Controlling The Linear Amplifier; Tl-922 Connection; General Linear Amplifier Connection - Kenwood TS-890S Instruction Manual

Controlling the Linear Amplifier

This section describes the procedures for configuring the control
signal and TX/RX delay when using a linear amplifier.
Outputs of the mechanical relay (MKE, BRK, COM) and
semiconductor switch (RL) are output to the REMOTE connector
on the rear panel, which allows users to combine the use of this
transceiver with their linear amplifier.
The control signal status and whether to enable TX delay time can
be configured on the menu screen.
HF band, 50 MHz band and 70 MHz band (E type only) can be
configured separately.
Connection
• Use the supplied 7-pin DIN plug to make your own connection
cable.

TL-922 Connection

Connect terminal no. 2 (COM) of the REMOTE connector to GND
of TL-922, and terminal no.4 (MKE) of the REMOTE connector to
RL CONT of TL-922. Connect terminal No. 6 (ALC) of the
REMOTE connector to ALC OUT of TL-922.
GND COM
RL CONT
MKE 2
4 5
1 3
6 7
ALC
GND
.
TS-890S
7-pin DIN Plug
TL-922
REMOTE Connector
(View from Rear Panel)

General Linear Amplifier Connection

Follow the diagram below to connect a commercially available
linear amplifier.
• The ALC circuit of this transceiver starts to operate from an ALC
output voltage of approximately -4 V (which can be changed
from the Linear Amplifier menu) from the linear amplifier. To
enhance the stability of the output and ALC operation, it is
recommended that the TX output power limiter function be
configured.
• For more details on connection with a linear amplifier, please
refer to the instruction manual of the linear amplifier to be used.
Connect to either ANT 1 or 2.
(RX)
COM
(TX)
MKE
4
1
6
ALC
10
ON during Active High/transmission: 12 V
ON during Active Low/transmission: "L"
.
The method for controlling linear amplifiers varies with
●
the type of linear amplifier in use. There are some linear
amplifiers that place this transceiver in the TX mode once
the control terminal is connected to GND. When using
such types of linear amplifiers, connect terminal no. 2
(COM) of the REMOTE connector to GND of the linear
amplifier, and terminal no. 4 (MKE) of the REMOTE
connector to the control terminal of the linear amplifier.
OTHER FUNCTIONS 16
TS-890S
7-pin DIN Plug
Linear Amplifier
(Commercially
Available)
RF INPUT
TX
GND
ALC
Control
REMOTE Connector
BRK
(View from Rear Panel)
2
5
3
7
LKY
GND
RF OUT
AC100˜240V
50/60Hz
16-13