Giga-tronics 8650A Series, Руководство по эксплуатации

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Remote Operation
Manual 31470, Rev. E, April 2001 3-31
3.2.17 Peak Power Sensor Triggering
SENSe:TRIGger
The Peak Power Sensors sample power levels almost instantaneously. Since there is a sampler built into
the Peak Power sensor housing, there are several controls to configure the source of the sensor trigger
signal. These include the delay time from triggering to when the sample is to be taken (Sample Delay),
and the trigger level. All Peak Power Sensors will operate in the SWIFt and BURSt modes when in the
CW measurement mode (SOURce) configuration (not when using INT or EXT trigger).
Syntax : SENSe<sensor 1 or 2>:TRIGger:SOURce space <INTernal, EXTernal, or CW>
SENSe:TRIGger - SOUR EXT
Example : OUTPUT @Pwr_mtr;SENS1:TRIG:SOUR CW
! Set sensor 1 peak trigger mode to CW mode
Description : This command controls the trigger source for the sensors. Both the 80350A Series and
80340 Series of Peak Power Sensors respond to this command. INTernal triggering is
performed automatically by the 80350A Sensor; however, the trigger level must be set to a
value of power that is lower than the power level of the pulsed signal incident upon the
sensor. EXTernal triggering is performed by inputting a baseband pulse into the rear
connector on the sensor housing. BNC to SMB cables have been provided for this
purpose. For high speed trigger pulses, SMB to SMA adapters are available from Giga-
tronics. CW triggering sets the power sensors to measure CW power and triggering is
essentially disabled. CW is automatically set by the 8650A during power sweep calibra-
tion; do not apply any triggering to the peak power sensor during power sweep calibration.
Be sure to set the trigger level, SENS:TRIG:LEV ##.# after the INTernal or EXTernal trig-
gering is selected.
Syntax : SENSe<sensor 1 or 2>:TRIGger:DELay[:MAGnitude]: space<delay in seconds from
-20e-9 to 105e-3>
SENSe:TRIGger - DEL
Example : OUTPUT @Pwr_mtr;SENS1:TRIG:DEL 1e-/6 ! Set sensor 2 peak delay value to 1e-6
! seconds
Description : The SENS:TRIG:DEL # is the time in seconds between the 80350A Series Peak Power
Sensor’s receipt of a sensor trigger (INT is auto, EXT is a trigger input) and the time that
the sampler is fired. This delay is typically accurate to about 0.5%; repeatability is an order
of magnitude better. There is a delay line built into the peak power sensor. Therefore, you
can measure the power on the leading edge of the pulsed signal even if it is the same
edge on which the sensor was triggered. This also allows limited look ahead capability as
identified by the allowed negative time values for this command. The other reason
negative time values are allowed is due to the sample delay offset capability. (The 80340
Series Peak Power Sensors do not support this command.)
Syntax : SENSe<sensor 1 or 2>:TRIGger:DELay:STATe space <ON or OFF>
SENSe:TRIGger - DEL STAT
Example : OUTPUT @Pwr_mtr;SENS1:TRIG:DEL:STAT ON! Enable peak sensor 1 delay function
Description : This command activates the sample delay in the 80350A Series Peak Power Sensors. The
80340 Peak Power Sensors also respond to this command, but with only a fixed time
delay.