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134 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide
Programming Examples
RS-232 Programming Interface Examples (ESG/PSG/E8663B Only)
Queries Using HP Basic and RS-232
This example program demonstrates signal generator query commands over RS-232. Query commands
are of the type *IDN? and are identified by the question mark that follows the mnemonic.
rs232ex2.txt performs the following functions:
• resets the RS-232 interface
• sets the baud rate to match the signal generator rate
• reads the value of register 4
• queries the signal generator ID
• sets and queries the power level
Start HP Basic, type in the following commands, and then RUN the program:
The following program example is available on the signal generator Documentation CD-ROM as
rs232ex2.txt.
10 !********************************************************************************
20 !
30 ! PROGRAM NAME: rs232ex2.txt
40 !
50 ! PROGRAM DESCRIPTION: In this example, query commands are used to read
60 ! data from the signal generator.
70 !
80 ! Start HP Basic, type in the following code and then RUN the program.
90 !
100 !********************************************************************************
110 !
120 INTEGER Num
130 DIM Str$[200],Str1$[20]
140 CONTROL 9,0;1 ! Resets the RS-232 interface
150 CONTROL 9,3;9600 ! Sets the baud rate to match signal generator rate
160 STATUS 9,4;Stat ! Reads the value of register 4
170 Num=BINAND(Stat,7) ! Gets the AND value
180 CONTROL 9,4;Num ! Sets the parity to NONE
190 OUTPUT 9;"*IDN?" ! Querys the sig gen ID
200 ENTER 9;Str$ ! Reads the ID
210 WAIT 2 ! Waits 2 seconds
220 PRINT "ID =",Str$ ! Prints ID to the screen
230 OUTPUT 9;"POW:AMPL -5 dbm" ! Sets the the power level to -5 dbm
240 OUTPUT 9;"POW?" ! Querys the power level of the sig gen
250 ENTER 9;Str1$ ! Reads the queried value
260 PRINT "Power = ",Str1$ ! Prints the power level to the screen
270 END ! End the program