RealTIME Transmitter Synchronization

NO POWER - NO PHONES - NO PROBLEM
WITH WIRELESS AUDIO LINKS

Up to 20-mile range.
VHF and UHF frequencies.
Accommodates moderate terrain and foliage.
Four-day operation without 120-volt AC power plug-in/recharge on the ALERT AM battery backup.
No third-party issues, e.g., monthly costs, dial-up disconnects and capacity overloads.

RealTIME Synchronization is an option for ALERT AM and ITS6000 radio systems that allows multiple stations on the same frequency to overlap signals and thereby increase their effective coverage area. The method assures minimal interference in overlapping signal areas, making it possible to minimize co-channel interference among stations. RealTIME Synchronization stabilizes the frequency of each transmitter in the system internally, using GPS (Global Position System) satellite reference. Typical station separation in a multi-station synchronized grouping is 6-10 miles.

Specifications

GPS receiver: 8-channel.

1 PPS outputs: DB-9 connector, TTL outputs, positive edge true:

#1 - 20% duty output <500μS accuracy, directly from receiver.
#2 - 50% duty output <1mS accuracy, regenerated.

Accuracy: 10 MHz @ 10 nS.

Power: 117 VAC, 50/60 Hz or 24 VDC.

Mechanical: 19" rack mount 1.6"H x 16.8"W x 9.4"D.

Audio Distribution Methods

Audio distribution to the synchronized radio stations may be accomplished over leased telephone lines, fiber-optics or wireless. Note: ISS audio distribution methodology is distinctive in that it relies only on continuously available links to distribute audio. This guarantees that all stations are broadcasting the same message at the same time.

1 - LEASED TELEPHONE LAND LINES - are universally available as a means to link audio.

2 - FIBER OPTICS - offer an excellent means of distributing audio where available.

3 -WIRELESS AUDIO LINKS (WAL) * - an initial investment in Wireless Audio Links system has the following advantages:

No monthly cost to operate.
Excellent signal quality.
Unaffected by power outages.
Unaffected by weather disruption that can affect phone and fiber lines.

Wireless Audio Link range is up to 20 miles with line-of-sight. Yet relatively low VHF/UHF operating frequencies mean the signal will accommodate some terrain and foliage.

Battle Creek, Michigan, the first US community to have the WAL capability, now distributes audio among the City's three synchronized ALERT AM stations. The three locations enable listening to 1610-kHz-broadcasts over an 18-mile stretch of Interstate 94, making WAL an ideal communication tool should an incident close the freeway occur.

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* NOTE: The Wireless Audio Link system is analog based and does not require or use digital or IP-based equipment to function.