Digital Alert Systems  


DASDEC EAS Digital EAS Encoder/Decoder and EAS Display Controller

By combining legacy EAS compatibility with modern LAN-based software driven communications methods and technology, the PC-based DASDEC offers a unique solution to the problems faced in transitioning from an analog to an all-digital broadcasting environment.

Furthermore, with the development and emergence of new network based public alerting schemes, the DASDEC system is designed to transition to meet new demands. Emergency alerting is becoming a managed network service. The DASDEC embodies this new environment with its inherent support for network protocols.

Optimized for emergency operation center control rooms, cable and Telco-TV local headends, broadcast control chains, NWS or NOAA offices, and in industrial, office, or school locations, the DASDEC is a simple yet sophisticated system. Remote access for setup, review, and operation of the system is provided via a Web browser. The initial setup of the system, or restoring the system to operation, requires far less time compared with other EAS products and is verifiable at any point. Configurations can also be saved onto and off of the box for backup or customization.

The system’s EAS alert origination operation is supported through an intuitively designed Web page. Encoding consists of a simple selection of EAS parameters from pre-built lists, and playout of EAS alerts is accomplished by user-operated GUI controls or GPI inputs.

The system offers several advanced tools for manual alert forwarding, including network-controlled GPI relays and user-programmable front panel audio announcements to provide notification of unacknowledged and pending unforwarded alerts. Additionally, the DASDEC features programmable filters for blocking manual forward, an optional AES audio output channel, third-party AES audio passthrough/override capability, and it interfaces to broadcast digital video CG's.

A turnkey EAS system consisting of an embedded PC in a custom chassis, the compact DASDEC is configured for a standard 19-inch rack mounting in a 2-RU case. The chassis houses three Web browser-tuned radio receivers for EAS monitoring of AM, FM, or NOAA; an internal NTSC full screen character generator; USB and network connections; balanced analog audio EAS override switching; and optional AES alert audio output.

Accessible
Remote operation and status monitoring allow for easy central management of multiple DASDEC platforms
Supports second Ethernet interface via USB-Ethernet adapter or PCI
Connectable
Wide variety of character generator support: Utah Sci SqueezeMax, Evertz, Harris Iconstation, Chyron CODI, Miranda, XBOB4, Sage Generic, Sage Newsroom, TFT Standard, NDU/ACM, VDS 830/840/Starmu, Envoy, and others.
Configurable, automatic E-mail notifications upon alert origination, decode, forward, or test.
Three built-in, browser-tuned radio receivers for EAS monitoring of AM, FM, or NOAA.
NTSC video output channel.
Secure
Supports SSL-based https-password-protected login
Permissions for multiple users with configurable access
SSH-based data transfer
Internal firewall
Reliable
LINUX OS - LINUX dependability
DASDEC software supports automatic restart for fully unattended operation
Digital
Supports EAS NET digital network alert forwarding with streaming audio
CAP network alert compatible (in development)
Supports standards DVS-644 (SCTE-18) digital EAS for Cable and DVS 168 (SA EARS)
All decoded EAS audio captured as digital .WAV files for digital forwarding and review/playback over a LAN
Optional support for MPEG2 and MPEG4 video/audio encoding and IP streaming
Optional support for AES/EBU audio output of alerts
Economical
Embedded PC design and software decoding minimizes custom hardware costs
Maintainable
Upgrades and mandated changes are easily downloaded and installed in the field via the Web
Expandable
USB ports and standard PCI slots for expansion hardware
Expanded interface controls for a wide range of EAS-associated peripheral equipment
Precise
Network Time Protocol (NTP) supports clock synchronization to external server and the NOAA atomic clock
Compact
Can be operated headless (over a LAN) without monitor or keyboard
2 RU 19 inches wide, 14 inches deep
150 watts - 120VAC - 60Hz
Compliant
FCC Certified
FCC ID: RV8DASDEC-1EN
Robust
Modular hardware design makes any repairs easy
Modular software design allows safe and easy upgrades
Expansive
Holds tens of thousands of EAS events for simple access, review, replay, and print

 

 

We chose the DASDEC because it was the only encoder/decoder that provides a digital and audio output channel to send EAS alerts through our digital system. Additionally, the DASDEC is easy to configure via a Web page, and the service organization behind the product has been tremendous.

Ted Poe
Chief Engineer
IdahoPTV


LITERATURE

Trifold brochure of the DASDEC (PDF 255KB).

'The DASDEC BLOCK diagram' (PDF 94KB).

'Walk Around the BLOCK diagram - A glossary'; terms used in the DASDEC Block diagram (PDF 65KB).

PDF files require Adobe Reader


Link to APPLICATION NOTES

Link to HARDWARE NOTES