Pre-Trigger State

Appendix B	Configuration Aspects for Programmers

The Pre-Trigger state is defined as the period after ChartScan has been configured to collect an acquisition (via the Trigger Configuration T command), and before the actual Trigger event occurs. While the unit is in this state, the TRIGGER LED will flash. As in any other acquisition state, the alarms and their associated outputs will be updated at the fastest rate possible under the current channel configuration.

Trigger With Synchronization Flag Off

Trigger With Synchronization Flag On

It is during this state in which ChartScan may be configured to collect Pre-Trigger data. This may be accomplished by specifying a non-zero value for the Pre-Trigger count parameter of the Set Count Y command. The Pre-Trigger count value coupled with the current channel configuration, however, cannot exceed the total amount of available memory.

If the Pre-Trigger count is set to a non-zero value, ChartScan will begin sampling Pre-Trigger data at the rate specified by the current normal scan interval (via the Set Scan Interval I command) immediately after the Trigger Configuration T command is issued. When the Trigger event occurs, the Pre-Trigger data portion of the Trigger Block will contain the most recent Pre-Trigger scans. The number of Pre-Trigger scans collected will depend upon when the Trigger event occurs. If the Trigger event occurs before the number of Pre-Trigger scans collected at least equals the specified Pre-Trigger count, the number of Pre-Trigger scans will be the number of scans collected to that point. Otherwise, the number of Pre-Trigger scans will be the number specified by the Pre-Trigger count parameter of the Set Count Y command.

If it is not desired to collect any Pre-Trigger data while in the Pre-Trigger state, the Pre-Trigger count parameter of the Set Count Y command may be set to zero.

Pre-Trigger data may not be accessed while ChartScan is in the Pre-Trigger state. The Pre-Trigger data for a particular Trigger Block is not made available to be read until the specified Trigger event occurs.

There are two ways to determine if the unit is in the Pre-Trigger state:

1.Visually check the TRIGGER LED. If it is flashing then the unit is in the Pre-Trigger state.

2.Query the Status Byte (STB) register and check the Triggered Bit. If the Triggered Bit is not set and the acquisition has been configured, then the unit is in the Pre-Trigger state. When the specified Trigger event occurs, ChartScan exits the Pre-Trigger state and enters the Post-Trigger state.

The Trigger Configuration T command has a synchronization parameter sync that allows you to specify if the Trigger point is to be synchronized to the Pre-Trigger (normal) scan interval. If sync is set, the Trigger point will occur on the next “tick” of the Pre-Trigger (normal) scan interval. Otherwise, the Trigger point will occur at the point at which it is detected. For example, assume a sync setting with a Pre-Trigger of 10 scans and a sample rate of 1 scan per minute. If a Trigger event takes place 20 seconds after a scan, a recorded Trigger point will happen on the next scan, 40 seconds later.

Continuous, Gap-Free Acquisition with Two Timebases

ChartScan can be configured to have different timebases for its Pre-Trigger and Post-Trigger states. The system can be configured such that, when the Trigger condition is met, ChartScan will switch from the Pre-Trigger to the Post-Trigger state (changing its timebase). This feature, along with automatic re-arm, can be used to collect continuous, gap-free data at two different timebases.

To ensure that the collected data is gap-free, the Pre-Trigger count must be set to -1 (via the Set Count Y command). If a value of 0 or higher is used as the Pre-Trigger count, only the number of Pre- Trigger scans is placed in the buffer after the Trigger condition is satisfied. The following graphs show an acquisition with the Pre-Trigger set to 100, and then an acquisition with the Pre-Trigger set to -1.

ChartScan User’s Manual

B-11

1400 specifications

The Omega Vehicle Security 1400 stands out as a premier solution for vehicle protection, offering a blend of advanced technology and user-friendly features. With the increasing rise of vehicle thefts, incorporating a robust security system has become essential for vehicle owners. The Omega 1400 aims to address these concerns effectively, ensuring peace of mind for users.

One of the key features of the Omega Vehicle Security 1400 is its sophisticated alarm system. The device is equipped with a motion sensor that activates the alarm when unauthorized movement is detected. This feature provides an added layer of protection, alerting owners to potential threats even when they are away from their vehicles. Additionally, the system comes with multiple sensors that monitor doors and trunk openings, fortifying security against tampering.

A standout component of the Omega 1400 is its remote control functionality, which allows users to arm and disarm the alarm with ease. Featuring a user-friendly remote, drivers can secure their vehicles from a distance, ensuring convenience and accessibility. The remote not only operates the alarm system but also integrates a panic button, which can be used in emergency situations to deter potential threats.

The Omega Vehicle Security 1400 is also designed with cutting-edge technology, offering compatibility with smartphone applications. This innovation enables users to monitor their vehicles in real-time, providing alerts directly to their mobile devices. Users can check the status of their vehicle, adjust settings, and receive notifications if the alarm is triggered, ensuring they are always connected to their vehicle's security.

Another remarkable characteristic of the Omega 1400 is its built-in GPS tracking capability. In the unfortunate event of a theft, the GPS feature allows vehicle owners to track the location of their vehicle, increasing the chances of recovery. This technology proves invaluable for users who prioritize the safety of their assets.

Additionally, the Omega Vehicle Security 1400 supports a robust battery backup system. This ensures that the alarm remains functional even if the vehicle's power supply is compromised. The reliability and durability of this security system make it a worthy investment for anyone looking to safeguard their vehicle.

In summary, the Omega Vehicle Security 1400 brings together advanced alarm technologies, remote access, GPS tracking, and reliable power support, creating a comprehensive security solution tailored for modern vehicle owners. Each feature has been designed with user convenience and vehicle protection in mind, making it a top choice in the vehicle security landscape.

Omega Vehicle Security 1400 manual Pre-Trigger State

Models: 1400