[演習3-1] 固定中心周波数を変動化して表示する
Variable -> ID: center_freq, Value: center_freq_val
QT GUI Range -> ID: center_freq_val, Lavel: center_freq
Type: Float, Default Value: 144.660e6
Start: 144e6, Stop: 146e6, Step: 100
RTL-SDR Source -> Sample Rate: samp_rate
Frequency: int(center_freq)
QT GUI Sink -> Center Frequency: 144.660e6
Bandwidth: samp_rate
File -> Save As -> Name: sutudy_3_0.grc -> Save