Icom IC-7200 Manual de usuario
Icom IC-7200 Audio via USB
Andrew – VK3CAH, June 2014
Having volunteered to provide the monthly RAOTC broadcast on fill in basis when the
regular amateur broadcast station was unable to provide this service, I explored how to
play an mp3 file into my Icom IC-7200
Previously, I had successfully devised a way to use my trusty old FT-7, (with linear
amplifier) to conduct the broadcast, however, I wanted a backup system.
There are three different methods of providing transmit audio into to a IC-7200.
•Front panel Microphone socket
•Rear Panel Auxiliary connector
•Rear panel USB connector
The front panel microphone option is the immediate option, but untidy. There an 8 volt
supply on the microphone lead, and there is always the risk of shorting it out. This led
me to explore what can be achieved with the USB input. This has the advantage in that
you don’t have to worry about hum or rf getting into the audio chain.
The USB option is probably the simplest of them all.
Before connecting the radio to the computer, you need to download the USB driver
from Icom. Icom make very specific instructions as to what order to install the driver,
and connect the radio to the PC. In my case, I use Win7, and thus need to install the
driver firstr before connecting the radio.
•Go to http://www.icom.co.jp/world/support/index.html
•Select Support
•Firmware Updates & Software Downloads
•Scroll down the page to find the USB driver for the IC-7100, IC-7200, IC-7410,
IC-7600 &IC-9100.
You’ll notice that there are actually 3 different drivers to choose from.
•Version 1.00 is for Win2K/XP/Vista
•Version 1.1 is USB 2.0 for windows 7
•Version 1.2 is USB 3 for windows 7 / 8
After downloading and installing the driver, I connect the computer and the IC-7200
appears as a USB sound card to the PC. A USB interface and a sound chip being in the
radio, the PC thinks it has an additional sound card.
In addition, Ham Radio Deluxe talks quite nicely to the IC-7200 via the USB interface.
You no longer need the CI-V interface cable, so it can be removed (and sold off at vast
profit at the next ham fest.)
Playing PC audio over USB to the IC-7200
There are two things you need to do
•Ensure the default sound card in Windows is the USB sound card
•Set the IC-7200 to accept USB audio
On the PC, (Windows 7), go to Start, Control Panel, and select Sound. All the sound
devices are right there. If it is not already done so, select the USB sound card and select
the default button. When you’re finished, you’ll have to reset the default sound card,
otherwise you won’t get any sound out of the PC.
To set the IC-7200 to accept USB audio, you need to enter the Set Mode function.
From the Icom manual -:
You then need to select the modulation input, and you may need to adjust the audio
level. It’s really as simple as that.
Keyline. There is no front panel Keyline. Two options are available. You can use the
PTT switch on your desk microphone and there is a TX button in Ham Radio Deluxe.
After the broadcast has finished, and you’re ready for call-backs, simply push the Set
button TWICE for one second each time, a slight rotate of the DIAL, and press the Set
button briefly, to revert to microphone audio.
Sidetone. At this point, as far as I know, there is no way to get a side tone from the
radio or the PC when the broadcast file is playing, so I use my Degen DE-1103 Chinese
shortwave radio to monitor audio output. You need to remember to turn the radio off
before activating the microphone, as you’ll otherwise get audio feedback.
de VK3CAH
14/6/14
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6
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