4-6 TRIGGER MENU The Trig ger func tion in the ML2400A al lows the user to de fine un der what
con di tions mea sure ments are taken, and the time pe riod they are taken over.
For in stance, the READOUT mode can be con fig ured to dis play the av er age
power of the ON pe riod of a square wave, or an in di vid ual slot in a GSM burst.
The
Trig ger menus are al ways avail able in PROFILE op era tion mode, as se -
lected from the
Sys tem menu. If PROFILE can not be se lected within the Sys -
tem|Setup sub menu, change the GPIB mode to ML24XX in the Sys tem|Rear
Panel sub menu.
In READOUT or POWER vs. TIME modes, the trig ger setup menus are avail -
able if the chan nel in put con figu ra tion
SENSOR|Setup|MODE is set to
CUSTOM . A dis play chan nel us ing more than one sen sor (A–B for ex am ple)
where ei ther sen sor is in CUSTOM mode, is as sumed to be in cus tom mode
and can use trig ger ing. Trig ger setup is avail able only for the dis play chan nels
that meet the above cri te ria.
In PROFILE mode, the dis play shows an ‘x’ mark ing the trig ger point plus the
dis play trig ger de lay time, up dated for each new set of data. This trig ger point
mark ro tates as the pro file data is up dated, chang ing be tween '
´' and '+' on
each data up date. On rapid up dates, the trig ger point mark may ap pear like a
star (
S), as it is ro tat ing so quickly. In man ual, ex ter nal or GPIB trig gered dis -
plays, the mark ro tates at a slower rate and each true data up date can be seen.
This point can be moved across the x axis by the pre trigger percentage. If the
trigger source is either default, mod average or cus tom con tinu ous, the trigger
point has no meaning since the sys tem is con tinu ously trig ger ing. The mark
does not ap pear in the Power vs. Time or Source Sweep modes, as it is not
applicable.
Trig ger icons in di cate the type of trig ger ing se lected and ap pear level with the
re lated chan nel on the far left of the screen. Trig ger icons are not dis played if
the sys tem is in Pro file, Power vs. Time, or Source Sweep op er a tion modes, if
all sen sors used in a chan nel in put con fig u ra tion are in the DEFAULT mea -
sure ment mode, or if the peakmeter is dis played.
NOTE
When ed it ing an en try in a menu, press ing the
CLR key
clears the dig its. If in a menu screen, press ing the
CLR
key re turns to the pre vi ous menu level.
4-16 ML2400A OM
TRIGGER MENU OPERATION
NOTE
In CDMA read out
mode de fault trig ger
set tings are used and
can not be changed.
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