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Programming Reference
SCPI Instrument Command List
Command
:PHAS[1|2]
Long
[:SOURce]:PHASe[1|2][:ADJust]
Form
Set & Query
Parameter
Numeric
Parameter suffix
DEG
or
RAD
. A parameter without a suffix is interpreted as
RAD
.
*RST value
0.0
Specified limits
0 to 360° constrained by delay and period limits.
Value coupling
Functional
coupling
Programming the pulse phase also executes
[:SOURce]:PULSe:HOLD
PHASe
so that the pulse phase is held constant when the signal frequency
is changed.
Description
Use this command to set/read the relative phase-delay of the output
signal. This is equivalent to setting an absolute or percentage pulse-delay
with
[:SOURce]:PULSe:DELay
.
If you want the phase delay to remain constant when the pulse period is
varied (rather than the absolute pulse delay) use
[:SOURce]:PULSe:DELay[1|2]:HOLD PRATio
.
Example
:PULS:DEL1 500NS
Set OUTPUT 1 delay to 500ns
:PHAS2 180 DEG
Set OUTPUT 2 phase to 180
°
:PULS:DEL1:HOLD TIM
Hold OUTPUT 1 delay constant with varying perio
d
:PULS:DEL2:HOLD PRAT
Hold OUTPUT 2 phase constant with varying period
Command
:PULS:DCYC[1|2]
Long
[:SOURce]:PULSe:DCYCle[1|2]
Form
Set & Query
Parameter
Numeric
Parameter suffix
PCT
*RST value
10.0% (derived from Width and Period)
D
elay =
Phase
360
Period×