Fluke PM6681R Expression Data, Summary, Other Data Types, Example, S E N S F U N C F R E Q R

Introduction to SCPI

￿Example

SEND→ :SYST:TOUT￿ON or :SYST:TOUT￿1

This switches timeout monitoring on.

A query, for instance :SYSTem:TOUT?, will return 1 or 0; never ON or OFF.

Expression Data

You must enclose expression program data in parenthesis (). Three possibilities of expression data are as follows:

–<numeric expression data> <parameter list>

–<channel list>

An example of <numeric expression data> is: (X – 10.7E6) This subtracts a 10.7 MHz intermediate frequency from the mea- sured result.

An example of <parameter list> is: (5,0.02) This is a list of two parameters; the first one is 5 and the second one 0.02.

An example of <channel list> is: (@3),(@1) This specifies channel 3 as the main channel and channel 1 as the second

channel.

Summary

Other Data Types

Other data types that can be used for pa- rameters are the following:

–String data: Always enclosed between sin- gle or double quotes, for example

“This is a string” or ‘This is a string.’

–Character data: For this data type, the same rules apply as for the command header mnemonics. For example: POSitive, NEG- ative, EITHer.

–Non-decimal data: For instance, #H3A for hexa decimal data.

–Block data: Used to transfer any 8-bit coded data. This data starts with a pream- ble that contains information about the length of the parameter.

Example:

#218INP:IMP￿50;SENS￿10

H e a d e r s e p a r a t o rS e m ic o lo n
s e p a r a t e s S tinh eg le			o r d o u b le		A	q u e s t					io n
			s e p a r a t e s s e v e r a l
d if f e r e n t	qpuaortes	inofd aic a t e s			m a r k			in			d ic a t e s
			p r o g r a m	m e s s a g e s
c o m p o u n d	shteraind eg r d a t a				t h a t		a			r e s p o n s e
			in a s t r in g
					is	r e q u e s t e d
[ : S E N S ] : F U N C " F R E Q : R								A	T 3 , 1 " ; : C
S p a c e			A le a d in g c o lo n							lin e
s e p a rCaotme ms		a				N e w
			s he op wa rs a Pt hea asr et ntthhee s is
S q u a r e b r a c k e t s
h e a d es resv e r a lf odlloataw inf iegd ldic saetnedss											a
in d ic a t e s t h a t t h e						m e s s a g e
f r o m fdrao tma		e accohm mo tahneedxrp r e s s io n
t e x t in s id e is			s t a r t s dfartoam			t h e
o p t io n a l
			r o o t le v e l o f t h e
			c o m m a n d t r e e

3-12 Parameters