4 DSP
Figure 4-3 Control Block Diagram of IF-AGC
In the attack control circuit, in addition to the normal fast gain shift function, we have added a technology to capture the signal transformation in an overshoot form and to apply moderate gain to the signal in order to lessen the audible clicks. As an example, Figure 4-4 provides a comparison between the audio waveform of a CW signal controlled by the conventional AGC attack control and by the AGC attack control of the TS-590S.
Figure 4-4 CW Receive Waveforms: Comparing Conventional and TS-590S’s Attack Control
The receive audio quality of the TS-590S has been highly evaluated since its launch, and this level of quality has not been achieved only by the audio characteristics and hardware elements such as the speaker, but also the digital AGC control characteristics realized by the latest technologies have also substantially contributed.
Even now the IF-AGC continues to be examined and enhanced daily for further improvements of the receive audio quality.
