User`s manual

BASIC Program Example (TRIWAVE)
1 !RE-STORE“TRIWAVE”
2 !This program outputs a 200 point, 10 kHz, 4V triangle wave
3 !with a 1V DC offset.
4 !
10 !Assign I/O path between the computer and E1445A.
20 ASSIGN @Afg TO 70910
30 COM @Afg
40 !
50 !Set up error checking
60 ON INTR 7 CALL Errmsg
70 ENABLE INTR 7;2
80 OUTPUT @Afg;“*CLS”
90 OUTPUT @Afg;“*SRE 32”
100 OUTPUT @Afg;“*ESE 60”
110 !
120 !Call the subprograms
130 CALL Rst
140 CALL Tri_wave
150 !
160 WAIT .1 !allow interrupt to be serviced
170 OFF INTR
180 END
190 !
200 SUB Tri_wave
210 Tri_wave: !Subprogram which outputs a triangle wave
220 COM @Afg
230 OUTPUT @Afg;“SOUR:ROSC:SOUR INT1;”; !reference oscillator
240 OUTPUT @Afg;“:TRIG:STAR:SOUR INT1;”; !trigger source
250 OUTPUT @Afg;“:SOUR:FREQ1:RANG 0;”; !frequency range
260 OUTPUT @Afg;“:SOUR:FREQ1:FIX 10E3;”; !frequency
270 OUTPUT @Afg;“:SOUR:FUNC:SHAP TRI;”; !function
280 OUTPUT @Afg;“:SOUR:RAMP:POIN 200;”; !waveform points
290 OUTPUT @Afg;“:SOUR:VOLT:LEV:IMM:AMPL 4V;”; !amplitude
300 OUTPUT @Afg;“:SOUR:VOLT:LEV:IMM:OFFS 1V” !dc offset
310 OUTPUT @Afg;“INIT:IMM” !wait-for-arm state
320 SUBEND
330 !
340 SUB Rst
350 Rst: !Subprogram which resets the E1445.
360 COM @Afg
370 OUTPUT @Afg;"*RST;*OPC?" !reset the AFG
380 ENTER @Afg;Complete
390 SUBEND
400 !
410 SUB Errmsg
420 Errmsg: !Subprogram which displays E1445 programming errors
430 COM @Afg
440 DIM Message$[256]
Continued on Next Page
Chapter 2 Generating Standard Waveforms 67