SMIQ Utilities
1125.5555.03 2.419 E-9
Calibration VECTOR MOD
In order to obtain accurate and reproducible measurements, the I/Q modulator has to be calibrated. To
do this the internal calibration routine VECTOR MOD is used for adjusting the residual carrier, I/Q
imbalance and quadrature offset of the modulator. Calibration should be carried out prior to the
measurement but after a warm-up time of approx. 1 h or in the case of temperature changes of more
than 5° C.
Menu selectiom: UTILITIES - CALIB - VECTOR MOD
SYSTEM
REF OSC
PHASE
PROTECT
CALIB
DIAG
TEST
MOD KEY
AUX I/O
BEEPER
INSTALL
ALL
VCO SUM
VECTOR MOD
LEV PRESET
OSC REF
LEVEL
ALC TABLE
LEV ATT
FREQ
100. 000 000 0
MHz
LEVEL
- 30.0
dBm
CALIBRATE
FREQUENCY
LEVEL
ANALOG MOD
VECTOR MOD
DIGITAL MOD
DIGITAL STD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
Fig. 2-263 Menu UTILITIES - CALIB - VECTOR MOD menu
CALIBRATE
Triggers a calibration for the I/Q modulator, for FSIM, NDSIM and MCOD.
IEC/IEEE-bus command :CAL:VMOD?
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