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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.
.
TS-890S
TL-922
2
4
1
67
3
5
ALC
GND
RL CONT
GND
COM
MKE
REMOTE Connector
(View from Rear Panel)
7-pin DIN Plug
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.
.
TS-890S
2
4
1
67
3
5
ALC
GND
(RX)
(TX)
COM
BRK
LKY
MKE
10Ȑ
10Ȑ
ON during Active Low/transmission: “L”
ON during Active High/transmission: 12 V
REMOTE Connector
(View from Rear Panel)
Linear Amplifier
(Commercially
Available)
7-pin DIN Plug
Connect to either ANT 1 or 2.
AC100~240V
50/60Hz
GND
RF INPUT
RF OUT
ALC
TX
Control
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
16-13
171


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