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8
OTHER FUNCTIONS
About "USB SEND/Keying"
You can control transmit, receive, and CW/RTTY
keying from the PC through the USB port�
Select the control port to be used for communication
between the transceiver and PC in "USB SEND,"
"USB Keying (CW)," and "USB Keying (RTTY)"
according to your operating needs�
» SET > Connectors > USB SEND/Keying
The IC-905 has two virtual COM ports, A and B�
The transmit and receive control (USB SEND), CW
Keying, or RTTY (FSK) Keying signals from the PC are
assigned to the DTR/RTS terminals in the virtual port�
L When connecting to a USB port on your PC that is
installed the USB driver, USB (A) and USB (B) are named
IC-905 Serial Port A (CI-V)" and "IC-905 Serial Port B�"
USB SEND
USB Keying (CW)
USB Keying (RTTY)
• OFF:
Turns OFF the function�
• USB (A) DTR: Uses the DTR terminal on USB (A)�
• USB (A) RTS: Uses the RTS terminal on USB (A)�
• USB (B) DTR: Uses the DTR terminal on USB (B)�
• USB (B) RTS: Uses the RTS terminal on USB (B)�
CPU
USB SEND
USB Keying
(CW)
USB Keying
(RTTY)
TIP: About the "USB SEND/Keying" items
• When you operate RTTY or CW through your PC's USB
port and your IC-905, you may not be able to send the
"SEND" or "Keying" signals until a few seconds after
you connect the USB cable�
• When you operate through your PC's USB port and the
IC-905, and connect a second transceiver to another PC
USB port, a short "SEND" or "Keying" signal will be sent
from the first transceiver. Therefore, we recommend that
you do not connect a second transceiver to a USB port
of the same PC� Or, always turn OFF the transceiver
power before you connect a USB cable�
(Default: OFF)
(Default: OFF)
(Default: OFF)
TXD
IC-905
Serial Port A
RXD
(CI-V)
Virtual
RTS
COM
port A
DTR
TXD
[USB] port
RXD
Virtual
RTS
COM
IC-905
port B
Serial Port B
DTR
Protection function
The transceiver has a 2 step protection function to
protect the final power amplifiers in case the antenna
SWR becomes high�
The function detects the power amplifier temperature
and activates when the temperature becomes too
high�
Power down transmission
Reduces the transmission output power�
• "LMT" is displayed while transmitting�
TX inhibit
Disables the transmitter�
•
(Grayed out) is displayed instead of
transmitter is disabled�
NOTE: If the function is activated, wait until the
power amplifier cools down by using the transceiver
only to receive�
• You can check the power amplifier temperature with the
TEMP gauge in the Multi-function meter�
8-2
while the
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