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Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 25
Variable Width Pulse Per
Trigger
This means that the channel generates a pulse whose width is specified by
the algorithm each time the algorithm executes. The value sent by the
algorithm can range from 7.87µSec to 7.812mSec.
The command sequence to set-up this mode is:
SOURce:FUNCtion:PULSe (@<ch_list>) to enable pulse generation.
the following two commands return the E1538 to the Single pulse-per-trigger
mode from either the FM or Pulse Width Modulation modes. Since Single
pulse-per-trigger is the default pulse mode at power-up or after *RST, only *RST
then SOUR:FUNC:PULS (@<ch_list>) are actually needed.
SOURce:FM[:STATe] OFF,(@<ch_list>) to disable FM mode.
SOURce:PULM[:STATe] OFF,(@<ch_list>) to disable PWM mode.
To configure channel 44 to output a single controlled width pulse per trigger
*RST
after *RST, sour:func:puls is all that is required to enable the default single
pulse-per-trigger mode.
SOUR:FUNC:PULS (@144)
channel sources pulses...
ALG:DEF ’ALG1’,’static float outpulse=0.001; O144=outpulse;’
INIT
start alg execution
. . .
ALG:SCAL ’ALG1’,’outpulse’,5E-4
.5ms pulse
ALG:UPDATE
Figure 16. Output Variable Width Pulse per Trigger