Example Programs
The following is an example program using SCPI compatible
instruments. The example is written in HP BASIC.
This example is a stimulus and response application. It uses a source
and counter to test a voltage controlled oscillator.
Example Program
Description. This example demonstrates how several SCPI
instruments work together to perform a stimulus/response
measurement. This program measures the linearity of a voltage
controlled oscillator (VCO). A VCO is a device that outputs a
frequency proportional to an input signal level. Figure
l-28
shows
how the hardware is configured.
Unit Under Test
c
vco
.
Stimulus
Response
Source
0
O-500mV
I
Counter
Figure
l-28.
Voltage Controlled Oscillator Test
Program Listing.
20
!
30
INTEGER First,Last,Testpoint,Dummy
40
DIM
Id$[70]
50
ASSIGN @Stimulus TO 717
60
ASSIGN @Response TO 718
70
!
80
First=0
90
Last=100
100
!
110
CLEAR @Stimulus
120
CLEAR @Response
130
!
140
OUTPUT
OStimulus;"*RST"
150 OUTPUT
OResponse;"*RST"
160
!
170
PRINT "Voltage Controlled Oscillator Test"
180
PRINT
190
!
200 PRINT "Source Used . . .
1,
l-78
Getting Started Programming
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