Instrument Function
R&S
®
SMU200A
142Operating Manual 1007.9845.32 ─ 15
Table 5-2: USER Connector Signals (Path B)
Signal Description
"Clock Out" output Path B; bit or symbol clock pulse
This signal corresponds to the clock signal for digital modulations. The
signal is generated automatically when the standard is switched on.
"LEV_ATT" input/output Path B
With active envelope curve control, this signal determines whether or
not the signal level is attenuated.
With external envelope curve control, the interface is input, otherwise
output. The envelope curve control is activated in the "Custom Digital
Modulation > Power Ramp Control" dialog.
The internal "LEV_ATT" control signal is defined in a control list which
must be loaded in the main menu.
"BURST" This signal corresponds to the control signal for envelope curve control.
With external envelope curve control, the interface is input, otherwise
output. The envelope curve control is activated in the "Custom Digital
Modulation > Power Ramp Control" dialog.
The internal "BURST" control signal is defined in a control list which must
be loaded in the main menu.
To access the "User Marker / AUX I/O" dialog:
1. Select "Setup > Environment > Global Trigger/Clock/External Inputs" or
2. In the "Baseband" function block select any digital standard, e.g. "GSM/EDGE" and
select "Trigger > Global Trigger/Clock/External Inputs".
The signals are assigned to the USER interfaces in the "Mapping Configuration" section.
The pin assignment of the AUX I/Oconnector is also displayed. An adapter between the
AUX I/O interface and coaxial BNC connections is available as an accessory (accessories
for R&S Signal Generator-Z5, see data sheet).
The polarity of the blank marker is selected in the "No Signal (Blank) Marker" section.
General Instrument Settings
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