Public safety receivers are built to perform in the harshest environments. Physically they appear to be up to any challenge. Some even work under water. Unfortunately, it is not easy to see how they will perform in a harsh RF environment. Narrowbanding moves adjacent channel performance to a new level. New spectrum allocations push public safety radios up in frequency near 3G and 4G transmissions. This white paper discusses the common test procedures for analog and
digital receivers and proposes new procedures that can better predict
digital receiver performance under the emerging narrowband spectrum
allocations.