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SCPI Command Reference 4-12
Trigger Command
Summary
The Trigger commands control the trigger modes of the Model
3152. The Model 3152 can be placed in Triggered, Gated or Burst
mode. Trigger source is selectable from an external source, internal
trigger generator, backplane TTLTrg 0-7, and software trigger.
Optional modes are omitted from these commands. Factory defaults
after *RST are shown in bold typeface. Parameter low and high
limits are given where applicable.
Command and Parameters
Low Limit
High Limit
Default
INITiate:CONTinuous {OFF | ON}
ON
TRIGger:BURSt {OFF | ON}
OFF
TRIGger:COUNt <value>
1
1e6
1
TRIGger:DELay <value>
0/10
2e6
0
TRIGger:DELay:STATe {OFF | ON}
OFF
TRIGger:GATE {OFF | ON}
OFF
TRIGger:LEVel <value>
-10
10
1.6
TRIGger:SLOPe {POSitive | NEGative}
POS
TRIGger:SOURce:ADVance {EXTernal | INTernal | TTLTrg<n>}
EXT
TRIGger:TIMer: <value>
15e-6
1000
100e-6
TRIGger:IMMediate
*TRG
Backplane Inter-
Module Phase
Synchronization
Command Summary
Phase Synchronization commands control the phase offset between
two or more modules. There is no limit on how many modules can
be synchronized, as long as one module is programmed to be
master and the rest of the modules are slaves. The location of the
slave modules in relation to the master module does not affect the
accuracy of the phase offset.
The commands are presented exactly as they should be typed in
your program. Optional nodes were omitted from these commands.
Factory defaults after *RST or front panel reset are shown in bold
typeface. Parameter low and high limits are given where applicable.
Command and Parameters
Low Limit
High Limit
Default
PHASe:LOCK {OFF | ON}
OFF
PHASe:ADJust <value>
0
360 (*)
0
PHASe:SOURce {MASTer | SLAVe}
SLAV
PHASe:NULL
(*) High phase offset limit is not always 360
o
. It depends on the
number of points that were assigned to the active memory
segment. Phase offset limits are specified in Appendix A.
Front-Panel PLL
Command Summary
Front-panel PLL commands control the PLL mode and the phase
offsets with respect to an external reference. If the Model 3152 is
placed in PLL mode, it can be used as a slave only. After lock, the
synthesizer’s output frequency is exactly equal to the frequency of
the reference signal.
Revised 4/19/00
Содержание 3152
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