Signal measuring device and method

A signal measuring device measures a transmission timing of a signal from a mobile terminal which performs communication by the time division/synchronization/code division multiplex method and displays the measurement result in a graph. The device includes: a transmission unit (13) which transmits to a mobile terminal (20) to be measured, a timing control instruction for controlling the transmission timing of the mobile terminal (20); a measuring unit (16) which measures the transmission timing of the signal from the mobile terminal (20) transmitted in accordance with the timing control instruction; and a display control unit (18) which displays on a display unit (19), a graph containing the transmission timings measured by the measuring unit (16) which are time-sequentially arranged and a judgment result obtained by a judgment unit (17).