Rohde & Schwarz SMIQ02B - Page 228

SMIQ Digital Standard W-CDMA (NTT DoCoMo/ARIB 0.0)
1125.5555.03 E-92.159
Menu selection: DIGITAL STD - WCDMA - TRIGGER...
FREQ
100. 000 000 0
MHz
FREQUENCY
LEVEL
ANALOG MOD
VECTOR MOD
DIGITAL MOD
DIGITAL STD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
WCDMA
PHS
IS-95
WCDMA
NADC
PDC
GSM
DECT
STATE
MODE
SET DEFAULT
CHIP RATE
LINK DIRECT
MODULATION
TRIGGER MODE
EXECUTE TRIG
TRIGGER....
CLOCK
TOTAL POWER
TRIGGER SOURCE
INT EXT
EXT TRIGGER DELAY 0 Chip
EXT RETRIGGER INHIBIT 0 Chip
TRIGGER OUT1 RADIO FRAME
TRIGGER OUT2 CHIP SEQUENCE PERIOD
TRIGGER OUT1 POL POS NEG
TRIGGER OUT2 POL POS NEG
TRIGGER OUT1 DELAY 0 Chip
TRIGGER OUT2 DELAY 0 Chip
LEVEL
-30.0
dBm
PEP
- 14.9.9.
dBm
Fig. 2-92 Menu DIGITAL STD - WCDMA - TRIGGER..., equipped with options modulation coder
SMIQB20, data generator SMIQB11 and SMIQB43
TRIGGER... TRIGGER SOURCE
Selection of trigger source.
EXT The W-CDMA chip sequence is started
from frame 1 by means of the active
slope of an external trigger signal.
The polarity, the trigger threshold and
the input resistance of the TRIGIN input
can be modified in menu
DIGITAL MOD - EXT INPUTS.
INT A trigger event is manually executed by
EXECUTE TRIGGER.
IEC/IEEE-bus :SOUR:WCDM:TRIG:SOUR EXT
EXT TRIGGER
DELAY
Setting the number of chips by which an external
trigger signal is delayed before it starts the W-CDMA
chip sequence.
This is used for setting the time synchroneity
between the DUT and other units.
IEC/IEEE-bus :SOUR:WCDM:TRIG:DEL 3
EXT RETRIGGER
INHIBIT
Setting the number of chips for which a restart is
inhibited after a trigger event.
With TRIGGER MODE RETRIG selected, each new
trigger signal restarts the W-CDMA chip sequence.
This restart can be inhibited for the entered number
of chips.
Example:
The entry of 82000 chips, for example, causes new
trigger signals to be ignored for the duration of
82000 chips after a trigger event.
IEC/IEEE-bus :SOUR:WCDM:TRIG:INH 82000