IEEE-488 Reference
4-207
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 volts.
With line synchronization disabled, the integration period will simply start when the reading is
triggered. See paragraph 3-12 for details.
Programming example 10 OUTPUT 716; “:syst:lsyn:stat on; stat?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Two commands in this program message; the first enables line sync, and the second
queries the state of line sync.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the state of line sync (1; on).
4.22.9 :KEY <NRf>
:SYSTem:KEY <NRf> Simulate key-press
Parameters <NRf> = 1 Up Arrow <NRf> = 16 NEXT
= 2 TEMP = 17 Down Arrow
= 3 Left Arrow = 18 ENTER
= 4 MENU = 19 Ω4
= 5 ACI = 20 FILTER
= 6 STORE = 21 SCAN
= 7 LOCAL = 22 ACV
= 8 PREV = 23 REL
= 9 AUTO = 26 FREQ
= 10 Right Arrow = 27 MAT
= 11 EXIT = 28 CONFIG
= 12 Ω2 = 29 DCI
= 13 RECALL = 30 TRIG
= 14 CHAN = 31 INFO
= 15 DCV
Format :syst:key <NRf>
Query :KEY? Query last “pressed” key.
Short-form format: :syst:key?
Response message: 1 to 31
Description This command is used to simulate front panel key presses. For example, to select DCV you can
send the following command to simulate pressing the DCV key:
:syst:key 15
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