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 1-28 shows
how the hardware is configured.
Unit Under Test
rfT-t-,
Stimulus
L
Souroe
O-5OOmV
Response
Counter
HP-16
HP
BASIC
Controller
Figure l-28. Voltage Controlled Oscillator Test
Program Listing.
20
!
30
INTEGER
First,Last,Testpoint,Dummy
40
DIM
Id$[701
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
QStimulus;"*RST"
150
OUTPUT
OResponse;"*RST"
160
!
170
PRINT "Voltage Controlled Oscillator Test"
180
PRINT
190
!
200 PRINT "Source Used .
..'I
Getting Started Programming 1-77
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