Rohde & Schwarz CMU 200 - Synchronization

CMU CMU Base System
1100.4903.12 6.23 E-10
MMEMory:RECall:CURRent <FileName> [,<msus>]
Recall configurations in current function group and test mode
Parameters
Parameter description Def. value Def. unit FW vers.
"<FileName>",
INTernal | EXTernal
Name of the config. file to be recalled
Storage device of the config. file
–
INTernal
–
–
V3.10
Command description
This command recalls the configuration of the current function group and test mode from a configuration file. The
command is available in all function groups. This command is CMU-specific.
Synchronization
The Synchronize subsystem contains the commands for configuring the reference frequency. It corre-
sponds to the Reference Frequency softkey in the Sync. tab of the Connection Control menu. Note that
this tab is available in every function group
CONFigure:SYNChronize:FREQuency:REFerence <Frequency> Reference Frequency
<Frequency>
Parameter description Def. value Default unit FW vers.
10 kHz to 52 MHz Reference frequency 10 MHz Hz V1.12
Command description
The command defines the frequency of the synchronization signal.
CONFigure:SYNChronize:FREQuency:REFerence:MODE <Mode> Ref. Frequency Source
<Mode>
Parameter description Def. value Default unit FW vers.
INTernal |
EXTernal
Internal reference frequency used
External reference frequency used
INT – V1.12
Command description
The command defines the source of the synchronization signal. After activating the external reference frequency
(e.g. after a reset of the base system where the reference frequency is set to INTernal) it is necessary to allow
for a setting time (~1 s) until the CMU has synchronized. The query
[SENSe:]SYNChronize:FREQuency:REFerence:LOCKed? indicates whether the reference frequency is
locked. A partial reset of all function groups with the exception of the base system does not reset the source of
the reference frequency.
[SENSe:]SYNChronize:FREQuency:REFerence:LOCKed? Ref. Frequency Not Locked
Response
Parameter description Def. value Def. unit FW vers.
ON |
OFF
Synchronization to reference frequency achieved
Synchronization to reference frequency failed
– – V3.10
Command description
This command is always a query. It indicates whether the CMU is synchronized to the (external) reference fre-
quency.
Note: After activating the external reference frequency (command CONFigure:SYNChronize
:FREQuency:REFerence:MODE EXTernal) it is necessary to allow for a setting time
(~1 s) until the CMU has synchronized. In this case it is recommended to check whether
the reference frequency is locked before starting a measurement in remote control mode.