HI Baron
You need to select CATALYST as the location service option.
Your screengrab shows it currently set to INTERNAL i.e. your phone's Internal GNSS chip
This is why you have no antenna height option.
Take a look below:
- Select the location service
- Plug in the Catalyst antenna
- Follow through the prompts to connect
![Catalyst as location service](https://higherlogicdownload.s3.amazonaws.com/TRIMBLE/JiveInlineImages/148138.png)
This will then enable the antenna settings option
![TF1](https://higherlogicdownload.s3.amazonaws.com/TRIMBLE/JiveInlineImages/148139.png)
Where you can specify the antenna height (to bottom of your antenna mount)
![TF2](https://higherlogicdownload.s3.amazonaws.com/TRIMBLE/JiveInlineImages/148140.png)