Fluke PM6681R, PM6685R manual Introduction, Function Instrument Examples Type

Instrument Model

Introduction

The figure below shows how the instru- ment functions are categorized. This in- strument model is fully compatible with the SCPI generalized instrument model.

The generalized SCPI instrument model, contains three major instrument catego- ries as shown in the following table:

Function	Instrument	Examples
	type
Signal ac-	Sense in-	Voltmeter, Os-
quisition	struments	cilloscope,
		Counter
Signal	Source in-	Pulse genera-
genera-	struments	tor, Power sup-
tion		ply
Signal	Switch in-	Scaners,(de)-m
routing	struments	ultiplexers

An instrument may use a combination of the above functions. The CNT-8X coun- ters belong to the signal acquisition cate- gory, and only that category is described in this manual.

The instrument model in Figure 5-1de- fines where elements of the counter lan- guage are assigned in the command hierarchy. The major signal function ar- eas are shown broken into blocks. Each of these blocks are major command sub-trees in the counter command lan- guage.

The instrument model also shows how measurement data and applied signals flow through the instrument. The model does not include the administrative data flow associated with queries, commands, performing calibrations etc.

Inputs	Channels
A	1
	2		DISPlay
B
C	3
E	4		GPIB
	Measurement Function		FORMat
			OUTPut
	TRIGger	MEMory

Figure 5-1CNT-8X Instrument model. Note that Input B (channel 2) is not avail- able on PM6685.

5-2 Introduction