> For the complete documentation index, see [llms.txt](https://drotek.gitbook.io/rtk-f9p-positioning-solutions/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://drotek.gitbook.io/rtk-f9p-positioning-solutions/tutorials/setting-nav-update-rate.md).

# Set Nav update rate

**This step-by-step tutorial will let you to manually set the nav update rate for the Base as well as the Rover.**

First, connect your GNSS device to a computer using a USB micro cable.

![](/files/-LdEnYZLwhXVFEwUuCNY)

Now start the U-blox “u-center” software. Then on the top left corner of the screen, left-click on the reversed tiny black triangle to select the COM Port related to your GNSS device. (it may differs from COM7 as shown in pictures)

![](/files/-LYbIddBqnC-aXKJ1bxh)

Make sure the connection icon is blinking in the bottom state bar. It indicates that the serial communication between the computer and the GNSS device is working.

![](/files/-LYbHSKTiJZ0j0qAf-5e)

Next go to ‘View’ then click on “Generation 9 Configuration View”

![](/files/-LYbUsIAWEUg8JmCOVN6)

A new window showing by default “GNSS Configuration” opens.

1. So first, click on “**Advanced Configuration**” to display all the configuration registers.
2. Then click on the small ‘+’ on the **CFG-RATE** line
3. You can now have access to an expanded menu and click on **CFG-RATE-MEAS**
4. Enter a valid update rate value in milliseconds (ex : a 1s refresh rate = 1000ms)
5. Click consecutively on **RAM**, **BBR** and **Flash** to write changes into RAM and both non-volatile memories (BBR and Flash)
6. Check the 3 corresponding commands are present in the “Ready to send” box and then click on ‘**Send**’

![](/files/-LYbe2kHOyeB8d_weD63)

{% hint style="success" %}
You have successfully set the Navigation Update Rate !
{% endhint %}