Drive Output (Drv); Turning On/Off Drive Output; Adjusting The Drive Output Level; Built-In Antenna Tuner - Kenwood TS-890S Instruction Manual

Drive Output (DRV)

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 DRV Connector
(View from Rear Panel)
Connect Using a
2
4 5
LKY
1 3 Coaxial Cable
6 7
ALC
Output Power at
GND Approx. 1 mw (0 dBm)
.

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/
SSB-DATA/FM-DATA
70M
(E Type)
AM/AM-DATA
Linear Amplifier
(Typical Input at 1 mW)
AMP
TX
Detection
(Transmission)
Circuit
Control Voltage
+12V ALC Voltage
Setting Value Default
5 to 100 [%] (1 step or
100
multiples of 5)
5 to 25 [%] (1 step or
25
multiples of 5)
5 to 100 [%] (1 step or
100
multiples of 5)
5 to 25 [%] (1 step or
25
multiples of 5)
5 to 100 [%] (1 step or
100
multiples of 5)
5 to 25 [%] (1 step or
25
multiples of 5)

Built-in Antenna Tuner

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 <<
[AT] LED become lit in solid light. <<
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, <<
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.
BASIC OPERATIONS 4
>> and
>> blinks when the
>> will
>>
4-11