20x20 Grid Test

NFPA Code Compliant

D.A.Q, or Delivered Audio Quality, is a graded test which assesses the perceived audio quality of the existing in-building emergency radio communications. The result of a D.A.Q test is a categorical ranking, ranging from 1 (worst) to 5 (best). A DAQ result category 1 ranking is categorized as unusable; speech was present but not discernable. A DAQ result category 5 ranking is categorized as perfect; no distortion or discernable noise. NFPA 1221 requires a minimum delivered audio quality of 3.0 or better.

Upon completion of your DAQ survey and RSSI testing, results will be submitted to the local AHJ and FCC license holder. In the event that your local AHJ determines in-building radio frequency coverage does not meet the code requirements, an in-building supplemental emergency responder radio communication enhancement system is required. Please keep in mind that each AHJ has it's own set of unique code requirements, and only your local AHJ may determine whether a BDA/DAS system will be required in your building!

How Does A BDA System Work?

A brief explanation of how a BDA system functions

1. Radio signal arrives from base station tower station to the donor antenna installed on property's roof.

2. Outside signal goes through Bi-directional Amplifier.

3. Enhanced signal sent to area(s) of coverage.

Test criteria is crucial when conducting BDA System testing

RSSI is an acronym for Received Signal Strength Indication. An in-building RSSI test maps the signal strength of a radio signal, typically that of a public safety radio system. The in-building radio signal strength results are then displayed on 20 x 20 grids on top of your building floor plans. Each individual 20 x 20 grid indicates a localized radio signal coverage strength, identifying all in-building public safety coverage deficiency.