Programming instructions

44 Front-Panel Operation
Figure 3-2. The Process of Scanning Operation (in SCPI mode)
Overview Before initiating a scan, a scan list must be set up. You can also specify an
arm source, a trigger source, and the number of sweeps (a sweep is one pass
through the scan list) to control the scan process. All these can be done from
the S.List key. The S.List key structure in SCPI mode (Table 3-8) is
different from that in 3488A mode (Table 3-9 on Page 45).
Idle
Trigger Event
Detection
Arm Event
Detection
Another
Scan?
Another
Channel?
Scan key
Stop key
yes
no
no
yes
Scan Channel
Output Trigger*
Idle
Trigger Layer
Arm Layer
Controlled by
Arm Source
* Note: The trigger out pulse will occur at the specified trig-out line
only if you have configured to enable the slot to output.
Controlled by
Arm Count
Controlled by
Trigger Source
Controlled by
Scan List
Table 3-8. S.List Key Structure in SCPI Mode
1st Level
Items
2nd Level
Items
3rd Level
Items
4th Level
Items
Description
ADD TO SCAN SELECT nnn
Create a scan list to include all the desired
switch channels, DIO bit channels, and/or
the previously stored setups.
CONFIG SCAN
ARM: TIMER
ARM: IMM
ARM: BUS
ARM: EXT
ARM: MIX
ARM: HOLD
COUNT: 00001
TRIG: TIMER
TRIG: IMM
TRIG: BUS
TRIG: EXT
TRIG: MIX
TRIG: HOLD
Configure the scan operation, such as an
arm source, an arm count, and a trigger
source.
DELAY TIME
SET ALL nnnnn.nnn SECS
Set delay time for all channels or for
individual channels.
SET CH SELECT nnn nnnnn.nnn SECS