Digital Modulation SMIQ
1125.5555.03 E-92.112
FREQ
100. 000 000 0
MHz
FREQUENCY
LEVEL
ANALOG MOD
VECTOR MOD
DIGITAL MOD
DIGITAL STD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
Π
ΠΠ
Π
/4DQPSK
SOURCE
RAMP TIME
RAMP FUNCTION
RAMP DELAY
ATTENUATION
... OFF
2.0 Symb
LIN COS
0.0 Symb
15.0 dB
LEVEL
- 30.0
dBm
PEP
-
27.6
.
dBm
SOURCE...
SELECT STANDARD...
MODULATION...
SYMBOL RATE
FILTER...
CODING...
TRIGGER MODE...
EXECUTE TRIGGER
TRIGGER...
CLOCK...
POWER RAMP CONTROL...
Fig. 2-67 DIGITAL MOD - POWER RAMP CONTROL menu, SMIQ equipped with option Modulation
Coder SMIQB20 and option Data Generator SMIQB11
(POWER RAMP
CONTROL...)
SOURCE
Selection between analog and digital envelope
control and selection of source.
OFF Envelope control is switched off.
IEC/IEEE
:SOUR:DM:PRAM:STAT OFF
INT Signals BGAT and LATT from the active
CONTROL LIST (CLIST) are used for
envelope control (only with option SMIQB11)
IEC/IEEE
:SOUR:DM:PRAM:STAT ON
:SOUR:DM:PRAM:SOUR CLIST
EXT_ANALOG Envelope control is via an external
analog signal that can be fed in via
connector POWER RAMP.
IEC/IEEE-bus commands
:SOUR:DM:PRAM:STAT ON
:SOUR:DM:PRAM:SOUR AEXT
EXT_DIGITAL Envelope control is via external
digital signals to be applied to
BURST GATE and LEV ATT of
connector PAR DATA.
IEC/IEEE-bus commands
:SOUR:DM:PRAM:STAT ON
:SOUR:DM:PRAM:SOUR DEXT
RAMP TIME
Input value of rise time of envelope after a transition
from Low→High of signal BURST GATE and of fall
time after a transition from High→Low.
The setting is a multiple of the symbol duration.
IEC/IEEE-bus
:SOUR:DM:PRAM:TIME 3.0
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