# Trigger camera on PTP Timestamp Modulo Event

**URL:** https://forum.commonvisionblox.com/t/trigger-camera-on-ptp-timestamp-modulo-event/311
**Category:** General Questions
**Tags:** acquisition, configuration, ptp
**Created:** [December 21, 2017, 12:25pm UTC](https://forum.commonvisionblox.com/t/trigger-camera-on-ptp-timestamp-modulo-event/311 "2017-12-21T12:25:09Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![parsd](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.commonvisionblox.com/parsd/32/7_2.png) [@parsd](https://forum.commonvisionblox.com/u/parsd)
#### Post date: [December 21, 2017, 12:25pm UTC](https://forum.commonvisionblox.com/t/trigger-camera-on-ptp-timestamp-modulo-event/311/1 "2017-12-21T12:25:10Z")

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Split from another topic:

> [@Find CVB libraries via CMake](https://forum.commonvisionblox.com/t/find-cvb-libraries-via-cmake/302/3):
>
> Another question: I am using PTP sync on the cameras and would like to trigger each camera on a clock modululs event. Is there some instruction on how to achieve this?

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### Author: ![dusalf](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dusalf](https://forum.commonvisionblox.com/u/dusalf)
#### Post date: [December 20, 2017, 3:11pm UTC](https://forum.commonvisionblox.com/t/trigger-camera-on-ptp-timestamp-modulo-event/311/2 "2017-12-20T15:11:19Z")

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Hi,

assuming you have PTP running (set PTP Mode to Automatic) you need to set the Timestamp Modulo Event and the Timestamp Modulo Event Start Time according to your framerate.  
Once this is done set the Trigger Selector to Single Frame Trigger and set the Trigger Source to Timestamp Modulo Event. Now after enabling the trigger and starting the acquisition you get the framerate according to your Timestamp Modulo Event.

Hope that helps.