NARROWBAND ANALOG OPERATION

WHAT IS NARROWBANDING? DIVIDING OF FREQUENCIES IN ½ WIDEBAND = 25 KHz NARROWBAND = 12.5 KHz

TOTAL OF 480 FREQUENCIES AVAILABLE TO ALL FEDERAL GOVERNMENT AGENCIES IN WIDEBAND WE HAD TOTAL OF 960 FREQUENCIES AVAILABLE TO ALL FEDERAL GOVERNMENT AGENCIES IN NARROWBAND WE NOW HAVE

AVIATION COMM 2005 AS OF 1/1/2005 – NARROWBAND ANALOG OPERATION FOR FIRE COOPERATOR CHANNELS CAN STILL BE PROGRAMMED IN WIDEBAND ON THEIR FREQUENCIES ALL RECEIVERS SHOULD BE MULTI- MODE IN NEW APCO PROJECT 25 RADIOS FROM NOW ON

DIGITAL IS NEW TECHNOLOGY THAT WILL ALLOW FURTHER SPLITTING OF FREQUENCIES AND WILL PROVIDE FOR MORE FLEXIBILITY, MORE FEATURES, AND CLEARER COMMUNICATIONS DIGITAL NOT REQUIRED AT THIS TIME FOR FIRE OPERATIONS AIRCRAFT INVOLVED IN LAW ENFORCEMENT OPERATIONS MOST LIKELY TO USE DIGITAL AT THIS TIME APCO PROJECT 25 DIGITAL TECHNOLOGY DEVELOPMENT STARTED IN ALL AGENCIES NOTIFIED THEN. MANDATE TO GO NARROWBAND PRESENTED IN 1995 TO ALL AGENCIES

THINGS TO REMEMBER NARROWBAND VS WIDEBAND –OLDER RADIOS THAT ARE NARROWBAND ANALOG CAPABLE HAVE TO BE PROGRAMMED TO NARROWBAND, THEN TUNED ACCORDINGLY TO WORK PROPERLY –ISSUE CREATED WHEN RADIOS NOT PROPERLY SET-UP NARROW TO WIDE = AUDIO LOW, TURN UP VOLUME ON WIDEBAND RADIO WIDE TO NARROW = AUDIO LOUD, TALK INTO WIDEBAND RADIO WITH MIC TURNED SIDEWAYS SPEAK ACROSS MIC NOT DIRECTLY INTO IT

NEW RADIOS ARE CAPABLE OF OPERATING IN WIDEBAND & NARROWBAND ANALOG & NARROWBAND DIGITAL ON PER CHANNEL BASIS –WHEN PROGRAMMED PROPERLY NEW APCO Project 25 RADIOS WILL OPERATE IN ALL CURRENT SYSTEMS USERS SHOULD SET COOPERATOR CHANNELS TO MATCH COOPERATOR SYSTEMS

RADIO USER RESPONSIBILITY: –THAT ONCE SET, NOT TO CHANGE FUNCTIONAL PROGRAMMING ON THE RADIO DURING OPERATIONS. ONLY CHANGE FREQUENCIES AND GUARD TONES. –TO MAKE SURE RADIOS ARE UPDATED WITH CURRENT VERSIONS OF SOFTWARE. NIFC-NIICD WEBSITE – SELECT: RADIO SOFTWARE VERSIONS PHONE CONTACT:

NEW AM ASSIGNMENTS WITH THE SHORTAGE OF AM FREQUENCIES, ASSIGNMENTS ABOVE WILL HELP TO ADD MORE CAPABILITY FOR FIRE DURING TRANSITION TO 760 RADIOS, ASSIGNMENTS WILL HAVE TO BE MADE TO ACCOMMODATE LOWEST COMMON DENOMINATOR WHEN NECESSARY