Instrument Function
R&S
®
SMJ100A
252
Operating Manual 1403.7458.32 ─ 14
Automatic Level Control is deactivated with pulse modulation!
When pulse modulation is activated, the ALC state of the R&S
SMJ is automatically
changed to "ALC OFF" ("Sample & Hold"). In this state, the ALC loop is opened and
the output level is not regulated but the level modulator is set directly. In order to set
the correct output level, a sample & hold measurement is executed after each fre-
quency or level setting.
The level is decreased by 30 dB during "Sample&Hold" measurement.
Pulse Modulation Settings
To open the "Pulse Modulation" menu, select "RF/A Mod > Configure > Pulse Modula-
tion" or use the MENU key under "RF/A Mod".
In the upper section of the menu, the modulation source is selected and the modulation
switched on. The configuration of the selected external and/or internal modulation
source is performed in the lower section of the menu.
The menu varies according to the selected modulation source.
State
Activates pulse modulation.
Activation of pulse modulation deactivates ALC and power ramping.
Remote command:
Source
Selects the modulation signal source for pulse modulation.
"Internal"
Uses the internal modulation signal source. The LF generator gener-
ates a rectangular pulse with the set frequency.
"External"
Uses an externally applied modulation signal.
The external modulation signal is input via the PULSE EXT connec-
tor.
RF Signal and Analog Modulations - RF Block
Содержание SMJ100A
Страница 34: ...Preface R S SMJ100A 18 Operating Manual 1403 7458 32 14 Notes on Screenshots...
Страница 86: ...Preparing for Use R S SMJ100A 70 Operating Manual 1403 7458 32 14 LXI Configuration...
Страница 139: ...Manual Operation R S SMJ100A 123 Operating Manual 1403 7458 32 14 Legend of Front Panel Controls...
Страница 140: ...Manual Operation R S SMJ100A 124 Operating Manual 1403 7458 32 14 Legend of Front Panel Controls...
Страница 454: ...Instrument Function R S SMJ100A 438 Operating Manual 1403 7458 32 14 Baseband Signal Baseband Block...
Страница 826: ...Remote Control Commands R S SMJ100A 810 Operating Manual 1403 7458 32 14 UNIT Subsystem...
Страница 828: ...Maintenance R S SMJ100A 812 Operating Manual 1403 7458 32 14 Storing and Packing...
Страница 843: ...Hardware Interfaces R S SMJ100A 827 Operating Manual 1403 7458 32 14 Figure A 2 BERT circuit diagram BERT Connector...
Страница 844: ...Hardware Interfaces R S SMJ100A 828 Operating Manual 1403 7458 32 14 BERT Connector...