User manual

Section 8: Scanning Series 3700 System Switch/Multimeter Reference Manual
8-8 3700S-901-01 Rev. C / July 2008
5. The trigger model leaves the idle state and opens channels involved in
scanning, along with channels that would interfere with scanning, such as
AMP channels, analog backplane relays 1 and 2 on all slots, common-side
ohm backplane channels, and other channels in banks involved in scanning.
When you press the STEP key, the Series 3700 leaves the idle state and
performs the channel action associated with the first step in the scan list.
Measurements are then taken (if part of the scan). If a reading buffer was
selected, the result from the measurements are stored there. The
measurement action, if started, is completed. The channel and DMM remain
as previously configured until the next step in the scan is initiated. The DMM
configuration changes to the attribute settings tied to the channel in the next
step.
NOTE While scanning is enabled, pressing most front panel keys will
display the message "ERROR CODE: 5522 Scan Running, Must
Abort Scan."
6. The channels are scanned or stepped in the order they were added to the
list.
Front panel: If you are stepping through the scan, press the STEP key
to proceed to the next step in the list.
Bus: You cannot step a scan remotely over the bus.
7. To abort the scan:
Front panel: Press the EXIT key.
Bus: Use the scan.abort ICL command.
NOTE Even if the scan is aborted, the DMM remains as configured in the
last completed step of a scan that involved measuring. Channel
states match the aborted state of channels in terms of which are
closed and opened.
The DMM remains as previously configured in the last completed measurement
step of a scan that involved measuring. The function associated with that
configuration will have the associated DMM attributes updated to match. All
other functions will remain as configured prior to scanning.
If programmed to scan the channels in the scan list again, the Series 3700 will
wait at the control source for another trigger event. After all the scan list
channels are measured again, the Series 3700 will output another trigger pulse,
if configured to do so. After all programmed scans are completed, the instrument
returns to the idle state with the channels associated with last scan step closed.