Version 1.0
March 2016
Reference MANUAL
Tips for the USB port settings
RMX-USB_PORT_SETTING-ENG-V1.0
TIPS FOR THE USB PORT SETTINGS
PREFACE
Until recently, it has been necessary to change your PC data output to fit your transceiver’s specifications
when you operate RTTY. This is because the transceiver does not directly accept signals output from the
PC’s COM port. Therefore, you needed to use an interface unit between the transceiver and your PC. The
interface unit adjusted the signals levels or signal format.
Now, certain Icom transceivers have built-in RTTY mode. You can simply operate the modes with only your
Icom transceiver itself. However, some users operate those modes with their PC connected through a USB
cable to synchronize with other software applications.
To connect between your Icom transceiver and PC through a USB cable, you do not need to think of signal
level or signal format, and you do not need an interface unit to connect both units. Therefore, the connection
becomes very simple.
The USB port is used not only for RTTY and logging software operation, but also to remotely control the
transceiver from a PC using the CI-V commands, to enter content into memory and to make settings using
optional Icom cloning software.
This document describes certain USB port settings.
The applicable transceivers described in this document are as follows. (As of March 2016)
• IC-7100
• IC-7300
• IC-7850/IC-7851 (Referred to as the IC-7851)
• IC-9100
Note that a USB driver installation is required to connect the above transceivers to your PC.
The USB driver for Microsoft
http://www.icom.co.jp/world/support/download/firm/
Refer to your transceiver’s instruction manual for details on downloading the USB driver, and refer to the
USB driver installation guide about installing the driver.
This document describes only the concept of PC or network settings. Refer to your PC or software manual,
or contact to their respective support center about the PC, software, or network settings. Please note that
Icom cannot provide support for your PC, software, network or their proper settings
Guide Revisions
Icom reserves the right to make changes to the content of this guide at any time without notice or obligation.
Trademarks/Copyright
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the
United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other
countries. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in
the United States and/or other countries. All other trademarks are the properties of their respective holders.
®
Windows® PC can be downloaded from our website at:
© 2016 Icom Inc.
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TABLE OF CONTENTS
TIPS FOR THE USB PORT SETTINGS
SECTION 1
SECTION 2 ABOUT LINK SETTING FOR BETWEEN USB PORT AND REMOTE JACK ..................... 6
SECTION 3 WHY TWO VIRTUAL COM PORTS ARE RECOGNIZED ON ONE PHYSICAL
ABOUT “DTR” AND “RTS” .................................................................................................. 4
USB PORT ............................................................................................................................. 7
3-1 How to check the internal circuit for each COM port ................................................... 8
3-2 How to change the COM port number ....................................................................... 10
3
TIPS FOR THE USB PORT SETTINGS
SECTION 1 ABOUT “DTR” AND “RTS”
Applicable products: IC-7300, IC-7851 (as of March 2016)
When connecting the above Icom amateur base transceivers to a PC using a USB cable, and operating an
RTTY or logging software application, set either the “DTR” or “RTS” items in the transceiver Set mode
settings of “USB SEND,” “USB Keying (CW),” and “USB Keying (RTTY).”
This section describes how to set these items.
Figure 1-1 Set mode screen for IC-7300 Figure 1-2 Set mode screen for IC-7851
DTR stands for Data Terminal Ready, and RTS stands for
Request To Send. They originated from the RS-232C standard,
which is a unified standard for the control signal line.
The SEND and CW/RTTY keying signals from the PC through the
DTR and RTS terminals of the RS-232C port or the sound card
are applied to the ACC socket on the transceiver. On some
transceivers with an RS-232C port, these signals are directly
applied from the DTR and RTS terminals on the PC’s RS-232C
port through an RS-232C cable.
DTR
GND
RI
CTS
Figure 1-3 RS-232C connector pin
assignment (DB9)
TXD
23
45
9
(Front view)
678
1
TX
Software
operation
Output signals
to the RS-232C
connector
RX
Mark
Space
RTS
DTR
(Used for the transceiver’s
transmit and receive switching.)
*When SEND is assigned to the
RTS, and RTTY keying is assigned
to the DTR terminals.
RXD
DCD
DSR
RTS
4
TIPS FOR THE USB PORT SETTINGS
A
Recent PCs have a USB port instead of an RS-232C port. To
GND
+DAT
allow an easier connection and mutual communication, a USB
port is also built into the transceiver.
With using an RS-232C communication port, signal lines such a s
RTS and DTR are needed to exchange data between the PC and
the transceiver. However, there are no DTR and RTS terminals
on a USB port.
V
BUS
(Front view)
Figure 1-5 USB port pin assignment
–DATA
RTS and DTR terminals of the RS-232C can be found in the
Serial-USB converter as shown in Figure 1-6. The data from the [USB B] port is output to these terminals in
this Serial-USB converter.
SEND
CW Keying
RTTY Keying
CPU
Sets these switches
RXD
TXD
Serial-USB
RTS
Converter
DTR
RS-232C ports of the
Serial-USB Converter
USB
HUB
[USB]
Rear panel
Figure 1-6 Data bus line between CPU and USB
The RTTY/logging software application sets the output terminal, either RTS or DTR, for each SEND and
CW/RTTY keying signal. In other words, the software sets the SEND and CW/RTTY keying signal output
terminal of the Serial-USB Converter inside the transceiver.
On the other hand, the transceiver’s set mode items, "USB SEND," "USB keying (CW)", and "USB keying
(RTTY)," selects either the RTS or DTR port of the Serial-USB Converter to capture SEND, CW/RTTY
keying signal, respectively. (Except "OFF")
Therefore, the settings will succeed when the same terminal is set between the transceiver’s “USB SEND,”
“USB keying (CW),” and “USB keying (RTTY)” and software’s SEND, CW keying, and RTTY keying,
respectively.
Note that the setting item name may differ, depending on the software being used.
For example, “PTT” or “Transmit” may be used instead of “SEND,” “FSK” may be used instead of “RTTY.”
Therefore, properly set these items by also referring to the software manual or help files.
For your information:
The “USB SEND” item is a setting to switch the transceiver’s transmit and receive. So, the terminal must be
set to the same setting as that in the software. If a different terminal or OFF is set in the transceiver’s set
mode, the software cannot toggle between transmit and receive.
Note that the transceiver will transmit when the USB SEND line inside the transceiver’s CPU becomes High.
(The transceiver transmits with the inverted logic from the SEND jack, or SEND line of [ACC].)
5
TIPS FOR THE USB PORT SETTINGS
SECTION 2 ABOUT LINK SETTING FOR BETWEEN USB
PORT AND REMOTE JACK
Applicable products: IC-7300, IC-7851 (as of March 2016)
You can switch USB port and [REMOTE] link ON and OFF in the above Icom’s amateur base transceivers.
In case the transceivers that two COM ports are recognized, the link setting is available for only USB1.
Figure 2-1 Set mode screen for IC-7300 Figure 2-2 Set mode screen for IC-7851
The default setting of this item is “Link to [REMOTE].”
This setting is selected when using the Transceive function by outputting the control signal from [REMOTE]
after converting the communicating data at the USB port to CI-V data, or when operating the existing remote
control system with the optional CT-17. In this case, the USB port communication speed is limited to 19,200
bps because the [REMOTE] jack’s maximum communication speed is 19,200 bps.
Thus, Icom strongly recommends the setting of "Unlink to [REMOTE]" in cases other than those above.
By using “Unlink to [REMOTE],” you can operate the USB port with a speed of up to 115,200 bps.
CPU
CI-V USB Link switch
Serial-USB
Converter
CI-V
Converter
CI-V
Converter
USB
HUB
[REMOTE]
19,200 bps
[USB]
Linked = 19,200 bps
Unlinked = 115,200 bps
Figure 2-3 USB port and [REMOTE]
IMPORTANT: Set to “Unlink to [REMOTE]” when using the spectrum scope function of RS-BA1 with the IC7300, or IC-7851 through a USB cable. Otherwise RS-BA1 spectrum scope will not function since the data
transfer speed of the USB port is insufficient for the amount of data required by the spectrum scope.
6
TIPS FOR THE USB PORT SETTINGS
SECTION 3 WHY TWO VIRTUAL COM PORTS ARE
RECOGNIZED ON ONE PHYSICAL USB PORT
Applicable products: IC-7100, IC-7851, IC-9100 (as of March 2016)
Two COM ports will be recognized when connecting the above transceivers to a PC that the specified USB
driver has been installed on, because two internal circuits are connected through a built-in USB HUB.
Therefore, these two internal circuits have been recognized as two ports on the PC.
For example, the optional RS-BA1 automatically selects USB1 and uses the circuit for remote control. If
RTTY/logging software is assigned to the USB 2’s COM port, both the RS-BA1 and RTTY/logging software
can simultaneously be operated.
PC recognizes the USB 1 COM port.
Serial-USB
Converter
CPU
Serial-USB
Converter
USB
HUB
[USB]
PC recognizes the USB 2 COM port.
Figure 3-1 USB circuit block diagram
Figure 3-2 Device Manager screen
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TIPS FOR THE USB PORT SETTINGS
3-1 How to check the internal circuit for each COM port
You can check the corresponding internal circuit, USB 1 or USB 2, for each COM port in the Device Manager.
(1) Open the Device Manager screen.
• To display the Device Manager screen with Microsoft
- The description may differ according to your OS version or settings. Refer to your PC’s instruction
manual, or help file for details.
1) Click “Start menu” and then “Control Panel.”
2) Click “Hardware and Sound.”
3) Click “Device Manager” in “Device and Printer” group.
• Click the triangle mark for “Ports (COM & LPT)” to display the contents.
(2) Right-click the COM port that you want to check the internal circuit, and select “Properties.”
• The “Silicon Labs CP210x USB to UART Bridge (COM✱) Properties” screen is displayed.
✱ is the COM port number
Click to display the contents
®
Windows® 7 do the steps below.
Right click the port to confirm
Click
8
TIPS FOR THE USB PORT SETTINGS
(3) Click the “Details” tab.
(4) Click “Property” and select the “Device Instance Path” displayed in the drop-down list.
(5) Check the contents displayed in “Value.”
• If the end of the displayed contents is “A,” the COM port is for USB 1.
• If the end of the displayed contents is “B,” the COM port is for USB 2.
Click
Click and select
Confirm the end character
(6) Click <Cancel> to close the “Silicon Labs CP210x USB to UART Bridge (COM✱) Properties” screen.
✱ is the COM port number
9
TIPS FOR THE USB PORT SETTINGS
3-2 How to change the COM port number
You can manually change the COM port number with the following procedures, such as when the
automatically assigned COM port number cannot be selected in your software.
(1) Open the Device Manager screen.
• To display the Device Manager screen with Microsoft
- The description may differ according to your OS version or settings. Refer to your PC’s instruction
manual, or help file for details.
1) Click “Start menu” and then “Control Panel.”
2) Click “Hardware and Sound.”
3) Click “Device Manager” in “Device and Printer” group.
• Click the triangle mark of “Ports (COM & LPT)” to display the contents.
(2) Right-click the COM port that you want to change the COM port number, and select “Properties.”
• The “Silicon Labs CP210x USB to UART Bridge (COM✱) Properties” screen is displayed.
✱ is the COM port number.
®
Windows® 7 do the steps below.
Click to display the contents
Right click the port of the COM port number you want to change.
(3) Click the “Port Settings” tab.
(4) Click <Advanced...>.
• The “Advanced Settings for COM✱” screen is displayed.
✱ is the COM port number.
Click
Click
10
Click
TIPS FOR THE USB PORT SETTINGS
(5) Click “COM Port Number” and select a desired number from the drop-down list.
• The COM port number that has already been assigned to another device on your PC, is marked “in
use.”
Click then select
(6) Click <OK> to set.
• The “Advanced Settings for COM✱" screen closes at the same time.
✱ is the COM port number.
• After changing the COM port number, you may not be able to immediately use the selected COM port
number.
In this case, disconnect the USB cable once, and then reconnect the cable. By reconnecting, you'll be
able to use the selected COM port.
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