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2 TRANSMISSION
TS-590S CONTENTS 15
TS-590S is equipped with a DRV terminal that formerly was provided only for high-end transceivers.
The output level of the DRV terminal is about 0 dBm (1 mW) and can be decreased to around 1/20
depending on the setting of the transmit power. To reduce the output level further, you can adjust the
transmit power also by the carrier level in CW, FSK and AM modes or by the microphone gain or
processor output level in SSB mode. The output level of the signal from the terminal is too low to be
transmitted as is, but by connecting a high-gain linear amplifier, the signal can be used for operation
in the 135 kHz band or for operation with a transverter. Figure 2-5 through Figure 2-7 show the
spurious characteristics when using the signal from the DRV terminal in the 14 MHz band and Figure
2-8 through Figure 2-10 show the spurious characteristics in the 135 kHz band. If the output level is
0 dBm in the 135 kHz band, the harmonics increase slightly; therefore, you need to place an LPF
after the amplifier or in some other way eliminate the harmonics. Also, lowering the setting of the
transmit output level or limiting the output level at the DRV terminal by entering the ALC signal will
also contribute to reduce distortion.
Figure 2-5 Output Characteristics of DRV Terminal at 14.175 MHz and 0 dBm
2.4 DRV Terminal
21


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