Once you have a way to get your two tone audio into the radio, either via injection to the microphone port, or by transmitting an audio file, you can check your linearity. If you have a good double sinusoidal pattern, then you can expect that your transmitter is running in the linear region. Otherwise you can adjust your transmitter, or amplifier and test again.

https://www.youtube.com/watch?v=NapPt2sxBVE

In some cases, you may want to transmit an audio file from your PC on the IC-7300. In this instance, I need to be able to transmit a two tone wav file, to be able to perform a linearity test. This video details what you need to do to be able to build a file that is compatible with the IC-7300.

https://www.youtube.com/watch?v=QsWXcqnrEgk

In one of my previous videos, I covered installing WSJT-X and reconfiguring the radio to talk to WSJT-X. Bob Stothfang in the Icom IC-7300 group on Facebook mentioned that he handles this by using saved settings files on the SD card. This video deals with executing that method. Many thanks to Bob Stothfang.

https://www.youtube.com/watch?v=jvbwBivmTmI

Installing WSJT-X and configuring the software to talk to the Icom IC-7300. Includes information on setting CI-V baud rate, data bits, stop bits, AGC, Noise Blanker, Noise Reducer, and more. Also covers setting sound devices and audio levels.

https://www.youtube.com/watch?v=1iBpNU94Rpo

The first step to using the Icom IC-7300 with software such as RS-BA1, Ham Radio Deluxe, N1MM or others, it to install the Icom USB Driver. I'm using Windows 10, but the process is similar for other versions.

https://www.youtube.com/watch?v=Qg6tjsb40u8

The first step to using the Icom IC-7300 with software such as RS-BA1, Ham Radio Deluxe, N1MM or others, it to install the Icom USB Driver. I'm using Windows 7, but the process is similar for other versions.

https://www.youtube.com/watch?v=F_DOcUCQIxI

An introductory video covering the MFJ-993 Intellituner. This small automatic tuner covers 1.8MHz to 30MHz at up to 300 watts. Capable of tuning up to a 32:1 mismatch at full power, or up to 64:1 at 150 watts. The tuner has two switchable antenna jacks, and a 4:1 current BALUN.

https://www.youtube.com/watch?v=LUCreYx94UM