HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

Returning the Spectrum Analyzer to its Former State
The following programs read a trace stored in a file and load it into a variable.
Program Example for the HP-IB Interface
10 !FILE: "IBPROGS"
20 !define 202 character string:
30 DIM Learn,string$[202]
40 !create 401 point array to store trace:
50 INTEGER Trace,a(l:401)
60 Analyzer=718
70 !assign path to the file:
80 ASSIGN @File TO "STATE"
90 !get values for Learn-string$
100 !and Trace-a(*) from disk:
110 ENTER OFile;Learn-string$,Trace,a(*)
120 !send learnstring to spectrum analyzer:
130 OUTPUT Analyzer;"IP DONE;"
140 ENTER Analyzer
150 OUTPUT Analyzer;Learn-string$
160 !set single sweep mode:
170 OUTPUT Analyzer;"SNGLS;"
180 !prepare spectrum analyzer for a trace from
190 !the computer:
200 OUTPUT Analyzer;"TRA #A";
210 !send trace to the spectrum analyzer
220 OUTPUT Analyzer USING "#,W";802,Trace-a(*)
230 !view trace to see it was sent:
240 OUTPUT Analyzer;"VIEW TRA;"
250 !close file:
260 ASSIGN @File TO *
270 END
The HP-IB program reads a trace stored in the file STATE, then loads it into the variable
Trace-$ *).
First, the settings of the spectrum analyzer that were stored in the variable LEARN$ are
recalled. The spectrum analyzer state is changed to the same state as when the trace was
stored. Then previously stored trace data is returned to the spectrum analyzer and the trace is
viewed on the spectrum analyzer screen. Finally, line 220 uses the HP BASIC USING command
to format the trace data.
3-l 2 Programming Topics