Kenwood TS-890S Operation Manual - Page 55

BASIC OPERATIONS 4 Drive Output (DRV) Built-in Antenna Tuner The allowable output frequency ranges from the drive output (DRV) are the 135 kHz band (135.700 kHz to 137.799 kHz), 475 kHz band (472.000 kHz to 478.999 kHz) and the amateur bands between 1.9 and 50/70 MHz. The output impedance is 50 Ω and output level is approximately 1 mW (0 dBm). REMOTE Connector (View from Rear Panel) 2 LKY 4 5 1 3 6 7 ALC GND DRV Connector Linear Amplifier (Typical Input at 1 mW) Connect Using a Coaxial Cable Output Power at Approx. 1 mw (0 dBm) AMP Detection Circuit Control Voltage TX (Transmission) +12V ALC Voltage . Turning ON/OFF Drive Output Press [DRV]. Pressing [DRV] each time toggles drive output between ON and OFF. • When drive output is ON, the [DRV] LED lights up in green. • During output from the DRV terminal, TX signals will not be output from the ANT 1 and ANT 2 connectors. • Transmission from the DRV terminal will not be displayed on the PWR meter. ALC (automatic level control) can be operated by inputting ALC voltage from an external device to the ALC terminal of the REMOTE connector. The operating status will be displayed on the meter in this case. The DRV output level is not controlled when there is no ALC voltage input. As such, the output level is determined according to the MIC input or [CAR] control settings. ● Pay careful attention to the connection when making use of drive output as described above. Adjusting the Drive Output Level Turn the [POWER] control. "nnn%" is displayed according to the selected drive output level. [nnn: 5 to 100] • A different drive output level can be configured for the AM and modes other than the AM mode. • The resolution [1% / 5%] for changing the drive output level can be switched using the Menu 6-04 "Transmit Power Step Size" setting. Band/Mode CW/FSK/PSK/SSB/FM/ SSB-DATA/FM-DATA HF AM/AM-DATA CW/FSK/PSK/SSB/FM/ SSB-DATA/FM-DATA 50M AM/AM-DATA CW/FSK/PSK/SSB/FM/ 70M SSB-DATA/FM-DATA (E Type) AM/AM-DATA Setting Value Default 5 to 100 [%] (1 step or multiples of 5) 100 5 to 25 [%] (1 step or multiples of 5) 25 5 to 100 [%] (1 step or multiples of 5) 100 5 to 25 [%] (1 step or multiples of 5) 25 5 to 100 [%] (1 step or multiples of 5) 100 5 to 25 [%] (1 step or multiples of 5) 25 It is important to ensure that the impedance of the coaxial cable and that of the antenna coincide with each other. An external antenna tuner or the built-in antenna tuner is used to adjust the impedance between the antenna and this transceiver. Impedance Matching with the Antenna 1 Select a TX frequency. 2 Press and hold F [ANT/PRE] to select an antenna. • When an external antenna tuner is connected to the ANT 1 connector, select ANT 2 if the built-in antenna tuner is to be used. • The built-in antenna tuner cannot be used with ANT 1 when it is connected to an external antenna tuner. 3 Press and hold [AT] to perform tuning. • The transceiver switches to the CW mode and starts tuning. TX output power is automatically configured to 10 W and the SWR meter will be selected as the TX meter. • > and [AT] LED will start to blink. > blinks when the antenna tuner is ON during reception. • To undo the tuning, press [AT] again. • If the SWR (standing wave ratio) of the antenna is extremely high (10:1 and above), an alarm tone ("SWR" in the Morse code) will be output, and the built-in antenna tuner will be disabled. • Adjust the antenna to lower the SWR before restarting the tuning operation. 4 Check to ensure that tuning is complete. • When tuning is completed successfully, a Morse code tone "T" is output. • When tuning is complete, the blinking > and [AT] LED become lit in solid light. > blinks when the antenna tuner is ON during reception. • If matching is not achieved for a duration of 20 seconds, an alarm tone will be output (continuous output of "5" in the Morse code). When this occurs, check the SWR meter and press [AT] to stop tuning when the SWR value is low. ● Tuning of the built-in antenna tuner will not be performed outside the permitted TX frequency range. ● During transmission, pressing and holding [AT] starts the tuning. ● If matching is not achieved for a duration of 60 seconds, tuning will end automatically. When this occurs, the antenna tuner circuit turns OFF, > will disappear, and the [AT] LED will go off. ● If tuning does not end automatically even though the SWR of the antenna 3:1 or lower, adjust the antenna system to lower the SWR and try to perform tuning again. ● The SWR may not reach 1:1 even though tuning has ended. 4-11