Frequency alarm is used to count the frequency of personnel's appearance in monitoring scenes. An alarm will be triggered if the frequency reaches the configured threshold.

1. Go to System Management > System Configuration > Frequency.
2. Configure the parameters as below.

   Table 1. Parameter Setting

   Parameter Name	Description
   Enable	Check Enable.
   Arming Camera	Select the desired camera to count the personnel appearance frequency.
   List to Filter	Filter the personnel in list library so that those personnel will not be counted.
   Filtering Threshold	Compare the similarity between face captured by camera and that of face list library. If the similarity is greater than or equal to the set value, the personnel captured will not be counted.
   Times	Frequency alarm will be generated only when the appeared times is greater than the configured times.
   Capture Interval (min)	The internal of capturing face picture for the same personnel. (Unit: minute)
   Similarity	Compare the similarity between newly captured face pictures and all captured face pictures. If the similarity is greater than or equal to the configured value, the appearance frequency for the same personnel will be counted.
   Day Range	The statistics period of personnel appearance frequency. The data of the earliest day will be covered by the newly-added data if the actual number of days is greater than this value.
   Time Segment	Set time period to count personnel appearance frequency.

   Figure 1. Enable Frequency Alarm
3. Click Save.