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2 TRANSMISSION
TS-590S CONTENTS 13
TS-590S has a built-in high-speed relay-controlled antenna tuner that was first employed in the
TS-570S. In contrast to the variable capacitor type antenna tuner, it employs a small and lightweight
relay to achieve a sufficient matching range and a fast tuning operation with digital control. The
control speed has been further accelerated over previous models. When you return to a previously
used operating band or frequency, the antenna tuner easily and quickly re-tunes.
The transceiver has a REMOTE connector that has the same pin assignment and specifications as
on previous models.
Pin 6 is the ALC terminal. When you use a linear amplifier or transverter, we recommend you
connect the external accessory device to the ALC terminal in order to control the output to be within
an appropriate range.
The ALC signal is a signal to shift the voltage in the minus direction (in Kenwood’s devices) when the
output level requires regulation to satisfy the requirements of the external accessory device.
Generally external accessory devices have a VR for adjusting the voltage. In the TS-590S, a
negative voltage (approximately -10 V) is applied to the ALC terminal to decrease the internal gain.
As well, for the purpose of controlling a linear amplifier and other external device, the transceiver is
equipped with a relay output terminal and an RL terminal (Pin 7) to which an approximately 12 V
voltage is output. The relay output and RL terminal output are coordinated with internal controls and
can be adjusted in the linear amplifier control setting menu No. 53 (HF bands) or No. 54 (50 MHz band).
Table 2-1 describes the possible settings of the menu, and Figure 2-3 and Figure 2-4 provide the timing
charts.
If using equipment that is not designed for full break-in and requires a delay for internal switchover,
such as TL-922, select “3”. In this way, you can increase the delay between the case when the
transceiver is switched to transmit and the case when the signal is actually sent out. Note; however,
if the full break-in setting is selected in CW mode (and if the delay time is set to “FBK”), the transmit
start time cannot be delayed.
Table 2-1 Setting Menu of Linear Amplifier Control
2.2 High-speed Relay-controlled Antenna Tuner
2.3 REMOTE Connector
Linear Amplifier Controls
Setting
Control of Linear
Amplifier (RL terminal)
Control of Relay (COM/
BRK/MKE terminals)
Transmit Start Delay Time
OFF OFF OFF 10 ms
1ONOFF10 ms
2ONON10 ms
3ONON25 ms