Kenwood TS-990S Operation Manual - Page 77

Configuring The Number Of Antenna Connectors, Rx Antenna, Drive Output (drv), Connectors

Page 77 highlights

CONFIGURING THE NUMBER OF ANTENNA CONNECTORS Follow the procedures below to configure the antenna connectors that are selectable using [ANT] (F). If two antennas are installed, connect to ANT1 and ANT2 and configure the number of antenna connectors to "2". This will eliminate unnecessary switching to ANT3 and ANT4. 1 Select Group No. 7, "Rear Connectors", from the Menu screen. 2 Access Menu 19, "Antenna Numbers". 3 Press [SELECT] (F4) to allow editing of the parameter box. 4 Press [-] (F4) or [+] (F5), or rotate the MULTI/CH control to select the number of antenna connectors. Select from "1" to "4". The default is "4". 5 Press [ ] (F1). 6 Press [MENU] to exit. RX ANTENNA You can select an antenna to be dedicated for reception. To operate the transceiver with an antenna dedicated for reception, such as an HF low band Beverage antenna or a directional loop antenna, you must connect the antenna to the RX IN connector on the rear panel. You can insert a homemade or commercially available BPF, trap filter, etc. between the RN IN connector and the RX OUT connector.

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BASIC OPERATIONS 4
4-23
Index
Contents
CONFIGURING THE NUMBER OF ANTENNA
CONNECTORS
Follow the procedures below to configure the antenna
connectors that are selectable using
[ANT]
(F).
If two antennas are installed, connect to ANT1 and ANT2
and configure the number of antenna connectors to “2”.
This will eliminate unnecessary switching to ANT3 and
ANT4.
1
Select Group No. 7, “Rear Connectors”, from the
Menu
screen.
2
Access Menu 19, “Antenna Numbers”.
3
Press
[SELECT]
(F4) to allow editing of the parameter
box.
4
Press
[-]
(F4) or
[+]
(F5), or rotate the
MULTI/CH
control to select the number of antenna connectors.
Select from “1” to “4”. The default is “4”.
5
Press
[
]
(F1).
6
Press
[MENU]
to exit.
RX ANTENNA
You can select an antenna to be dedicated for reception.
To operate the transceiver with an antenna dedicated for
reception, such as an HF low band Beverage antenna or
a directional loop antenna, you must connect the antenna
to the
RX IN
connector on the rear panel. You can insert a
homemade or commercially available BPF, trap filter, etc.
between the RN IN connector and the RX OUT connector.
[RX ANT]
1
Press
[RX ANT]
.
Each key press toggles the antenna for the selected
operating band between active and inactive.
While active, "RX" appears on the main screen.
If the same antenna (ANT1 to ANT4) is configured for the
main band and sub band, the RX antenna for the deselected
band is also changed. RX ANT settings, if any, made for non-
operating bands will be disabled when the RX ANT settings
are made for the target operating band, provided that the
antenna for the main band is different from that for the sub
band.
DRIVE OUTPUT ±DRV²
The frequency ranges that can be output from the
Drive (DRV) jack are 135 kHz (135.700 kHz to
137.799 kHz) and the 1.9 to 50 MHz amateur bands.
The output level is approximately 1 mW (0 dBm).
$
*
#
+
,
-
.
RL
ALC
GND
TX
+12V
AMP
ALC Voltage
Control Voltage
Detection
Circuit
Linear Amplifier (Typical Input 1 m W)
REMOTE connector
(Viewed from the rear panel side)
Connection with a
Coaxial Cable
Output Power
1 mW (0 dBm)
1
Press
[DRV]
.
The "DRIVE" LED lights green.
If the transmit signal is sent from the DRV connector,
no signal can be transmitted from the
ANT1
to
ANT4
connectors.
Following the configuration in Advanced Menus 11 (Linear
Amplifier Control (HF Band)) and 12 (Linear Amplifier
Control (50 MHz Band)), +12 V is sent from pin 7 (RL) of
the
REMOTE
connector.
The PWR meter is inactive while transmitting from the DRV
connector. The automatic level control (ALC) circuit will
operate if the ALC voltage input from external equipment
is applied to the ALC pin of the REMOTE connector. In
that case, the ALC meter will indicate the operating status.
The DRV output level will be in control only if the ALC
voltage input is applied. Therefore, the output level will be
determined according to the MIC input or the
CAR
control
setting. Furthermore, you can turn the
[PWR]
control to
reduce the output.
Note:
Be sure that the connection for use with the drive output is in place,
as described above.