The General Dynamics R2660D offers the unique capability to test iDEN systems under actual TDMA operating conditions in either 6:1 or 3:1 format. Comprehensive diagnostic capabilities are provided to facilitate fault isolation and repair. In addition, the R2660D also provides dedicated screen displays for convenient observation or printout; innovative use of soft keys and windowing; fast reacting autoranging scales with both analog and digital readouts; and signaling encode and decode functions - all built into a versatile, rugged, and compact test unit designed specifically to meet the tough demands of the field service environment.