HP 24A, 83620A Example Program, Figure l-28. Voltage Controlled Oscillator Test Program Listing

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

Stimulus 500mVSource

O-

vco

.

Response

ICounter

Figure l-28. Voltage Controlled Oscillator Test Program Listing.

20 !

30 INTEGER First,Last,Testpoint,Dummy

40 DIM Id$[70]

50ASSIGN @Stimulus TO 717

60ASSIGN @Response TO 718

70!

80First=0

90Last=100

100!

110CLEAR @Stimulus

120CLEAR @Response

130!

140OUTPUT OStimulus;"*RST"

150OUTPUT OResponse;"*RST"

160!

170PRINT "Voltage Controlled Oscillator Test"

180PRINT

190 !

200 PRINT "Source Used . . . 1,

l-78 Getting Started Programming