CMU Data Handling (Data)
1100.4903.12 4.27 E-10
The contents of the ring buffer can be written to a binary file any time (even while
Buffer Writing is enabled); see Save to File softkey below. Saving the buffer
contents clears the buffer. On the other hand the buffer is not cleared when Buffer
Writing is enabled.
Remote control:
The commands for the layer 3 message log belong to the GSMxxx-MS Signalling
function groups:
MMEMory:L3Msg:BWRiting ON | OFF
Change
Dest.
The Change Dest. softkey opens a dialog to specify the name and path of the
created log file.
Editing the Change Destination dialog is optional: By default, the CMU stores log
files to the directory INTERNAL\LOG and uses the file names GSM_L3_?.LOG
where the question mark is replaced by current numbers that are automatically
incremented, starting with zero (auto-increment function). To create more than 10
different log files, another name or destination must be specified.
Selecting OK to Save closes the dialog window and stores the inputs made.
Pressing Cancel or Change Dest. again without selecting OK to Rename closes the
dialog box, discarding all inputs made.
Remote control
The commands for the layer 3 message log belong to the GSMxxx-MS Signalling
function groups:
MMEMory:L3Msg:CDEStination <FileName> [,<msus>]
Save to
File
Save to File saves the current ring buffer content to the log file specified via
Change Dest. and clears the ring buffer.
Note: The contents of the ring buffer are also saved when the instrument is
shut down, i.e. after pressing Alt+F4 on instruments equipped with a
FMR 5 or during the normal shutdown process (ON/STANDBY key;
"Shutdown in progress...") on instruments equipped with a FMR 6. To
distinguish files created during shutdown from ordinary log files they
are named GSM_L3_?.SAV where the ? is auto-incremented.
Remote control
The commands for the layer 3 message log belong to the GSMxxx-MS Signalling
function groups:
MMEMory:L3Msg:SAVe <FileName> [,<msus>]
MMEMory:L3Msg:BEMPty?
Transfer and Evaluation of Log Files
A log file can be transferred to a PC using the functions of the Arrange tab (see section File Manager
(Data – Arrange) on p. 4.29 ff.) or via GPIB bus using the MMEMory:DATA command. Rohde &
Schwarz provides an evaluation software tool for log files, the Message Viewer (option R&S CMU-Z49;
the extended version R&S CRTU GP01, stock no. 1139.7590.02, allows to edit layer 3 messages).
After loading the log file into the Message Viewer, the information can be evaluated as shown in the
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