Agilent Technologies E4406A manual Trigger Keys, •RF Burst Wideband •Video IF Envlp

Setting the Mode

Mode Setup

Trigger Keys

The Trigger key accesses the mode setup menu for the following trigger sources. See See “Trigger Source” on page 92. for a description of trigger sources including:

•RF Burst (Wideband)

•Video (IF Envlp)

•Ext Front

•Ext Rear

Pressing one of the trigger source keys will access the mode setup menu. This menu is used to set the Delay, Level, and Slope for each trigger source. Note that the actual trigger source is selected separately for each measurement (under the Meas Setup key).

•Delay key. This key is used to set the delay time for trigger sources.

For trigger delay use positive values. For pre-trigger delay use negative values. The range of the trigger delay is −500 ms to +500 ms.

•Level key. For the RF Burst (Wideband) selection the level is relative to the peak level of the RF signal (for the RF Burst trigger you will enter a peak level value with a key labelled Peak Level, rather than Level). For the Video selection the level is the value, in dBm at the RF

input, that will cause the trigger. For the Ext Front and Ext Rear selections, the level range is −5 to +5 volts.

•Slope key. This key allows you to trigger off of the positive-going edge (Pos) or the negative-going edge (Neg) of the trigger source signal.

Other keys accessed under the Trigger key:

•Trig Holdoff key. Sets the period of time before the next trigger can occur.

•Auto Trig key. Acts as a trigger timeout. If no trigger occurs by the specified time, a trigger is automatically generated. When set to On the instrument will take data when it receives a signal from the current trigger source; if no signal is received in the expected time period, the time period will default to the Free Run trigger default time period. When set to Off (the default setting) data will only be taken if a trigger has been set, and the Free Run trigger will not be automatically activated.

Chapter 3 85