> For the complete documentation index, see [llms.txt](https://docs.phoenixlidar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.phoenixlidar.com/hardware-and-interfaces/hardware/backpack-lidar-mount/backpack-telescoping-boom.md).

# Backpack Telescoping Boom

The LiDAR backpack can be extended upwards to increase the LiDAR sensors ability to see over objects or features. This can be done in real-time during acquisition and does not require the operator to power the sensor down prior to extending the boom,

<figure><img src="https://lh7-us.googleusercontent.com/mMR2ymTsBr-JvoKToTqMb4juVZuxjvF0ndK--ss6Hxl1jtXOdX1gxRyDNwN_NPzilk8DYVR6B2grCjpAyzzZwARXnWG3E80mmeaFqzvqUv1Vt5elNYWQdatPFWuDnZxL50xFM9HlAEOlZTixkSSv-2U" alt="" width="563"><figcaption><p>Ranger FLEX telescoping boom</p></figcaption></figure>

* Raising the Boom requires loosening the two friction lock knobs located on the back and front of the backpack boom. See images below as reference.

{% tabs %}
{% tab title="Backpack Profile View" %}

<figure><img src="/files/Ka4bBSrT6Tw2F8QuPXoz" alt="" width="563"><figcaption><p>Backpack Profile</p></figcaption></figure>
{% endtab %}

{% tab title="Upper friction knob" %}

<figure><img src="https://lh7-us.googleusercontent.com/V90oS22om0Qc297KJMSpJu4LLnpSSgoe4jQpEoAtjDJm9iWbBsNgshAr8PP80QC_1vYP9BNJC8PbfjwDhwkFMg_RNY6aL-bsTtodE5u9459WDE_DQwxVCTPtn7o2Knzmpcmuejt9WQeLWDQHZ28FQy0" alt="" width="375"><figcaption><p>Rotate counter-clockwise to loosen</p></figcaption></figure>
{% endtab %}

{% tab title="Lower friction knob" %}

<figure><img src="https://lh7-us.googleusercontent.com/9kojbE2_35PdL0n6RO1-t5culLHhvQ2-p6jIq-8AI67vKztdWWjhN2MIfDpvqpGEJ9ZppNs0yRMIZk1Yw43u5GaVNyB_waAMNkLA1QeZGY9e2u-_QS4GMAtbhJvJeNkIXu2xfk9v0PcOLY3x5_UHCxA" alt="" width="375"><figcaption><p>Rotate counter-clockwise to loosen</p></figcaption></figure>
{% endtab %}
{% endtabs %}

* Once the boom is fully extended, rotate the friction knobs clockwise to lock the boom into place. No other changes to the sensor need to be made.
* The boom is designed to not affect Rover settings found in SE. you will not need to remeasure lever arms between the IMU and GNSS receivers.&#x20;

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