HP 24A, 83620A, 22A manual Program Comments

190 NEXT I

200 PRINT “Finished sending commands to source. ‘I

2 1 0 P R I N T “ N o t e t h a t e x e c u t i o n i s c o n t i n u i n g f o r f o u r c y c l e s . ”

220END

Run the program.

Program Comments

10: Assign the source’s HP-IB address to a variable.

20 to 50: Abort any HP-IB activity and initialize the HP-IB interface.

60:Clear the computer’s display.

70:Set the source to its initial state for programming.

80:Set the source up for a sweep, from 4 GHz to 5 GHz.

90:Set the sweep time to 2 second. In SCPI, suffixes are optional if you program in fundamental units (for sweep time, that would be seconds).

100:Send an ‘OPC? to the source.

110:Enter the query response to the *OPC? into a variable “X”. The program execution will halt here until the source has finished processing all the commands up to this point. Once complete, the source will respond to the *OPC? with a “1”.

120:Begin a FOR/NEXT loop that is repeated four times.

130: Initiate a sweep on the source.

140:Send a *WA1 command to the source. This command causes the source to stop executing new commands until all prior commands and operations have completed execution. In this case, there is a sweep in progress, so no further commands will be executed until the sweep finishes.

150:Turn the RF output of the source ON.

160:Initiate a sweep on the source.

170:Send another *WA1 to the source. Although the *WA1 command causes EXECUTION of commands to be held off, it has no effect on the transfer of commands over the HP-IB. The commands continue to be accepted by the source and are buffered until they can be executed.

180:Toggle the RF STATE to OFF.

190: Repeat the sample exercise.

200 and 210: Print messages on the computer display.

Getting Started Programming 1-97