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annotate rs_fsp7_example.py @ 84:4b4ae555067b

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Use RMS detector and fix the sweep time for more accuracy. Add links to app notes discussing theory. Run forever without pause and print a summary on ctrl-c
author Daniel O'Connor <doconnor@gsoft.com.au>
date Thu, 03 Oct 2024 08:57:10 +0930
parents 00800345fbae
children
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1 #!/usr/bin/env python
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3 # Copyright (c) 2011
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4 # Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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5 #
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6 # Redistribution and use in source and binary forms, with or without
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7 # modification, are permitted provided that the following conditions
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8 # are met:
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9 # 1. Redistributions of source code must retain the above copyright
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10 # notice, this list of conditions and the following disclaimer.
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11 # 2. Redistributions in binary form must reproduce the above copyright
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12 # notice, this list of conditions and the following disclaimer in the
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13 # documentation and/or other materials provided with the distribution.
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14 #
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15 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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25 # SUCH DAMAGE.
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26 #
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27
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28 import numpy
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29 from matplotlib import pylab
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30 import rsib
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31 import scpi
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32
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33 def test(r):
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34 # ID instrument
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35 r.write('*IDN?')
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36 print("ID is " + r.read(5).decode('ascii'))
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37
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38 # Reset to defaults
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39 r.write("*RST")
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40
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41 # Set to single sweep mode
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42 r.write("INIT:CONT OFF")
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44 # Enable display updates
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45 r.write("SYST:DISP:UPD ON")
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47 # Set frequency range
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48 r.write("FREQ:STAR 85MHz;STOP 125MHz")
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49
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50 # Set reference level
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51 r.write("DISP:WIND:TRAC:Y:RLEV -20dBm")
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52
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53 # Trigger the sweep
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54 r.write("INIT;*WAI")
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56 # Wait up to 10 seconds for it to be done
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57 r.write("*OPC?")
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58 opc = scpi.getdata(r.read(10), int)
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59 print("OPC - %d" % (opc))
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61 # Set peak excursion
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62 r.write("CALC:MARK:PEXC 6DB")
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63 # Find 3rd order intercept & get result
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64 r.write("CALC:MARK:FUNC:TOI ON")
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65 r.write("CALC:MARK:FUNC:TOI:RES?")
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66 toi = scpi.getdata(r.read(1))
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67 print("Result = %.2f" % (toi))
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69 # Set data format
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70 r.write("FORM REAL,32")
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71 #r.write("FORM:DATA ASC")
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73 # Set limit line
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74 r.write("CALC:LIM5:NAME 'TEST1'")
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75 r.write("CALC:LIM5:COMM 'Upper limit line'")
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76 r.write("CALC1:LIM5:TRAC 2")
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78 # Grab trace data
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79 r.write("TRAC1? TRACE1")
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80 data = r.read(10)
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81 #print "Data - " + dat
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82 #ary = scpi.ascdecode(data)
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83 ary = scpi.bindecode(data)
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84
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85 # Plot data
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86 pylab.plot(ary)
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87 pylab.show()
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89 if __name__ == '__main__':
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90 r = rsib.RSIBDevice('analyzer')
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91 test(r)
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