There are two audio DSP audio paths on the All Road.  One is for receiver audio (RX).  The second is for to transmit microphone audio (TX).   

Receiver DSP adjustment guidelines: 

  1. Start with “RX NR” level set to 01 (default).  If the background audio noise level is still too high, then consider stepping up the level to 02 and check again by listening. 

  1. If the receiving station has a weak signal level and the voice sounds unintelligible, try reducing the RX NR level.  If the level is set to 01 and the voice of the receiving station is still too distorted or is uncomfortable to listen to, then try turning OFF RX NR.  Very weak stations are more challenging to the DSP algorithm to process effectively.


Transmitter DSP adjustment guidelines: 

  1. TX NR or transmitter microphone DSP is meant for the benefit of the station that’s receiving the All Road transmissions.  If the All Road is operated in a very high noise environment, then TX NR level 05 is recommended.  This will provide the highest-level microphone audio signal to noise processing.  This means the background noise is greatly reduced, which in turn enhances the operator's voice and will improve the receiving station’s ability to clearly hear the All Road operator.  

  2. Radio’s that lack this powerful DSP technology will have greatly reduced intelligibility of the radio operator's voice, diminishing the effectiveness of two-way radio communications. 

  1. In a very quiet operating environment like a home base station, there will be little benefit to using the DSP processing.  TX NR level 01 or turning OFF are operating considerations.