VXI VT1538A user manual SENSePERiodAPERture?, SENSePERiodLIMitUPPer

[SENSe:]PERiod:APERture?

[SENSe:]PERiod:APERture? <channel> returns the currently set APERture time.

Parameters

Parameter	Parameter	Range of	Default
Name	Type	Values	Units
channel	string	100 - 163	none

Comments • If the channel specified is on an SCP that doesn’t support this function, an error will be generated. See your SCP’s User’s Manual for its capabilities.

•Related Commands: SENS:PER:APER

•Returned Value: returns numeric aperture in seconds, The type is float32.

•Send with VXIplug&play Function: hpe14XX_cmdReal64_Q(...)

SENSe:PERiod:LIMit:UPPer

[SENSe:]PERiod:LIMit:UPPer <per_limit>,<ch_list> allows you to specify a period upper limit beyond which the E1538A will stop waiting for a signal transition and will return a period value of zero. Conceptually, this is an input signal period time-out.

Parameters

Parameter	Parameter	Range of	Default
Name	Type	Values	Units
per_limit	numeric (float32)	.004 to 60	Sec
ch_list	string	100 - 163	none

Comments • <ch_list> must be channels on an E1538A SCP.

Note Although SENS:PER:LIM:UPP can set a "timeout period" as long as 60 seconds, the longest supported periods are 1 second or 4 seconds depending on the setting of SENSe:PERiod:RANGe.

•...:LIMit:UPPer period is the maximum time the SCP will allow for any cycle period.

At any time during the period measurement, if the cycle period exceeds

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 57