Buffer Statistics - Keithley 6430 Instruction Manual

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 for-
mat. 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
selected digit of the location number. Cursor position is controlled by the left and right arrow
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. Posi-
tion 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 TOGGLE
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).
and keys for SOURCE and RANGE increment and decrement the
▲ ▼
Data Store 8-3