User manual

37
Documentation, Storage and Recall
to select the source for the reference to be saved. You can
select from the activated channels and mathematical cur-
ves. Open the menu to store and load by pressing the REF
key in the VERTICAL section of the control panel. With
the soft menu key RE1 to RE4 up to 4 references can be
activated. The top soft menu SOURCE allows you to use
the universal knob to select the source for the reference to
be saved. You can select from the activated channels and
mathematical curves. Press the soft menu key DISPLAY to
display the selected reference curve or to update the cur-
rent reference curve.
To load a reference from a USB stick or the internal me-
mory, open the soft menu LOAD. This shows a window
displaying the internally stored references. You can select
the desired target reference curve in the top menu item
andbypressingLOADinthelemanager.Tocomplete
loading and displaying the reference, press LOAD in the
lemanagermenuagain.Tosaveareference, press the
SAVE key, determine the source,storagelocation,le
name and curve, and press the soft menu key SAVE (with
thediskicon).TheFILENAMEcanbechangedoradjusted
to the corresponding setting (REF ist the default label). You
can use the soft menu key COMMENT to enter a comment
whichwillbedisplayedinthelemanagerfooteroncea
lehasbeenselected.
11.3 Cur ves
In addition to references, you can also store A/D converter
data. Curves can only be stored to externally connected
USB sticks (not internally). Depending on the selected time
base and sample rate in the ACQUIRE menu (AUTOMATIC,
MAX. SAMPLE RATE or MAX. WAVEFORM RATE) the
maximum read-out measurement points varies..
In the soft menu STORAGE the USB connection on the
front of the instrument is selected as storage location.
Selecting the respective storage location is possible when
a USB stick has been recognized. If a USB stick is connec-
ted, you can also change, create or delete directories. Use
the soft menu key SORT ENTRIES to sort several settings
The full memory can only be read out in STOP mode with the
maximum sampling rate setting (ACQUIRE menu).
lesbyname,type,sizeordate.PressACCEPTDIR.to
conrmthetargetdirectoryandyouwillautomaticallyre-
turn to the curve main menu.
The soft menu CURVE allows you to use the universal
knob in the CURSOR/MENU section to select a channel
which will be saved as a curve. You may only select chan-
nels that have been activated via channel keys. You can
also save all visible channels simultaneously.
The soft menu key FILE NAME opens the menu for the
name entry, where you can use the universal knob or the
KEYPAD key in the CURSOR/MENU section to enter a
nameandconrmyourentrybypressingACCEPT(TRCis
the default name). The curve main menu will display auto-
matically. You can open a selection window by pressing
thesoftmenukeyFORMATtodeterminetheleformat.
The universal knob in the CURSOR/MENU section allows
you to select the desired format. You can choose from the
following formats:
❙ BIN (MSB/LSB):
AbinarylemaycontainanytypeofBytevalue.The
captured curve data will be stored without any time
information.
❙ FLT (MSB/LSB):
AFLTlecontainsthecaptureddataasvoltagevalues.
ComparedtoaFLTle,thecapturedamountofdatafora
CSVleis16timesgreater.Thevoltagevaluesarestored
in the Float format (4 Byte Float, binary, Big Endian). This
lecanbereusedinprogramswrittenbyusers,for
instance.
❙ CSV (Comma Separated Values):
InCSVles,curvedataisstoredintableformat.Each
table row is separated by a comma.
Example: Curve with all visible channels
[s],CH1[V],CH2[V]
-4.99500E-07,-2.601E-03
-4.99000E-07,-6.012E-04
-4.98500E-07,-6.012E-04
-4.98000E-07,1.399E-03
❙ TXT:
TXTlesareASCIIlesthatonlycontainamplitude
values (no time values). Amplitude values are separated
by a comma. The value pairs are listed as single values
withoutidentication.
Example:
1.000E-02,1.000E-02,1.000E-02,1.000E-02,3.000E-02
You can use the universal knob in the CURSOR/MENU
section to select in the soft menu POINTS whether to read
Saving of all visible channels is only possible with the CSV format
and can not be changed.
If you choose the “Max. Sampling Rate” in the ACQUIRE menu,
two rows will be afxed with a time stamp during the CSV export
because a minimum and a maximum value must be assigned to
this time value. To acquire an amplitude value per time stamp,
activate “Automatic” in the ACQUIRE menu.
Fig. 11.3: Storage menu for curves