SMIQ Digital Standard 3GPP W-CDMA (FDD)
1125.5555.03 E-92.185
EXECUTE TRIGGER
Executes a trigger event at the start of the W-CDMA chip sequence.
IEC/IEEE-bus command :TRIG:DM:IMM
Fig. 2-108 DIGITAL STD – WCDMA/3GPP – TRIGGER... menu
TRIGGER...
Opens a window to select the trigger source, to configure trigger output signals
and to set the delay of an external trigger signal (see also section 2.14.2.11).
TRIGGER SOURCE
For selecting the trigger source.
EXT The W-CDMA chip sequence is started from
frame 1 on the active edge of an external
trigger signal. The polarity, the trigger threshold
and the input resistance of the TRIGIN input
can be changed in the DIGITAL MOD - EXT
INPUTS menu.
INT A trigger event is activated manually by
EXECUTE TRIGGER.
IEC/IEEE-bus :SOUR:W3GP:TRIG:SOUR EXT
EXT TRIGGER
DELAY
For setting the number of chips by which an external
trigger signal is delayed before it starts the W-CDMA
chip sequence. This is used to set up synchronization
with the DUT or other units.
IEC/IEEE-bus :SOUR:W3GP:TRIG:DEL 3
EXT RETRIGGER
INHIBIT
Sets the number of chips by which a restart is
delayed after a trigger event. If the RETRIG
TRIGGER MODE is selected, every further trigger
signal restarts the W-CDMA chip sequence. This
restart is inhibited for the number of chips that have
been entered.
Example:
The effect of entering 82000 chips is that any further
trigger signal is ignored for 82000 chips after a
trigger event.
IEC/IEEE-bus :SOUR:W3GP:TRIG:INH 82000
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