Anritsu ML2430A operation manual Sample Trigger in Graphic Mode

TRIGGER MENU OPERATION

Figure 4-4shows a typical trigger timing diagram. Note that the display trigger delay is only present when in Profile operation mode, and helps in setting the ‘window’ position along the signal.

PRETRIGGER %	CURSOR	CURSOR
	1	2

INCOMING SIGNAL

FROM SENSOR

DISPLAY TRIGGER DELAY

(PROFILE MODE)

GATE

WIDTH

DELAY

DATA COLLECTION TIME

(PROFILE MODE)

TRIGGER POINT

Figure 4-4.Sample Trigger in Graphic Mode

NOTE

External trigger is only effective at 800 KHz or lower.

The Data Collection Time (collection period) is only present when in Pro- file operation mode (SystemProfilePERIOD), and is the period of time displayed on the profile graph.

The Gate Width is the section of the signal in which the measurements are performed. In Profile mode, this is the time between Cursor 1 and Cur- sor 2 and is used to provide the Between Cursor Average measurement.

Display Trigger Delay (SystemProfileDELAY) is the delay after the trigger point.

The Pretrigger % (SystemGraphicsPRE TRG%) is only used in the Pro- file mode, and shows a percentage of the data collection time as Pretrig- ger information. If the display trigger delay is less than the pretrigger delay period, there will be no Pretrigger information as it will be before the trig- ger point itself.

Setting the display trigger delay to the length of the data pulse causes a trigger on the first pulse, but displays the second pulse with valid “pretrig- ger information.” This is the best method for repetitive signals and can be used to verify signal repetition intervals.

4-20 ML2430A OM