| www.tmatlantic.com
Test & Soldering Equipment On-line Store |
|
D.E.V.I.C.E. (Wiki)Calculators Services |
|||||
Filter by first letter
|
SynchronizationSearch by section D.E.V.I.C.E. services
Two-channeled alternative triggering for simultaneous observation of two nonsynchronized signals.
Edge triggering is performed when the signal level of synchronization source passes through the specified voltage level in the prescribed direction.
An edge trigger occurs when the input signal crosses the specified voltage level in the chosen direction. Depending on the functionality of oscilloscope capabilities the trigger can occur on rising, falling or rising & falling edge.
External synchronization signal is a synchronizing pulse which is external relatively to the measuring device (oscilloscope, generator, logic analyzer etc.) and it usually synchronizes with the system under test.
A special case of pulse width trigger is glitch trigger. In general glitch is a short pulse disturbance of uncontrolled parameters. Glitch synchronization is pulse trigger of the width which is less than the sampling period.
The trigger is made when a signal passed to the logic inputs causes the change of the specified function state for “true” or “false”.
The trigger is made in case all the signals being passed to the logic inputs of the logical function chosen cause the change of this function state for “true” or “false” when the clock input state is changed or stable (level timing).
Ordinary trigger mode is a mode when a signal record happens only after the trigger event detection. Prior to the data recording the oscilloscope stays in the trigger event waiting mode.
The trigger is made if during the specified period there has been no cross of the input signal with the specified voltage level in the specified direction. Pause report starts when the input signal crosses the specified voltage level in the specified direction.
A certain part of the waveform record which contains the readings registered before the trigger (prerecord).
Pulse Width trigger occurs according to the width of pulse. In other words this trigger mode is used to catch the pulses of the specified width.
Runt trigger is pulse amplitude triggering which crosses the first threshold level but doesn’t cross the second threshold level before the recross of the first one. Positive and negative pulse triggering is possible.
It is a rise time trigger, fall time trigger or both. Input signal trigger, the signal goes between two thresholds for the time which is more or less then the specified value; within or beyond the specified time interval.
Trigger is a synchronization event which sets zero reference time value in the signal registration in digital oscilloscopes.
Trigger coupling can be chosen depending on the signal type used for oscilloscope synchronization. There are several coupling types acceptable.
Trigger delay is a specified time interval after the trigger moment when the trigger system doesn’t take any other trigger signals. Trigger delay provides the stability of the signal image.
Trigger level is threshold voltage value the exceeding of which leads to a registration trigger signal forming in digital oscilloscopes.
The trigger mode determines the starting of recording (data collection) order in oscilloscope. 
Trigger source generates a signal for the registration. In most of cases triggering is used being synchronized with the registered and displayed signal.
The most well-known trigger types are: Edge trigger, Pulse trigger, Video signal trigger, Slope trigger and Alternative trigger.
Synchronization on video signal is used for the edge or line trigger from the synchronizing pulses of the standard video signals. The trigger mode on video signal is used to carry out the oscillograms of video signals fields and lines in NTSC, PAL or SECAM standards. 
The trigger is made at the signal input into the threshold window or the signal output out of it.
|
Measurement History Events
|
|