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Antenna system and setting of “50 ohm BK
The “50 ohm BK” setting may be changed according to the antenna system. Examples are
shown below, including the antenna BK relay and RX DIV kit described on Chapter 4.
When using the antenna connected to ATU for the receiving, the TX/RX matching circuit is
tuned with the transmitting frequency when tuning.
Antenna system-1, duplex
“50 ohm BK” setting: Disable
ATU
COMB
PAx4
RX FIL
RX
R. ANT
TR ANT
WR-1
WR-2
FAX-5 + 2.6m Whip
FAX-5 + 2.6m Whip
ARD-1
WR2 ANT WR1 ANT
J1:TX ANT
J1:RX IN
J1:RX IN
J2:RX OUT
J3:RX OUT
J2:TX IN
J2:ANT
J2:ANT
6m Whip
AT-xxx
FS-5070T
TRX
TX FIL
LPF
50
BK
K15: Set to TX.
TX
RX
Antenna system-2, semi-duplex
“50 ohm BK” setting: Enable
ATU
COMB
PAx4
RX FIL
RX
R. ANT
TR ANT
WR-1
WR-2
FAX-5 + 2.6m Whip
FAX-5 + 2.6m Whip
WR2 ANT WR1 ANT
J1:TX ANT
J1:RX IN
J1:RX IN
J2:RX OUT
J3:RX OUT
J2:TX IN
J2:ANT
J2:ANT
AT-xxx
FS-5070T
TRX
TX FIL
LPF
50
BK
K15: Switch TX and RX.
Attach the optional harness L-600.
RX
TX