Page 26
F
T-991
OperaTing Manual
rear panel
USB Jack
Connect a computer with a commercially available
USB cable to control the transceiver remotely from
the computer using the CAT command.
Inputting/Outputting audio signals and transmission
control can also be done from the computer.
note:
To control the transceiver remotely from the
computer, a USB driver is required. For details
on the USB driver, visit the Yaesu WDXC web-
site.
When using a USB cable connected to a com-
puter, the transceiver may change to the transmit
mode when the computer is started.
EXT SPKR Jack
This is the monaural jack to connect an external
speaker (4 Ω to 8 Ω).
Connecting an external speaker to this jack will de-
activate the internal speaker.
SIGNAL GND
REM/ALC Jack
Connect the optional remote control keypad “
FH-2
”.
When a device such as a linear amplier is connect-
ed, this is an external ALC current input jack.
ANT Jack (HF/50MHz)
This is the M-type coaxial connector to connect HF
band and 50 MHz band antennas (50 ohms).
Cooling fan
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