Giga-tronics 8003 - Page 203

Remote Operation
Manual 20791, Rev. C, June 2001 3-61
Trace Memory Programming Example
10 ! *************************************************************
20 ! PROGRAMMING EXAMPLE FOR TRACE MEMORY MANIPULATION
30 ! *************************************************************
40 !
50 OPTION BASE 1! All arrays start with index of 1
60 DIM Trace data(512)
70 !
80 ! First configure 8003 Analyzer
90 CLEAR 704 ! Device clear presets 8003
100 OUTPUT 704;SWP 1,A;on! Channel one displays sensor A power
110 OUTPUT 704;CHAN 2;off;CHAN 3;off;CHAN 4;off! turn off unused channels
120 !
130 ! Next configure the sweeper
140 OUTPUT 704;SWPF;start 8000;stop 12000;swpt 1000;level 0;level on
150 ! sweep from 8 GHz to 12 GHz, with 1 second sweep time, at 0 dBm
160 WAIT 5! Wait for sweeper to execute commands
170 !
180 ! Now scale analyzer for easy display
190 OUTPUT 704;SWP 1;scale .5;ref lev 0
200 !
210 ! =================================================================
220 ! Trace memory examples
230 !
240 ! First store channel 1 trace into trace memory 1
250 OUTPUT 704;SWP 1;store trc 1
260 !
270 ! Next subtract trace 1 from currently displayed trace (normalize)
280 OUTPUT 704;SWP 1;-trace 1
290 !
300 ! Display stored trace on channel 2
310 OUTPUT 704;SWP 2,A;on;trace 1
320 ! and scale channel 2
330 OUTPUT 704;SWP 2;scale .5;ref lev 0
340 WAIT 1! wait for analyzer to finish processing display
350 !
360 ! Now read trace into controller
370 OUTPUT 704;OUTPUT;trace 1
380 ENTER 704;Start freq,Stop freq,Trace data(*)
390 ! Note: output format is always start freq (MHz), stop freq (MHz), then
400 ! 512 data points of trace data in dB
410 !
420 ! Invert trace data as an example of user-manipulated trace data
430 MAT Trace data= (0)-Trace data
440 !
450 ! Now read trace back to different trace memory in analyzer
460 OUTPUT 704;INPUT;trace 2,Start freq,Stop freq,Trace data(*)
470 ! Note: input format follows above output format
480 !
490 ! And display user-manipulated trace on channel 3
500 OUTPUT 704;SWP 3,A;on;trace 2
510 ! and scale display
520 OUTPUT 704;SWP 3;scale .5;ref lev 0
530 !
540 ! To return channel 1 to measurement mode without trace memory
550 OUTPUT 704;SWP 1;meas
560 !
570 ! DEMONSTRATION OF OPEN/SHORT BRIDGE CALIBRATION USING TRACE MEMORIES
580 !
590 ! We will use SRQ interrupt to tell controller when calibration step
600 ! is done
610 Srq flag=0! Clear flag to indicate no SRQ received yet
620 ON INTR 7 GOSUB Trace srq
630 ENABLE INTR 7;2! Enable interrupts