2400 Series SourceMeter
®
User’s Manual Data Store 9-3
Timestamp
The first source-measure reading stored in the buffer (#0000) is timestamped at
0000000.000 seconds. Subsequent readings can be recalled in absolute or delta timestamp
format. For the absolute format, the timestamp references readings to zero seconds. For
the delta format, the timestamp indicates the time between the displayed reading and the
reading before it. To set the timestamp format, see “Timestamp format” in this section.
Displaying other buffer readings
To display the other source-readings stored in the buffer, display the desired memory loca-
tion number. The and keys for SOURCE and RANGE increment and decrement the
selected digit of the location number. Cursor position is controlled by the and keys.
When scrolling forward past the last stored reading, the buffer wraps to the first stored
reading. Conversely, when scrolling in reverse past the first stored reading, the buffer
wraps to the last stored reading. A different key click tone announces the wrap-around.
The memory location number can also be keyed in using the 0 through 9 number keys.
Position the cursor on the appropriate digit and press the desired number key. The cursor
then moves right to the next least significant digit. For example, to display reading #0236,
position the cursor all the way to the left (MSD) and press 0, 2, 3, 6. Note that if keying in
a number that exceeds the buffer size, the reading at the highest memory location is
displayed.
To exit from the data store recall mode, press EXIT.
Buffer statistics
With the data store in the recall mode, buffer statistics are displayed by using the TOG-
GLE key. Use the TOGGLE key to sequence through the statistics and return the
SourceMeter to the normal data store recall state. Pressing EXIT at any time returns the
instrument to the normal source-measure display state.
NOTE Buffer statistics for V, I,
Ω
, and MATH are calculated and displayed separately.
For example, if ohms readings are displayed, all buffer statistics displayed are
based on ohms readings.
Minimum and maximum
This mode displays the minimum and maximum readings stored in the buffer. The buffer
location number and timestamp are also provided for these readings. If desired, you can go
to those buffer locations to obtain more data about the readings.
Peak-to-peak
This mode displays the peak-to-peak reading (peak-to-peak = Maximum - Minimum).
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