EYFR03 User Manual 20 of 110 v1.6.0Chapter 1: Overview 20 January 2020For signal strength, a less negative number indicates a better signal (-50 dBm is better than -60dBM). The screen shows a color based on the quality of the signal. If the tool has notcommunicated with the box recently, box for the tool will have a white background with the textcolored to match the color of the last signal strength received.• Green – The signal from this radio is strong and will work at best performance.• Yellow – The signal from the radio is weaker than recommended for best performance. Theradio should work but may have slower or occasionally interrupted communication with theunit.• Red – The signal from the radio is weaker than recommended for any use. The radio maysuccessfully transmit some results but will frequently have slow or failed communicationwith the unit. If only one tool is red, bring it and unit closer together. If multiple tools arered, consider using a different radio channel (changed from the Qualifier Settings screen).