Uniden will introduce it's new Digital Handheld Scanner next year 2012

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  • Lance
    Nov 16 11:23 PM
      Joe,

      Are you aware a VHF radio in an F-16 can transmit 116.00-151.975mhz?

      This implies "Sharing" of the spectrum...

      Here's some of the comments from the Navy, Air Force, Marines, and Army regarding their concerns over reallocation of 225-400mhz band.

      From NTIA:

      Currently the Federal Government through, the Federal Wireless Policy Committee (FWPC), the Federal Wireless Users Forum (FWUF), the Federal Law Enforcement Wireless Users Group (FLEWUG), and the Federal Wireless Review Office (FWRO), are examining the entire range of Federal use of wireless services, including the land mobile radio services. These groups are working to ensure that the emerging wireless services satisfy Government functional requirements. It is also the responsibility of these groups to ensure that Federal users of wireless services can smoothly transition to more spectrum efficient, interoperable, and cost-effective digital technologies.

      The 225-400 MHz band is allocated and used for military fixed and mobile communications, military mobile-satellite communications, aeronautical radionavigation functions, and radio astronomy observations. The Preliminary Report provided an overview of the Federal use of the band for fixed, mobile and satellite applications. DOD stated that the 225-400 MHz band is the single most critical spectrum resource of the military tactical forces. There are estimated to be over 75,000 Federal air-to-ground and ground-to-air radio equipments alone operating in this band. This does not include mobile-satellite equipments and backbone point-to-point capabilities, such as the Army's Mobile Subscriber Equipment (MSE) system. DOD reports that extensive peacetime training and alert exercises using these equipments are conducted at military bases throughout the United States to maintain combat readiness. DOD asserts that the military use of this frequency spectrum is predicated on the same technical reasons as the non-Federal users: low atmospheric and foliage penetration losses, availability of inexpensive components, and the ability to use short whip antennas for omni coverage by hand-held units.[EN 82]

      Navy states that by their very nature ships and aircraft are very crowded which results in considerable cosite problems that require all the frequency flexibility available to accommodate their requirements in this band. "Aboard ship the intermodulation products inevitably caused by exposure of metallic joints to salt spray combined with the requirement for dozens of UHF communications nets presents a major problem which has been the focus of major efforts for the past 30 years."[EN 83] Navy further states that the need to take these effects into account while various forces shift their tactical relationships and missions on a real-time basis has required a major effort to develop spectrum management programs for task force commanders. Navy contends that any reduction in the 225-400 MHz band available for this spectrum management will have serious consequences in training and operational capability, particularly in joint exercises and operations, such as Desert Shield and Desert Storm.

      Subsequent to release of the Preliminary Report, DOD provided further amplification on use of this band.[EN 84] Reports from numerous military commands throughout the country expressed concern that loss of access to portions of this band would cause severe spectrum crowding in the remaining portions, leading to significantly increased training costs, degradation of command and control, and possible safety concerns. However, DOD stressed that the most serious factors affecting reallocation are the extensive use of radios having the HAVEQUICK II frequency hopping architecture, mobile-satellite communications, and backbone point-to-point transportable capabilities. Air Force further states that other uses of this spectrum include support of critical missile and Expendable Launch Vehicle (ELV) launch operations, test range telemetry, remote control of targets, communications supporting Air Defense Sectors, reliable training communications, and support of the President of the United States.

      Air Force states that the HAVEQUICK family of radios is extensively deployed by the military services in a wide variety of fighter, tanker, close air support, reconnaissance, and bomber aircraft. Typical functions include approach/departure control at military airfields, air-to-air re-fueling operations, vectoring of fighter aircraft to engage hostile threats, and coordination between strike aircraft. Air Force reports that over 15,000 units are in their current inventory. The HAVEQUICK II radios have the capability of frequency hopping across many individual frequencies over the 225-400 MHz band. Air Force states that this basic architecture is necessary to provide two fundamental aspects that enhance the electronic countermeasures (ECM) resistance of frequency hopping radios: a large number of channels and a wide spread in the bandwidth covered by those channels. Air Force adds, "Interoperability between equipments is mandatory and frequency hopping radios must have the capability to hop on the same frequencies and under the control of a master clock."[EN 86] To maintain the necessary interoperability, Air Force asserts that all of the HAVEQUICK radios would have to be returned for reprogramming. Based on the conversion of HQI to HQII, Air Force maintains that such reprogramming is very costly and time consuming.[EN 87] Air Force indicates that to allow communications to continue while the modification is in progress, the modified radios must retain both the old and new capability until a specified change-over date. Existing radios without space for two sets of control software must be discarded. DOD expressed further concern over the loss of the anti-jam capability inherent to the HAVEQUICK II radios that would result from any loss of access to the full band. Reported costs from the various military commands that would result from reallocating any portion of the 225-400 MHz band total well over $1 billion.

      The Air Force Satellite Communications System (AFSATCOM) and Milstar Satellite Communications System use the 225-400 MHz band, including the 380-400 MHz band segment, to provide survivable, jam-resistant communications for strategic and tactical military over the horizon requirements. Examples include communications to base from aircraft flying close to the ground to avoid hostile radar, over the ocean connectivity with cargo aircraft, extraction of personnel from areas far from friendly forces, and quick communications establishment with National authorities at the start of and during humanitarian missions. DOD reports that if reallocation of any portion of the 225-400 MHz band occurred, AFSATCOM and Milstar systems users would be subjected to interference from non-Federal users, severely reducing the usefulness of critical communications during certain missions. Air Force adds that the on-orbit and in storage satellites cannot be retuned and military missions must still be performed. In addition to unavoidable interference to non-Federal users, DOD investment in equipment estimated at over $1 billion would be jeopardized.

      Army states that they are the primary user of line-of-sight multichannel radios in the 225-400 MHz band that are integrated as part of a theater wide network. Army uses these radios for terrestrial communications linking the functional areas of communications, command and control, intelligence, air defense, artillery fire support, aviation support, and logistical support. Army further states that this portion of the spectrum is critical to land force dominance.

      From the preceeding discussion it can be seen that the 225-400 MHz band is crowded with many disparate kinds of military telecommunications systems. These systems are able to work in the same environment at the same time due to disciplined users operating in a hierarchical command structure, an acknowledgment by users that interference will occur, and a highly structured military spectrum management system. DOD believes that none of these conditions necessarily exist for non-Federal users. At the very least, military use of this spectrum indicates that sharing by dissimilar services is a possibility worth considering. As directed by Congress, NTIA has initiated a strategic planning program to develop long-term spectrum planning. The first effort of the strategic planning program will identify the long-term spectrum requirements of both the Federal agencies and the non-Federal users. The long-range spectrum requirements identified below 1 GHz will be considered together with various spectrum management options, and as necssary, reallocation decisions will be made.

      Furthermore, the FCC has been directed by Congress to identify the spectrum needs of the public-safety agencies, and to report its findings to Congress. In response to this Congressional mandate, on February 9, 1995, the FCC released the "Spectrum Needs through the Year 2010" report. NTIA, as well as, the Federal wireless working groups (e.g., FLEWUG, FWPC, and FWRO) will consider these spectrum needs in their long-term spectrum planning programs.

      ---

      From NTIA Ch. 4, USA Allocation is on the right hand column:




      Seems shared, interoperability...



      On Nov 16, 2011, at 8:02 PM, MCH wrote:

      > They may be able to, but they will have no channel allocations there.
      > So, effectively they would be transmitting out of their band.
      >
      > It's not going to be a shared band.
      >
      > Joe M.
      >
      > Lance wrote:
      > > It's still going to be shared by all the existing military aircraft...including the F-35 lightning.
      > >
      > > Unless Rockwell or Honeywell change their designs for the future, pilots will still be able to transmit 380.00-399.975mhz...
      > >
      > >
      > > On Nov 16, 2011, at 3:52 PM, MCH wrote:
      > >
      > >> No, that is the new trunking band. It's no longer MilAir.
      > >>
      > >> Joe M.
      > >>
      > >> Lance wrote:
      > >>> The radio has a gap from 380-399.995
      > >>>
      > >>> Makes no sense, being this is still within the UHF Mil band 225-400mhz.
      > >>>
      > >>> The top part of the band is active...especially at air shows...
      > >>>
      > >>> This could be easily changed in firmware before the radio is released...
      > >>>
      > >>>
      > >>>
      > >>>
      > >>> On Nov 16, 2011, at 2:47 PM, MCH wrote:
      > >>>
      > >>>> Looks like there will be a new USA model, but not digital.
      > >>>>
      > >>>> <<http://forums.radioreference.com/uniden-scanners/225939-bc125at-new-scanner-announcement.html>>
      > >>>>
      > >>>> Joe M.
      > >>>>
      > >>>> Frank Cardenas wrote:
      > >>>>> *This is for Australia only!!*
      > >>>>>
      > >>>>> On Wed, Nov 16, 2011 at 12:16 AM, Brian <mtnbiker2005ipn@...>wrote:
      > >>>>>
      > >>>>>> **
      > >>>>>>
      > >>>>>>
      > >>>>>>
      > >>>>>> Update from Uniden Facebook:
      > >>>>>>
      > >>>>>> Photo of the Uniden UBCD396XT.
      > >>>>>>
      > >>>>>> <
      > >>>>>> http://www.facebook.com/photo.php?fbid=10150378493757655&set=a.95066767654.88955.92508157654&type=1
      > >>>>>> <http://www.facebook.com/pages/Uniden/92508157654>
      > >>>>>>
      > >>>>>>
      > >>>>>>
      > >>>>> [Non-text portions of this message have been removed]
      > >>>>>
      > >>>>>
      > >>>>>
      > >>>>> ------------------------------------
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      > >>>>> Yahoo! Groups Links
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      > >>>
      > >>>
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      > >>> Yahoo! Groups Links
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      > >
      > > [Non-text portions of this message have been removed]
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      > >
      > >
      > > ------------------------------------
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      > > Yahoo! Groups Links
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