|
Location |
Agency Name |
Type of Service |
Type of System |
Frequency |
Interference Source |
Resolution |
Comments |
|
Chandler, AZ |
City of Chandler |
Police, Fire, and Public Works |
Trunked 800-MHz, MDT Data 800-MHz |
806-821 |
Nextel, and possibly others |
None |
Depending on cell site, a cone of silence may be from 200 yards to 1/4 mile. |
|
Phoenix, AZ |
Phoenix Police and Fire Dept. |
Police and Fire |
Mobile Data |
821-824 |
Nextel |
None |
Currently 3/4 mile interference radius around Nextel towers. Boosting power
to mitigate interference and Nextel experimenting with filters. |
|
Victoria, BC |
Corp of the City of Victoria |
Police, Fire, EMS, Public Works |
Conventional VHF |
N/A |
Clearnet? |
None |
Portables talkout problems, static in mobiles, blocking. |
|
Ontario, CA |
N/A |
Police, Fire, EMS, Public Works |
N/A |
N/A |
N/A |
N/A |
|
|
Richmond, CA |
State Department of Transportation |
Public Safety/Special Emergency |
Trunked, Analog, Voice |
806-821 |
Nextel? |
None |
Coverage marginal when system installed. Now significant signal on data
channel but radios are unable to access trunk site (Big Rock). Interference
at Richmond/San Rafael Bridge Toll and adjacent maintenance station. |
|
Denver, CO |
Denver Police Department EEB |
Police, Fire, EMS, and Public Works |
Trunked Analog and Digital Voice with MDTs |
806-821 |
Nextel and possibly cellular |
None |
Changed frequencies many times without success. Numerous sites cause loss
of control channel. |
|
Lakewood, CO |
Lakewood PD, West Metro FD |
Police, Fire, EMS, Public Works, Parks, College Security, and Mall Security |
Trunked, Analog, and Digital Voice |
821-824 |
Nextel |
None |
Appears to have front end overload which Nextel is working on. |
|
Ft. Lauderdale, FL |
City of Fort Lauderdale |
Police, Fire, EMS, Public Works, and Beach Patrol |
Trunked |
821-824 |
Nextel |
None |
MTS-2000 handhelds desense near Nextel Sites. |
|
Ft. Lauderdale, FL |
Broward County Telecommunications |
Police, Fire, EMS, and Local Government |
Trunked, Simulcast, Voice, and Analog |
806-821 |
Cellular sites |
None |
Noise floor raised by near-by cellular sites. Mobiles not able to access
system. Use of spectrum analyzer does not identify discrete interfering
signals. |
|
Largo, FL |
Pinellas County Government - Radio Division |
Police, Fire, EMS, and Public Works |
Trunked Analog Voice System |
806-821 |
Nextel |
RFI addressed on case-by-case basis. Nextel then changes frequency |
|
|
Miami, FL |
Information Technology Department |
Police, Fire, EMS, Local Government, Public Works, and Transit |
Trunked, Analog, and Digital |
N/A |
Nextel |
None |
Nextel has a new site that caused new coverage holes. |
|
Orlando, FL |
Orange County Sheriffs Office |
Sheriff |
Analog 806/821 Trunked |
806-821 |
Nextel OrlaVista Site |
None |
|
|
Stuart, FL |
Martin County Fire Rescue |
Fire and Rescue |
Trunked 800 |
821-824 |
N/A |
N/A |
|
|
Atlanta, GA |
Fulton County Emergency Communications |
Police, Fire, EMS, Public Works |
Trunked, Analog, Data |
806-821 |
Cellular providers in Fulton Industrial Boulevard Area |
None |
Portables desensed in industrial blvd area |
|
DeKalb County, GA |
DeKalb County Public Safety |
All public safety |
Trunked |
806-821 |
Nextel and Southern Linc |
None |
Both systems have frequencies adjacent to control channels. When close to
commercial site, blanks out radio. |
|
Douglasville, GA |
City of Douglasville |
Police, Fire, Hospital, and Public Works |
Trunked |
806-824 |
Cell Towers |
None |
New holes have appeared where coverage had been present. New cell towers
installed. Radio system operating within specifications. |
|
Savannah, GA |
City of Savannah |
Police, Fire, EMS, Public Works, and City |
Motorola 800-MHz Smartzone Analog |
806-824 |
Nextel |
None |
Some commercial subscriber units operate only 100 kHz away from the city's
control channels. The filters on the city's equipment are maxed out. A
safety concern was expressed. Receiver desense due to frequency proximity
and distance of Nextel units. |
|
Lahaina/Kihei, HI |
Maui County Police Department |
Police, Fire, EMS, Public Works |
Trunked |
821-824 |
Nextel |
None |
Noise floor raised. Radios in vicinity of cellular transmitters are
unusable |
|
Olathe, KS |
Johnson County Sheriff's Office |
Police, Fire, EMS, Wastewater Water District, Airport, and County Bus
Security |
Analog Trunking System and Mobile Data System. |
806-824 |
Nextel and some other identified source. |
None |
Pulse-like interfering signal that moved randomly across three channels and
caused bursts of static. |
|
Baton Rouge, LA |
Louisiana State Police |
State Police/Other State and Federal |
Trunked |
806-824 |
N/A |
None |
|
|
Duxbury, MA |
N/A |
|
|
|
|
|
No other information provided. |
|
Baltimore, MD |
N/A |
Police, Fire, Public Works, Schools, Highways, Utilities |
Trunked |
806-821 |
Nextel |
None |
Overloading front end |
|
Auburn and Lewiston, ME |
Lewiston/Auburn 911 Emergency Comm |
Police, Fire, EMS, Public Works, and City |
Digital, Motorola Astro |
N/A |
Paging, and other commercial transmissions |
Relocating transmitters and adding voting receivers |
Working with Comp Communications of Verooes, NJ |
|
Howell, MI |
Michigan State Police |
Police, Fire, EMS, and Public Works |
APCO 25 Compliant Digital Trunked |
821-824 |
Cellular 870-MHz Band |
None |
Intermittent loss of audio, garbled audio, and loss of ability of one unit
to hear audio. New monopole towers with sectorized panel arrays have been
installed in area. |
|
Gladstone, MO |
Gladstone Department - Public Safety |
Police, Fire, EMS, Public Works |
Conventional |
806-821 |
Licensed Nextel tower site in Liberty |
None |
Nextel has obtained licensing on 851.4875 and 854.6375 at 1,000 watts.
These are mobile transmitter frequencies for this agency. |
|
Cary, NC |
Town of Cary |
Police, Fire, EMS, Public Works, Inspections, and General Government |
Analog Trunked |
806-821 |
N/A |
None |
Interference on one channel. |
|
Tigard, OR |
WCCCA |
Police, Fire, and EMS |
MDT and Analog Trunked |
806-824 |
Nextel |
None |
Two years of problem with a documented officer safety issue as a direct
result. Radio had out-of-range tone due to Nextel overloading portable. |
|
Memphis, TN |
City of Memphis |
Police, Fire, EMS, Public Works, Gen. Services., Park, and Local Government. |
Trunked |
821-824 |
N/A |
None |
Carrier on M859.4625. Carriers usually on control channels. |
|
Missouri City, TX |
Missouri City Police Department |
Police, Fire, EMS, and Public Works |
Trunked Analog |
806-821 |
N/A |
N/A |
|
|
Bellingham, WA |
Wiztronics, Inc (Private) Backup for public safety system |
Fire, Public Works |
Trunked, Analog, Voice |
N/A |
Nextel |
None |
Digital signals in combining stages caused broadband noise. |
|
Seattle, WA |
City of Seattle |
Police, Fire, EMS, Public Works |
SmartZone trunked system and Motorola/MDI MDT system |
806-821 |
Nextel Site at 45th and Roosevelt |
None |
|
|
Seattle, WA |
King County |
Police, Fire, EMS, and Public Works |
Analog and Digital Trunked, MDT |
806-824 |
Nextel |
Nextel reduced power, removed some frequencies, changed antennas and
uptilted new antennas |
|
|
Seattle, WA |
Port of Seattle |
Police, Fire, Maintenance, Operations |
Trunked |
806-821 |
Nextel |
None |
|
|
Vancouver, WA |
Clark Regional Communication Agency |
PSAP, Police, Fire, EMS, Public Works, and Transit |
Trunked Analog, Data |
806-824 |
Nextel |
None |
Desense within 1/4 to 1/2 mile of Nextel sites. |
|
Vancouver, WA |
WSDOT |
Highway Maintenance |
EF Johnson Multinet |
806-824 |
Nextel site at I-205 and SR 500 |
None |
Four sites overlap area and have moderate signal levels. Signals drop out
and receivers squelch up tight. No communications are possible in the
clover-leaf. Measured -20 dbm carriers from Nextel site about 1/4 mile
away. Several cell sites in area do |
|
Green Bay, WI |
Green Bay Police |
Police, Fire, EMS, Public Works, Transit, Parks |
Trunked |
810-816 855-861 |
Other Public Safety Agency |
None |
|