Kenwood TS-590S manual DSP-basedAuxiliary Circuits for TX, Speech Processor AF Processing, 4 DSP

4 DSP

Target signal

Figure 4-19 NR2: Active

4.7 DSP-based Auxiliary Circuits (for TX)

4.7.1 Speech Processor (AF Processing)

TS-590S also incorporates an AF-type speech processor. Though it is an AF type, the speech processor provides sufficient compression through a unique signal processing technique.

A typical voice signal tends to have the highest amplitude in the low frequency range with smaller amplitude as the frequency range increases. That is the reason why distortion is likely to occur in the low range while excessive compression processing is used. On the TS-590S, signal processing is conducted to reduce the difference in amplitude between the low and high range when compression is performed. As a result, the speech processor can raise the talk power while minimizing rasping distorted sounds.

Besides, since the relatively emphasized high range has an effect of raising the intelligibility of the voice, the speech processor has now become an effective feature to receive a reply in a pileup.

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Figure 4-20 Speech Processor (Active/Inactive)

CONTENTS TS-590S