Agilent Technologies L4400 - Manual (Page 92)

80 L4400 User’s Guide
3 Operating and Programming
• If you define a scan list with the sequential mode enabled and later
disable the mode, the scan list will not be reordered; however, the
scan list will be treated as a non- sequential list thereafter.
• If you have defined a scan list with the sequential mode disabled
(OFF) and later enable the mode, the channels will be reordered.
• Non- sequential scan lists are not stored as part of the instrument
state by the *SAV command; in this case, the ordered mode will be
enabled and the scan list will be empty when the instrument state is
restored (
*RCL command).
• The scan order setting is stored in volatile memory and the ordered
mode will be enabled when power is turned off or after a Factory
Reset (
*RST command).
The command used to control the order of the scan list is:
ROUTe:SCAN:ORDered {OFF|ON}
Monitor Mode
Usage:
• L4450A 64- Bit Digital I/O (digital input, counter channels only)
• L4452A Multifunction Module (digital input, totalizer channels only)
In the Monitor mode, the instrument takes readings as often as it can on
a single channel or during a scan. This feature is useful for
troubleshooting your system before a test or for watching an important
signal.
• Any channel that can be “read” by a device can be monitored. This
includes the digital input, totalizer, and the counter channels.
• Readings acquired during a Monitor are not stored in memory.
However, all readings from a scan in progress at the same time are
stored in memory.
• The Monitor mode is equivalent to making continuous measurements

on a single channel with an infinite scan count. Only one channel can
be monitored at a time but you can change the channel being
monitored at any time.
• A scan in progress always has priority over the Monitor function.
• Channels do not have to be part of an active scan list to be
monitored; however, the channel must be configured for a
measurement in order to be monitored.
• The Monitor mode ignores all trigger settings and takes continuous
readings on the selected channel using the IMMediate (continuous)
source.