Emergency Alert System Dave Swift Zach Smith

Why EAS? Virginia Polytechnic Institute Client: Union College Campus Safety ◦Siren ◦Text Messaging ◦ ◦Web ◦TV (TVuC) ◦Radio (WRUC)

Overall Specifications Single point to initiate override of both TV and radio ◦Emergency control station (server)  Must always have TV-out enabled  Cannot have pop-ups on screen  Cannot automatically restart Points of failure ◦Power & internet required ◦Manual override should internet not be available Secure ◦Unique user name / password ◦Hardcoded IP address and port Reliable ◦Must not change the audio or video level ◦Response time of < 2 seconds from activation ◦FCC regulations

Design Hardware ◦Switch  8051  IC (CBT3244A) ◦Server  Linux Software ◦Java ◦C++ ◦MPG messages

Launch Sequence Campus emergency present User launches proprietary software Login (user name / password) User presented with list of pre-recorded scenarios User selects scenario from list Hardware activates ◦Software sends “activate” command to hardware switch ◦Scenario MPG launched full screen ◦Audio and Video streamed to TV ◦Audio streamed to radio Upon end of emergency, user repeats sequence, and chooses “ALL CLEAR” option ◦Hardware is reset ◦Normal broadcasting resumes

Current TVuC Layout Time Warner Headend (channel 21) Ch.2 Modulator WRUC A/V Switch - Includes 250gb HD, JPEG Slideshow Capabilities MiniDV (video 1) Computer (video 5) VCR (video 2) DVD 1 (video 3) DVD 2 (video 4) Monitor coaxcomposite audio a/v vga IP Connection tvuc.union.edu Network Patch Panel * note: a/v = mono audio and composite video connection

With EAS Additions Time Warner Headend (channel 21) Ch.2 Modulator WRUC A/V Switch - Includes 250gb HD, JPEG Slideshow Capabilities MiniDV (video 1) Computer (video 5) VCR (video 2) DVD 1 (video 3) DVD 2 (video 4) Monitor coaxcomposite audio a/v vga IP Connection tvuc.union.edu Network Patch Panel * note: a/v = mono audio and composite video connection EMERGENCY SYSTEM a/v

EAS Hardware Switch Emergency Computer TCP Connection (To SW Interface) Input B-2 Input B-1 Emergency Override (serial) Emergency A/V Switch Output 2 Output 1 Input A-1 Input A Microcontroller VOLTAGE OUT (Enables Input B)

EAS Switch Logic TV: ◦Input A-1: Normal Video ◦Input A-4: Normal Audio ◦Input B-4: Emergency Video ◦Input B-1: Emergency Audio Radio: ◦Input A-1: Normal Audio (left) ◦Input A-4: Normal Audio (right) ◦Input B-4: Emergency Audio (left) ◦Input B-1: Emergency Audio (right) Common: ◦Vcc: 5V DC ◦GND: Ground ◦Enable A, B: Active Low solid-state-a-v-switcher

Conclusions Single point to initiate override of both TV and radio ◦Emergency control station (server)  Single point to initiate override  TV-out always enabled  No pop-ups / automatic restart Manual override implemented ◦Client software installed on server ◦Additional methods of launching Secure ◦Unique user name / password required ◦IP address and port to be provided by ITS Reliable ◦Output levels = input levels ◦Response time of hardware ~0.1 seconds ◦FCC regulations met

Audio: 44.1 KHzVideo: 4.2MHz Attenuation

What We Have Learned Building specifications around a specific client Building hardware controllers with near 100% uptime & limited points of failure Preventing computer from crashing Learn how each other’s setup functions TCP/IP connections in both Java and C/C++ Scripting

To Be Implemented… Actual hardware implementation Install client software Final design paper Final modifications and updates to Web User manual

Future Design Designing printed circuit board Software GUI Broadcast messages “on the fly”

Questions?