User manual

Phantom Help File182

4.2.5.2.6 Define a Post Trigger Value

The Post Trigger value represents how many frames will be recorded after the trigger signal has been

detected by the Phantom camera. Since the memory is a scrolling memory, the Post Trigger value

also sets the reciprocal number of pre-trigger images captured.

STEP-BY-STEP PROCEDURE

Determining a Post Trigger Value

To properly set a Post Trigger value you must first determine if:

The maximum number of images written in the cameras DRAM prior to the trigger signal

being detected by the camera, (all Pre-Trigger frames), are to be saved.

Set the Post Trigger to 1.

The maximum number of images the camera can write into DRAM after a trigger signal is

detected by the camera, (all Post Trigger frames), are to be saved.

Set the Post Trigger to the maximum number images for the selected camera, in other

words, the maximum number of images the camera can save.

NOTE

A Phantom camera can only store a finite number of images into its' memory buffer based

on the Resolution, Image Bit Depth settings, and the buffer, (amount of DRAM memory),

size.

The Post Trigger function is to introduce a delay, continue to record for a period of time after

the trigger signal has been detected by the camera, before saving the total number of

images the camera's DRAM will allow.

First, divide the desired delay time by the image interval time, (the image interval time is

the reciprocal of the sample rate), to get a number of images.

Go to Live - Advanced settings selector – Cine Advanced and check Trigger Delay. The

number of post trigger frames will automatically get the maximum value.

Enter the number of images derived at 3a in the text box next to Trigger Delay.

Post Trigger Application Example

The user needs to record 35 seconds of event time at a required sample rate that will only allow the

camera to record 10 seconds of the event. The good news is the user has multiple cameras that he/she

can network to together to record the event. The cameras are synchronized, and will be provided with

the same hard trigger, so that to will be the same for all cameras.