Motorola MOTOTRBO SYSTEM PLANNER Specifications download pdf (Page 154)

System Design Considerations 145

November, 2008

• Voice and Data: 7K60FXE

The first four values are defined as the ‘Necessary Bandwidth’. This can be derived from the

99% Energy Rule as defined in Title 47CFR2.989. The next two values are the ‘Modulation

Type’ and the ‘Signal Type’. The final value is the ‘Type of Information’ being sent. More

information can be found with the region’s frequency coordinating committee.

• International Coordination – For stations near another country’s border, refer to a

frequency coordinating committee for licensing frequencies adjacent to that country.

• Antenna Information – You must also provide the following information about your

antenna:

• Structure. The most common codes are:

• B - Building with side mounted antenna

• BANT - Building with antenna on top

• MAST - Self-supported structure

• PIPE - Pipe antenna

• POLE - Any type of pole antenna

• TOWER - Free standing guyed structure used for communications purposes

•Height

• Antenna Height – Antenna height from ground to tip, in meters.

• Support Structure Height – If antenna is mounted on top of a building, it is the

distance from ground to the top of the building. Check with the building management

company for this information.

• Coordinates – Latitude and longitude should be listed in degrees, minutes and

seconds.

• Site Elevation – The antenna site ground elevation above sea level. This information

should always be in meters.

4.3.2 Converting Existing 12.5/25kHz Licenses

The process for converting 25kHz to 12.5kHz varies between regions. It is recommended to

contact the local frequency coordinator’s office to inquire how to re-file existing frequency

allocations. There are also consultants that specialize in frequency coordination and can advise on

the filing process. In the US, the following are general guidelines for frequency licenses:

• For existing 12.5kHz license(s), the user needs to file an update to the emission designators

indicating 7K60FXE (for voice) and 7K60FXD (for data) for all applicable frequencies.

• If the user has existing 25kHz licenses(s), they need to file an update to the emission

designators to include 7K60FXE (for voice) and 7K60FXD (for data) for all applicable

frequencies. Typically, the user will then be allowed to transmit a 12.5kHz signal bandwidth

at the same center frequency as the original 25kHz license. Please note that it is not a

straightforward process to convert an existing 25kHz license into a pair of 12.5kHz

channels. Users are generally NOT allowed to split their 25kHz channel into two 12.5kHz

sub-channels that would operate off center from the original license and adjacent to one

another.

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Motorola MOTOTRBO SYSTEM PLANNER Specifications Page 154