Displays the Trigger Source Menu.

Used when External or Video buttons are activated. Measurement begins after set time delay once the trigger has occurred. The delay can be entered either as a percentage of the sweep time or as an absolute time delay with units of ns, μs or ms. A negative % value puts the trigger position on screen while a positive value places the trigger point off the screen to the left.

A negative delay displays the trigger point on the screen, while a positive value places the trigger point off the screen to the left.

Used when External TTL, Video, or IF Power buttons are activated in the Trigger Source Menu. Sets a trigger level to initiate a measurement.

Sets the trigger slope to rising or falling.

When used, value unit is in dB. Hysteresis can be used with Level and Slope when setting a measurement trigger. Hysteresis is used to prevent undesired triggering when the signal is hovering near the trigger value. For example, the Level is set to 10 dBm, the Slope is set to Rising, and Hysteresis is 1 dB. The first trigger occurs when the signal reaches at least the 10 dBm level. To trigger again, the signal must drop below 9 dBm before returning to 10 dBm. For another example, with Level set to 10 dBm, slope set to Falling, and Hysteresis set to 1 dB, the opposite must occur to activate a trigger. The signal amplitude falls and a trigger occurs when the signal reaches the 10 dBm level. The signal must then reach at least 11 dBm before falling to 10 dBm and initiating a trigger.

Delays the next trigger to the time set regardless of triggers occurring within the set time.

Forces a sweep regardless of meeting any trigger criteria.

Returns to the Sweep Menu.

 

In this mode, a new sweep is started immediately upon completion of an old sweep. No trigger event is required to initiate a sweep.

This mode is used in zero span. A TTL signal applied to the External Trigger BNC input connector causes a single sweep to occur. Triggering occurs on the rising edge of the signal. After the sweep is complete, the resultant trace is displayed until the next trigger signal arrives.

This mode is used in zero span to use Video power as the trigger source. The power level can be set (using the submenu key for Level) from – 130 dBm to + 30 dBm, using the rotary knob, arrow keys, or keypad. The trigger is based on the measured signal level. If no signal reaches or exceeds the trigger level, then no trace will be on the screen.

This mode is used in zero span to use IF power level as the trigger source. The power level can be set (using the submenu key for Level) from – 130 dBm to + 30 dBm, using the rotary knob, arrow keys, or keypad. The trigger is based on the measured signal level. If no signal reaches or exceeds the trigger level, then no trace will be on the screen.

Returns to the Triggering Menu.