Measure Period Use [SENSe:]PERiod:MODe APERture NPERiods,(@<ch_list>) to select the measurement interval setting mode.
Depending on the mode selected above use [SENSe:]PERiod:APERture <time>,(@<ch_list>) or
use [SENSe:]PERiod:NPERiods <n_periods>,(@<ch_list>) to set the interval for measuring and averaging signal periods.
For PERiod function, the E1538 spports two distinct measurement ranges:
1.When SENS:PER:RANGE is set to 1sec, the E1538 can measure periods from 10usec - 1sec. The value of SENS:PER:APER can range from 10usec - 1sec.
2.When SENS:PER:RANGE is set to 4sec, the E1538 can measure periods from 40usec - 4sec. The value of SENS:PER:APER can range from 40usec - 4sec. See SENS:PER:RANGE command on page 61
Use [SENSe:]FUNCtion:PERiod (@<ch_list>) to configure channels to measure signal period.
To measure the signal period at channel 45 with aperture of 01 second
*RST TRIGGER:TIMER .2 SENS:FUNC:PER (@145) SENS:PER:RANGE 1,(@145) SENS:PER:MODE APER(@145) SENS:PER:APER 1,(@145) ALG:DEF ’ALG1’,’writecvt(I145,45);’
INIT do loop
SENS:DATA:CVT? (@45)
read value from CVT query above end loop
Alg executes at .2 sec intervals ch 45 to measure signal period set period range 10μsec - 1sec set meas and avg interval mode meas and avg sig periods for 1S alg puts period in CVT
start algorithm execution
get period from CVT