Scanner Setup (N) - Keithley 199 Instruction Manual

IEEE-488 PROGRAMMING
3.12.1 Scanner Setup (N)
The scanner setup command allows you to control chan-
nels individually, scan one channel per trigger or interval,
or scan one set of channels per trigger or interval, as
discussed below.
Manual Channel Control
The commands below open all channels or close each in-
dividual channel by sending the appropriate command.
NO
All channels open.
For the following commands, the indicated channel will
be closed. The closed channel number will appear in the
right most digit of the display.
Closed Channel:
2-Pole 4-Pole
Nl
1
N2
:
2
N3 3 3
4
i% 5
4
U-IAN 4 MAX Error
N6 6 CHAN 4 MAX Error
N7 7
CHAN 4 MAX Error
N8 8
WAN 4 MAX Error
NP CHAN 8 MAX Error
CHAN 4 MAX Error
Step (NlO-NlS)
In the step mode, the instrument scans one channel per
interval (continuous trigger mode), or one channel per trig
ger (one-shot trigger mode). With each interval or trigger,
the instrument closes a channel, takes a reading, and then
opens that channel. Subsequent intervals or triggers ad-
Vance channels to repeat the sequence.
The number of channels per step sequence is determined
by the command option used, which also sets the chan-
nel limit. The reading interval is set by the Q command
discussed in paragraph 3.12.3. Available triggers include
front panel, external trigger input (rear panel), and
IEEE-488 talk, GET, and X commands. The trigger source
is determined by the T command.
N10 Open all channels and stop step sequence. Subs+
quent intervals or triggers will not cause stepping.
For the following, the closed channel number appears in
the right-most digit of the display.
2-pole Limit 4pole Limit
Nil 1 1~
Nl2 2
2
Nl3 3 3
N14 4 4
N15 5
CHAN 4 MAX Error
N16 6 CHAN 4 MAX Error
Nl7 7 G-IAN 4 MAX Error
NE 8~ ~~
CHAN 4 MAX Error
NlP CHAN 8 MAX Error CHAN 4 MAX Error
Scan Mode
The scan mode commands allow you to scan a complete
set of channels per programmed interval (continuous trig-
ger mode) or trigger (one-shot mode), with the channel
limit determined by the command option. For example,
if a limit of four is set; the unit will begin at channel 1 and
then scan through channels 2 to-4 with each trigger
stimulus or interval.
N20 Open all channels and terminate scan sequence.
For the following, the closed channel number will
appear in the right-most digit of the display.
2-p& Limit
N21 1
N22 2
N23 3
N24 4
N25 5
N26 6
~N27 7
N28 8
4-p& Liiit
1
2~
3~
4
CHAN 4 MAX Error
Cl-IAN 4 MAX Error
CHAN 4 MAX Error
CHAN 4 MAX Error
Powerup DCLlSDC Default
Upon power up, or after a DCL or SDC, the NO mode (all
channels open) will be selected.
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