You will also be able to distinguish stronger and weaker signals based on the color differentiation. You can tune and move quickly to the right signal as you listen with the real-time option on the FT-991A. On the contrary, the FT-991 does not have this in real-time, but it’s more of a “snapshot” version that makes it tougher for you to listen and tune at the same time. This allows you to view the location of the incoming signal on the band graphically.
However, the only difference between these two devices is the real-time spectrum scope offered by the FT-991a. They also both possess a spectrum scope with an automatic scope control that’s built right into the device.
