B. Application example
C. Channel and Digital tube display
Power on
，
press the “CH” button to change channel
，
“CH” digital display will change
synchronously
，
“CH” digital display changes cyclically from 1 to 8.
D. Frequent and Digital tube display
Power on
，
press the “FR” button to change frequency band
，
“FR” digital display will change
synchronously
，
“FR” digital display changes cyclically from 1 to 4.
FR1 for A band
，
FR2 for B band
，
FR3 for E band
，
FR4 for F band(Airwave band).
