Configuring the Internal Baseband Source
R&S
®
SMW200A
228User Manual 1175.6632.02 ─ 30
Table 5-4: Output connectors for the reference clock signal
Baseband generator Connector Location GUI selection
Standard
(R&S SMW-B10)
T/M/C Local connectors on
each board
To configure the connector:
●
"Custom. Dig. Mod/Digital Stan-
dard > Clock Settings > Local
Connectors > Direction > Output"
●
"Custom. Dig. Mod/Digital Stan-
dard > Clock Settings > Local
Connectors > Signal > Symbol
Clock"
To enable the clock source:
●
"Custom. Dig. Mod/Digital Stan-
dard > Clock Settings > Clock
Source > Internal"
Wideband
(R&S SMW-B9)
T/M/C Local connector on
the coder board
Connector configuration is not
required.
This signal is the default one, if "Cus-
tom. Dig. Mod > Data Source > Data
Source > External Serial".
●
External clock reference
Supply the external clock via the connectors listed in Table 5-5.
Table 5-5: Input connectors for the external reference clock signal
Connector Location GUI selection
T/M/C Local connector on each
coder board
To configure the connector:
●
"Custom. Dig. Mod/Digital Standard > Clock Set-
tings > Local Connectors > Direction > Input"
●
"Custom. Dig. Mod/Digital Standard > Clock Set-
tings > Local Connectors > Signal > Clock"
To enable the clock source:
●
"Custom. Dig. Mod/Digital Standard > Clock Set-
tings > Clock Source > External Local Clock"
The signals provided at the global and local connector are configurable. However,
there is a limitation on the number and the type of signals that are configured simulta-
neously, see Chapter 12.2.2.5, "Internal Resources for the Trigger, Marker, Clock and
Control Signals", on page 719.
Internal and external clock synchronization
When the external clock reference is selected, the internal clock is synchronized to it.
Internally, the instrument interprets the rising edge as the active edge. The active edge
of the external clock signal is configurable ("Local Connector Settings > Clock Input
Slope"). The active rising edge of the internal clock is synchronized with either the ris-
ing or the falling edge of the external clock reference.
Proper synchronization
The correct synchronization of the clock synthesizer requires that a special procedure
is maintained. Refer to "To apply an external clock signal" on page 285 for a descrip-
tion of the required steps.
Common Functions and Settings in the Baseband Domain
To Next Page
Loading...