Anritsu ML2430A Bedienungsanleitung PDF herunterladen (Seite 46)

DELAY

[TRGDLY

GTDLY]

In Profile mode, DELAY sets the time delay (after the display trigger

delay) to when the system starts to take and display readings, rep

resented by the left most cursor. Enter 0.0 to 1.0 seconds, in ms or

ms.

NOTE

Changing the left most cursor, or the trigger delay time, up

dates the cursor or the delay time value accordingly. In Pro

file mode, moving the cursor only allows updates to the

pixel resolution of the display. In Power vs. Time mode, the

delay and width can be used to alter the update rate.

In Readout mode (CUSTOM sensor mode), the value entered for

DELAY is applied after a trigger event, and before samples are

taken. Enter 0.0 to 1.0 seconds, in ms or ms.

WIDTH

[TRGGW

GTGW]

Enter 100 ns to 7.0 seconds (the default is 20 ms). In Profile mode,

WIDTH is the gate time the system uses to perform a cursor aver

age measurement. The time interval is represented by the space

between the left most cursor and the right most cursor. Changing

either cursor, or the gate width value, updates both the cursors and

the gate width value.

In Readout mode, this value defines the measurement gate width.

A measurement is presented as the average of all data taken in this

gate width.

In Power vs. Time mode, the delay and width can be used to alter

the update rate or sample rate.

EDGE

[TRGXTTL

GTXTTL]

When set to External TTL, the power meter triggers on a TTL level

rising or falling. This selection sets the trigger for either a rising or

falling edge.

ARMING

[TRGARM

GTARM]

Sets the trigger arming, unless the trigger source is set to EXTTTL.

When ARMING is set to Blanking ON, only samples taken when

the rear panel Digital Input BNC is active will be averaged in the

measurement. The polarity of the rear panel Digital Input BNC sig

nal can be set (high or low) using the System|Rear Panel|BNC|TTL

LEVEL menu setting.

When ARMING is set to Blanking OFF, all samples are read irre

spective of the level on this BNC.

Figure 4-3 shows a typical arming diagram.

4-18 ML2430A OM

TRIGGER MENU OPERATION

NOTE

The averaging function

averages a number of

gate WIDTHS, so for a

given averaging num-

ber, larger WIDTHS will

take longer to AVER-

AGE. Narrower widths

will average faster (but

may yield a less-settled

measurement).

NOTE

Use Arming to synchro

nize to other equipment

or modulation/burst

synchronization. This

is a simple way to

inhibit measurements

during user-defined pe

riods without entering

actual time periods.

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