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IEEE-488 Reference
3-130
The messages in the queue are preceded by a number. Negative (-) numbers are used for SCPI
defined messages, and positive (+) numbers are used for Keithley defined messages. Table 2-5
lists the messages.
NOTE: The :SYSTem:ERRor? query command performs the same function as the :STA-
Tus:QUEue? query command (see STATus subsystem).
3.22.5
:LSYNc:STATe <b>
:SYSTem:LSYNc:STATe <b>
Control line synchronization
Parameters
<b> = O or OFF
Disable line synchronization
1 or ON
Enable line synchronization
Query
:STATe?
Query line synchronization
Description
This command is used to enable or disable line synchronization. When enabled, the integration
period will not start until the beginning of the next power line cycle. For example, if a reading
is triggered at the positive peak of a power line cycle, the integration period will not start until
that power line cycle is completed. The integration period starts when the positive-going sine
wave crosses zero.
With line synchronization disabled, the integration period starts when the reading is triggered.
See paragraph 2.19.7 for details on line synchronization.
3.22.6
:KEY <NRf>
:SYSTem:KEY <NRf>
Simulate key-press
Parameters
<NRf> = 1
Range Up Arrow
<NRf> =
16
NEXT
2
V-Source Up Arrow
17
Range Down Arrow
3
Left Arrow
18
ENTER
4
MENU
19
OPER
5
Q
20
TRIG
6
FILTER
21
RECALL
7
LOCAL
22
I
8
PREV
23
Z-CHK
9
AUTO
26
V-Source Down Arrow
10
Right Arrow
27
SEQ
11
EXIT
28
CONFIG
12
CARD
29
R
13
MATH
30
REL
14
STORE 31
INFO
15
V
Query
:KEY?
Query last "pressed" key.
Description
This command is used to simulate front panel key presses. For example, to select V (volts) you
can send the following command to simulate pressing the V key:
:syst:key 15
The parameter listing provides the key-press code in numeric order. Figure 3-40 also provides
the key-press code.
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