DE LAY
[TRGDLY
GTDLY]
In Pro file mode, DELAY sets the time de lay (af ter the dis play
trig ger de lay) to when the sys tem starts to take and dis play read -
ings, rep re sented by the left most cur sor. En ter 0.0 to 1.0 sec -
onds, in ms or
ms.
NOTE
Chang ing the left most cur sor, or the trig ger de lay time,
up dates the cur sor or the de lay time value ac cord ingly. In
Pro file mode, mov ing the cur sor only al lows up dates to
the pixel reso lu tion of the dis play. In Power vs. Time
mode, the de lay and width can be used to al ter the up date
rate.
In Read out mode (CUSTOM sen sor mode), the value en tered for
DELAY is ap plied af ter a trig ger event, and be fore sam ples are
taken. En ter 0.0 to 1.0 sec onds, in ms or
ms.
WIDTH
[TRGGW
GTGW]
En ter 100 ns to 7.0 sec onds (the de fault is 20 ms). In Pro file
mode, WIDTH is the gate time the sys tem uses to per form a cur -
sor av er age mea sure ment. The time in ter val is rep re sented by
the space be tween the left most cur sor and the right most cur sor.
Chang ing ei ther cur sor, or the gate width value, up dates both the
cur sors and the gate width value.
In Read out mode, this value de fines the meas ure ment gate
width. A meas ure ment is pre sented as the av er age of all data
taken in this gate width.
In Power vs. Time mode, the de lay and width can be used to al ter
the up date rate or sam ple rate.
EDGE
[TRGXTTL
GTXTTL]
When set to Ex ter nal TTL , the power me ter trig gers on a TTL
level ris ing or fal ling. This se lec tion sets the trig ger for ei ther a
ris ing or fal ling edge.
ARMING
[TRGARM
GTARM]
Sets the trig ger arm ing, un less the trig ger source is set to
EXTTTL . When ARMING is set to Blank ing ON, only sam ples
taken when the rear panel Digi tal In put BNC is ac tive will be av -
er aged in the meas ure ment. The po lar ity of the rear panel Digi tal
In put BNC sig nal can be set (high or low) us ing the
Sys tem|Rear
Panel|BNC| TTL LEVEL menu set ting.
When ARMING is set to Blank ing OFF, all sam ples are read ir re -
spec tive of the level on this BNC.
Fig ure 4-3 shows a typ i cal arm ing di a gram.
4-18 ML2400A OM
TRIGGER MENU OPERATION
NOTE
The av er ag ing func tion
av er ages a num ber of
gate WIDTHS, so for a
given av er ag ing num -
ber, larger WIDTHS will
take lon ger to AV ER -
AGE. Nar rower widths
will av er age faster (but
may yield a less-settled
mea sure ment).
NOTE
Use Arming to syn -
chro nize to other
equip ment or mod u la -
tion/burst syn chro ni za -
tion. This is a sim ple
way to inhibit mea sure -
ments dur ing
user-defined pe ri ods
with out en ter ing ac tual
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