user manual

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