Rohde & Schwarz SME02 - Page 42

SME Fitting the Options
1038.6002.02 1.8 E-13
Adjustment Option SM-B5 loads the internal modulation generators so that their
output voltage decreases by approx. 1%. This causes a modulation
error which can be corrected by the adaptation of the corresponding
adjustments. This requires service kit SM-Z2 (stock no.:
1039.3520.02).
Standard generator
À Press key [PRESET].
À Set LFGEN1 in menu MODULATION / AM / AM SOURCE INT.
À Set the voltage at pin A6 of the plug of the module to 1 V (crest
voltage) using R298 (AF LEVEL) .
Option SM-B2,
LF generator
À Press the [PRESET] key.
À Set LFGEN2 in menu MODULATION / AM / AM SOURCE INT.
À Set the voltage at pin A7 of the plug of the module to 1 V (crest
voltage) using R55 (1Vp DDS ADJ).
Option SM-B6,
Multifunction generator
À Press the [PRESET] key.
À Set LFGEN2 in menu MODULATION / AM / AM SOURCE INT.
À Set the voltage at pin A7 of the plug of the module to 1 V (crest
voltage) using R380 (DAC1 AMPL ADJ).
À Press the [PRESET] key.
À Set the following in menu MODULATION / VOR :
- MODE NORM
- VAR DEPTH 0%
- SUBCARRIER DEPTH 0%
- COM/ ID STATE ON
- COM/ ID DEPTH 100%
À Set the voltage at pin A7 of the plug of the module to 1 V (crest
voltage) using R465 (DAC2 AMPL ADJ).