Rohde & Schwarz SME02 - Page 205

SME Utilities
1038.6002.02 2.159 E-13
CALIBRATE Ð
Triggers the calibration for the VCO summing loop
IEC-bus short command :CAL:VSUM?
VIEW Ð
Indication of the list of correction values.
The cursor wraps to index 1 of the list. The list can be executed using the rotary
knob. This index can be obtained by entering the index value on the digit block.
IEC-bus short command :CAL:VSUM:OFFS?
:CAL:VSUM:DAC?
:CAL:VSUM:KOS?
Calibration LEV PRESET
In order to hold the amplitude modulator in the optimal working point with all frequency and level
settings, a second control element is mounted by means of which the level before the modulator is set in
such a way that the modulator always works in the best part of its characteristic. The setting values for
the second control element are stored in a table and can be renewed using internal calibration routine
LEV PRESET. The calibration routine needs only be executed in the case of a data loss in the RAM or
after an exchange of modules.
Function: By alternately adjusting the two level control elements, the calibration routine determines
the value for the presetting in which the amplitude modulator is operated at the attenuation
demanded. The calibration is executed according to a given frequency table at levels of
13dBm to -2dBm in steps of 3 dB. The routine takes approx. 2 min.
Menu selection: UTILITIES - CALIB - LEV PRESET
FREQUENCY
LEVEL
MODULATION
DIGITAL MOD
LF OUTPUT
SWEEP
LIST
MEM SEQ
UTILITIES
HELP
SYSTEM
REF OSC
PHASE
PROTECT
CALIB
DIAG
TEST
MOD KEY
AUX I/O
BEEPER
INSTALL
VCO SUM
LEV PRESET
PULSE GEN
REF OSC
QPSK
LEVEL
FREQ
100. 000 000 0
MHz
LEVEL
- 30.0
dBm
CALIBRATE
FREQUENCY RANGE NORM MIXER
LEVEL 16 13 10 7 4 1 -2 dBm
VIEW
10.00 MHz
50.00 MHz
93.75 MHz
110.00 MHz
130.70 MHz
93.75 MHz
104.50 MHz
558
562
514
534
638
374
358
0001
0002
0003
0004
0005
0006
0007
Fig. 2-70 Menu UTILITIES - CALIB - LEV PRESET
CALIBRATE Ð
Triggers the calibration for level preset.
IEC-bus short command :CAL:LPR?
FREQUENCY RANGE
Selection of the correction values displayed by VIEW
NORM Correction values, with the exception of the mixer range.
MIXER Correction values of the mixer range.