Front Panel Operation
3-83
3.8.2 Configuring data storage
The data storage configuration menu is used for the follow-
ing operations:
• To acquire a burst of readings at high speed.
• To select the data types stored in the buffer.
• To select the buffer control.
• To clear the buffer of readings and statistics.
• To specify the number of readings to store.
• To specify the source of readings to be stored.
Perform the following steps to display the CONFIG DATA
STORE menu:
1. From the normal reading display, press the CONFIG
key, and then the STORE key. The following menu is
displayed:
CONFIG DATA STORE
BURST-MODE DATA-GROUP CONTROL
CLEAR-ALL COUNT FEED
2. Use the cursor keys ( and ) to highlight the appro-
priate item and press ENTER to select it.
BURST-MODE
The burst mode is discussed in paragraph 3.8.1.
DATA-GROUP
This menu selection chooses the data items that are stored in
the buffer. To select it, highlight it with the cursor and press
ENTER. The following menu is displayed after a message
about changing the data group clearing the buffer:
BUFFER DATA GROUPING
FULL COMPACT
FULL: With this selection, for each reading, the following
information is stored: units, channel number (if applicable),
reading number, time-stamp, and status (overflow). The first
reading stored has a time-stamp of zero seconds; subsequent
readings are referenced to it.
The “full” data group should be used for 6.5 digits or greater
resolution. It also allows you to change function, range, or
channel while storing.
COMPACT: With this selection, readings, units, reading
numbers, and status (overflow) are stored. This allows more
readings to be stored in the buffer.
“Compact” is only accurate and displayed to 5.5 digits. It
does not allow changes of function, range, or channel while
storing.
CONTROL
This menu item controls the type of data storage. It is select-
ed by highlighting it with the cursor and pressing ENTER.
The following menu is shown:
BUFFER CONTROL
FILL-AND-STOP PRETRIGGER
CONTINUOUS NEVER
FILL-AND-STOP: This control selection fills the buffer
with the requested number of readings and stops. You can
then recall the readings.
PRETRIGGER: This selection continuously stores read-
ings until a user-programmed trigger event occurs. It then
stores post-trigger readings. For example, with a buffer size
of 100 readings, there will be 50 readings stored before the
trigger event and 50 readings stored after the trigger.
The first reading after the trigger is reading zero. Pretrigger
readings have reading numbers and time-stamps with a mi-
nus sign; post-trigger readings have reading numbers and
time-stamps with a plus sign.
Pretrigger control must be further configured. Selecting it
displays the following menu:
CONFIGURE PRETRIGGER
PERCENTAGE READING-COUNT EVENT
Percentage and reading-count specify the number of read-
ings to store before the trigger event, either as a percentage
of the total number of readings, or as a number of pretrigger
readings.
Event selects the source of the pretrigger, or “mark point”
event. This can be a Manual, GPIB, Trigger Link, or external
trigger.
CONTINUOUS: With this control selection, readings are
always stored in the buffer. The process continues, with the
oldest readings being overwritten in a circular manner, until
storage is interrupted with the EXIT key.
NEVER: Gets set to this if data storage has been interrupted.
Pressing the STORE key changes NEVER to FILL-AND-
STOP.
To Next Page
Loading...
