Field Report: Deva Broadcast DB44


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The status tab shows the alarm results of each parameter of the preset frequencies, along with the basic device and network status (IP address, MAC, etc.)

Alarms can be customized on a per-preset basis under the settings tab. Each preset has its own page where the preset is programmed, named and a monitoring time frame is set. Measurement windows can be set for each of six parameters: RF level, left and right audio level, MPX (baseband) deviation, pilot and RDS deviation. Each alarm parameter can be set with minimum trigger and alarm release times. The IP port settings for the embedded Web pages is set at 80 but can be changed. It is the same with the streaming audio port.

The email settings provide for two send-to email addresses and even allow the use of an alternate SMTP port and an authenticated SMTP server login. All relevant SNMP parameters can be set on this page, as well (although the MIB file is downloaded elsewhere). Other global settings like RF attenuator setting, de-emphasis, date/time (automatic Internet time sync is default) and device timeouts are set on a separate management page.

Although being far removed from U.S. time zones, the company has been exceptionally responsive to the email questions I had. Needless to say the unit firmware is field upgradable over the IP connection.

While this is an incredible tool, especially for the price, I mentioned some possible improvements to Deva. I am told many of these ideas will be implemented in the next firmware update, which I noted below.

◊ RDS/RBDS was a global setting. The RDS mode setting will be on the same [settings][management] screen as de-emphasis, and the screen real estate on the dashboard will be indicators for de-emphasis and RDS modes.

◊ RDS/RBDS was a global setting. The RDS mode setting will be on the same [settings][management] screen as de-emphasis, and the screen real estate on the dashboard will be indicators for de-emphasis and RDS modes.
◊ The unit now supports RadioText+, which my unit did not.
◊ A Lissajous option for the scope page will be added.
◊ The bandscan and device log results can be now be exported.
◊ The streaming function is excellent but I would love to see the listen function work on mobile devices as well.

Deva Broadcast
◊ +359 56 820027
www.devabroadcast.com
info@devabroadcast.com

Of course, we have to consider HD Radio monitoring. As we are reaching critical mass for HD Radio deployment, the need for inexpensive remote monitoring of HD Radio parameters such as RF mask compliance is needed. Adding HD Radio is undoubtedly a challenge, but eventually we will all need it.

For FM monitoring situations where the expensive, full-fledged system is not needed or where cost is a limiting concern, the Deva Broadcast DB44 is a good monitoring solution. It is remarkably simple to drive and understand and it can be accessible using any Web browser over an Internet connection.


Thomas is vice president of engineering, Lincoln Financial Media, Atlanta.


- See screenshots of the unit on the next page



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