If you are wanting a PTT Proceed Tone in conventional mode in SJ-180, go to "Edit" - "Optional Features", then select the "Conventional" tab. In the lower left side of the page, there is a box for "PTT Proceed Tone (Conventional)", check the box and you should have it. There is also a "Proceed Tone Delay Time" you can set right there too if needed. If you have a later version of SJ-180, the "Alternate Proceed Tone" is at, "Edit - "Common Page 1", then in the right side column, it is the last check box in the line of options, after "Auto Backlight", and before the Horn Alert settings.