1. Dave Swift Zach Smith

2.  Virginia Polytechnic Institute  Client: Union College Campus Safety  Siren  Text Messaging  Email  Web  TV (TVuC)  Radio (WRUC)

3.  Shared responsibility between TV and radio  Pre-recorded messages from Campus Safety  Single point to initiate override of both TV and radio  Emergency control station  User (defined by campus safety) given a local URL to activate  User name / password  List of scenarios  Click link to activate  Points of failure  Power & internet required  Manual Override should internet not be available  Television override  Radio override  Secure

4.  Control station to store recordings  Must always have TV-out enabled  Cannot have pop-ups on screen  Cannot automatically restart  Launch Sequence  Emergency Code generated by Web site  Script programmed to launch an MPG containing a slide and audio  Hardware override  Force video out to modulator  Force audio out to modulator AND to radio  Audio streamed out via direct connection with WRUC  Modulation within specification

5.  Components  Broadcast Medium  Must be ready to transmit 99% of time  Must be crash resistant  Audio Switch  Must not change the audio level dB  Response time of < 2 seconds  FCC regulations  Software Design  Web Coding  Switch Control  ****MODULATION / AUTO TAKE OVER

6.  Spectral analysis  Signal levels  Modulation readings

7. 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 = composite mono audio and video connection

8. 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 = composite mono audio and video connection EMERGENCY SYSTEM a/v

9. Emergency Computer TCP Connection VIDEO (composite) AUDIO (composite) OVERRIDE (serial) To: Controller Control Station AUDIO OUT (composite) To: Modulator To: Radio IN* VIDEO OUT (composite) To: Modulator VIDEO IN (composite) From: A/V Switch AUDIO IN (composite) From: A/V Switch

10. PANIC = CODE IN FROM WEB INTERFACE AV_IN1 = IN FROM PROGRAMMING SWITCH AV_IN2 = IN FROM EMERGENCY COMPUTER AV_OUT1 = OUT TO MODULATOR AV_OUT2 = OUT TO WRUC (audio only) WHILE (1) { PANIC == 000 //normal mode AV_OUT1 = AV_IN1 //pass signal from programming switch AV_OUT2 = NULL //force radio override OFF IF (PANIC != 000) //if EMERGENCY override { WHILE (PANIC != 000) //hold until over { AV_OUT1 = AV_IN2 //force output to EMERGENCY COMPUTER AV_OUT2 = AV_IN2 //force radio override ON }

11. Legend Audio Signal Control Signal Block Already Exists Blocks to be Implemented

12.  Preliminary Design  Reconfiguring TVuC office space  Putting WRUC online for the year  IEF Grant  Block Diagram and Functional Decomposition  Design Paper Outline  Working with Campus Safety

13.  Temporary Solution to Campus Safety  Research  Controller / Op-Amps  Scripting  Design Paper  Web site  Radio Override Switch Controller Programming

14.  Scripting  Building hardware controllers with near 100% uptime & limited points of failure  Preventing computer from crashing  Learn how each other’s setup functions