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|00000000| 00 0b 73 70 65 63 74 72 | 6f 67 72 61 6d 00 00 00 |..spectr|ogram...|
|00000010| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 54 45 58 54 4d 50 61 | 64 00 00 00 00 00 00 00 |.TEXTMPa|d.......|
|00000050| 00 00 00 00 00 04 53 00 | 00 01 8e ad 87 45 2f ad |......S.|.....E/.|
|00000060| 87 45 2f 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |.E/.....|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 89 49 00 00 |........|.....I..|
|00000080| 2d 2d 20 43 72 65 61 74 | 65 20 61 20 66 72 65 71 |-- Creat|e a freq|
|00000090| 75 65 6e 63 79 20 76 73 | 2e 20 74 69 6d 65 20 20 |uency vs|. time  |
|000000a0| 73 70 65 63 74 72 6f 67 | 72 61 6d 20 69 6d 61 67 |spectrog|ram imag|
|000000b0| 65 2e 0d 2d 2d 20 52 65 | 71 75 69 72 65 73 20 58 |e..-- Re|quires X|
|000000c0| 66 75 6e 20 22 66 66 74 | 22 0d 0d 2d 2d 20 65 78 |fun "fft|"..-- ex|
|000000d0| 61 6d 70 6c 65 20 70 61 | 72 61 62 6f 6c 69 63 20 |ample pa|rabolic |
|000000e0| 66 72 65 71 20 73 77 65 | 65 70 0d 73 77 65 65 70 |freq swe|ep.sweep|
|000000f0| 28 74 29 20 3d 20 63 6f | 73 28 32 2a b9 2a 52 61 |(t) = co|s(2*.*Ra|
|00000100| 64 69 61 6e 73 2a 28 2e | 31 2b 2e 30 31 35 2a 74 |dians*(.|1+.015*t|
|00000110| 5e 32 29 2a 74 29 0d 0d | 6e 64 61 74 61 3d 35 31 |^2)*t)..|ndata=51|
|00000120| 32 0d 64 74 3d 31 2f 33 | 30 0d 73 69 67 6e 61 6c |2.dt=1/3|0.signal|
|00000130| 5b 69 5d 20 3d 20 73 77 | 65 65 70 28 64 74 2a 28 |[i] = sw|eep(dt*(|
|00000140| 69 2d 31 29 29 20 64 69 | 6d 5b 6e 64 61 74 61 5d |i-1)) di|m[ndata]|
|00000150| 20 20 2d 2d 20 73 61 6d | 70 6c 65 20 69 74 0d 0d |  -- sam|ple it..|
|00000160| 58 6d 69 6e 3d 30 3b 20 | 20 58 6d 61 78 3d 64 74 |Xmin=0; | Xmax=dt|
|00000170| 2a 6e 64 61 74 61 3b 20 | 20 58 6c 61 62 65 6c 3d |*ndata; | Xlabel=|
|00000180| 22 73 65 63 22 0d 70 6c | 6f 74 6c 69 6e 65 20 73 |"sec".pl|otline s|
|00000190| 69 67 6e 61 6c 0d 0d 2d | 2d 20 75 73 65 20 61 20 |ignal..-|- use a |
|000001a0| 73 6c 69 64 69 6e 67 20 | 64 61 74 61 20 77 69 6e |sliding |data win|
|000001b0| 64 6f 77 20 74 6f 20 73 | 65 65 20 70 6f 77 65 72 |dow to s|ee power|
|000001c0| 20 73 70 65 63 74 72 75 | 6d 20 63 68 61 6e 67 65 | spectru|m change|
|000001d0| 73 0d 2d 2d 20 22 77 69 | 6e 64 6f 77 22 20 69 73 |s.-- "wi|ndow" is|
|000001e0| 20 74 68 65 20 6e 75 6d | 62 65 72 20 6f 66 20 64 | the num|ber of d|
|000001f0| 61 74 61 20 70 6f 69 6e | 74 73 20 69 6e 20 74 68 |ata poin|ts in th|
|00000200| 65 20 77 69 6e 64 6f 77 | 0d 2d 2d 20 22 73 6c 69 |e window|.-- "sli|
|00000210| 64 65 22 20 69 73 20 74 | 68 65 20 6e 75 6d 62 65 |de" is t|he numbe|
|00000220| 72 20 6f 66 20 64 61 74 | 61 20 70 6f 69 6e 74 73 |r of dat|a points|
|00000230| 20 74 6f 20 6d 6f 76 65 | 20 74 68 65 20 77 69 6e | to move| the win|
|00000240| 64 6f 77 20 66 6f 72 20 | 65 61 63 68 20 73 70 65 |dow for |each spe|
|00000250| 63 74 72 61 0d 0d 73 70 | 65 63 74 28 73 69 67 6e |ctra..sp|ect(sign|
|00000260| 61 6c 2c 77 69 6e 64 6f | 77 2c 73 6c 69 64 65 29 |al,windo|w,slide)|
|00000270| 5b 69 2c 6a 5d 20 3d 20 | 69 30 3a 3d 28 69 2d 31 |[i,j] = |i0:=(i-1|
|00000280| 29 2a 73 6c 69 64 65 2c | 0d 20 20 20 20 20 20 70 |)*slide,|.      p|
|00000290| 77 72 73 70 65 63 28 73 | 69 67 6e 61 6c 5b 69 30 |wrspec(s|ignal[i0|
|000002a0| 2b 31 3a 69 30 2b 77 69 | 6e 64 6f 77 5d 29 20 77 |+1:i0+wi|ndow]) w|
|000002b0| 68 65 6e 20 6a 3d 31 2c | 2c 0d 20 20 20 20 20 20 |hen j=1,|,.      |
|000002c0| 74 72 61 6e 73 66 6f 72 | 6d 5b 6a 5d 20 20 20 20 |transfor|m[j]    |
|000002d0| 64 69 6d 5b 63 6f 75 6e | 74 28 73 69 67 6e 61 6c |dim[coun|t(signal|
|000002e0| 29 2f 73 6c 69 64 65 2c | 77 69 6e 64 6f 77 2f 32 |)/slide,|window/2|
|000002f0| 2b 31 5d 0d 0d 77 69 6e | 64 6f 77 3d 36 34 20 20 |+1]..win|dow=64  |
|00000300| 20 20 2d 2d 20 6d 75 73 | 74 20 62 65 20 61 20 70 |  -- mus|t be a p|
|00000310| 6f 77 65 72 20 6f 66 20 | 32 0d 73 6c 69 64 65 3a |ower of |2.slide:|
|00000320| 3d 74 72 75 6e 63 28 77 | 69 6e 64 6f 77 2f 34 29 |=trunc(w|indow/4)|
|00000330| 3a 0d 2d 2d 20 73 68 6f | 77 20 77 69 6e 64 6f 77 |:.-- sho|w window|
|00000340| 20 61 6e 64 20 73 6c 69 | 64 65 20 74 69 6d 65 20 | and sli|de time |
|00000350| 6f 6e 20 73 69 67 6e 61 | 6c 20 70 6c 6f 74 0d 70 |on signa|l plot.p|
|00000360| 6c 6f 74 6c 69 6e 65 20 | 7b 7b 30 2c 77 69 6e 64 |lotline |{{0,wind|
|00000370| 6f 77 2a 64 74 7d 2c 7b | 2d 2e 39 33 2c 2d 2e 39 |ow*dt},{|-.93,-.9|
|00000380| 33 7d 7d 20 2d 2d 7b 7b | 78 31 2c 78 32 7d 2c 7b |3}} --{{|x1,x2},{|
|00000390| 79 31 2c 79 32 7d 7d 0d | 70 6c 6f 74 6c 69 6e 65 |y1,y2}}.|plotline|
|000003a0| 20 7b 7b 73 6c 69 64 65 | 2c 73 6c 69 64 65 2b 77 | {{slide|,slide+w|
|000003b0| 69 6e 64 6f 77 7d 2a 64 | 74 2c 7b 2d 2e 39 2c 2d |indow}*d|t,{-.9,-|
|000003c0| 2e 39 7d 7d 0d 0d 6e 65 | 77 61 78 69 73 0d 5a 6d |.9}}..ne|waxis.Zm|
|000003d0| 69 6e 3d 30 3b 20 5a 6d | 61 78 3d 2e 33 0d 59 6d |in=0; Zm|ax=.3.Ym|
|000003e0| 69 6e 3a 3d 2d 31 2f 28 | 77 69 6e 64 6f 77 2a 64 |in:=-1/(|window*d|
|000003f0| 74 29 3a 3b 20 59 6d 61 | 78 3a 3d 31 2f 28 32 2a |t):; Yma|x:=1/(2*|
|00000400| 64 74 29 3a 3b 20 59 6c | 61 62 65 6c 3a 3d 22 20 |dt):; Yl|abel:=" |
|00000410| 20 48 7a 22 3a 0d 69 6d | 61 67 65 20 20 73 70 65 | Hz":.im|age  spe|
|00000420| 63 74 28 73 69 67 6e 61 | 6c 2c 77 69 6e 64 6f 77 |ct(signa|l,window|
|00000430| 2c 73 6c 69 64 65 29 0d | 0d 2d 2d 20 4e 6f 74 65 |,slide).|.-- Note|
|00000440| 20 74 68 61 74 20 77 68 | 65 6e 20 74 68 65 20 77 | that wh|en the w|
|00000450| 69 6e 64 6f 77 20 69 73 | 20 6d 6f 76 65 64 20 62 |indow is| moved b|
|00000460| 79 20 6c 65 73 73 20 74 | 68 61 6e 20 69 74 73 20 |y less t|han its |
|00000470| 77 69 64 74 68 20 74 68 | 65 20 6c 61 73 74 20 66 |width th|e last f|
|00000480| 65 77 20 73 70 65 63 74 | 72 61 20 77 69 6c 6c 20 |ew spect|ra will |
|00000490| 62 65 20 75 6e 64 65 66 | 69 6e 65 64 20 62 65 63 |be undef|ined bec|
|000004a0| 61 75 73 65 20 74 68 65 | 72 65 20 69 73 20 6e 6f |ause the|re is no|
|000004b0| 74 20 61 20 66 75 6c 6c | 20 77 69 6e 64 6f 77 20 |t a full| window |
|000004c0| 6f 66 20 64 61 74 61 20 | 61 76 61 69 6c 61 62 6c |of data |availabl|
|000004d0| 65 2e 0d 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |e.......|........|
|000004e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000004f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000500| 00 00 01 00 00 00 01 3c | 00 00 00 3c 00 00 00 52 |.......<|...<...R|
|00000510| 01 44 44 00 00 00 0c 00 | 38 00 26 00 9a 01 6c 00 |.DD.....|8.&...l.|
|00000520| 64 55 55 00 00 00 0c 00 | 28 00 28 00 75 01 28 00 |dUU.....|(.(.u.(.|
|00000530| 0b 73 70 65 63 74 72 6f | 67 72 61 6d 02 00 00 00 |.spectro|gram....|
|00000540| 54 45 58 54 4d 50 61 64 | 01 00 00 9c 00 80 00 00 |TEXTMPad|........|
|00000550| 00 00 54 45 58 54 4d 50 | 61 64 01 00 00 9c 00 80 |..TEXTMP|ad......|
|00000560| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000570| 00 00 ac 10 9c c7 00 00 | 04 53 00 00 01 8e 50 61 |........|.S....Pa|
|00000580| 64 5f 00 00 00 17 00 28 | 00 f8 01 54 01 fe 00 08 |d_.....(|...T....|
|00000590| 00 00 01 00 00 00 00 01 | 04 50 4c 4f 54 00 00 00 |........|.PLOT...|
|000005a0| fc 00 82 00 00 00 00 00 | 00 00 00 ff fb bd 7b 04 |........|......{.|
|000005b0| 45 64 69 74 04 55 6e 64 | 6f 00 5a 00 00 01 2d 00 |Edit.Und|o.Z...-.|
|000005c0| 00 00 00 03 43 75 74 00 | 58 00 00 04 43 6f 70 79 |....Cut.|X...Copy|
|000005d0| 00 43 00 00 05 50 61 73 | 74 65 00 56 00 00 05 43 |.C...Pas|te.V...C|
|000005e0| 6c 65 61 72 00 00 00 00 | 01 2d 00 00 00 00 0a 53 |lear....|.-.....S|
|000005f0| 65 6c 65 63 74 20 41 6c | 6c 00 41 00 00 01 2d 00 |elect Al|l.A...-.|
|00000600| 00 00 00 20 02 00 00 03 | 00 02 3f f9 8e fa 35 12 |... ....|..?...5.|
|00000610| 94 e9 c8 ae 01 71 01 a6 | 00 04 00 27 01 04 01 7b |.....q..|...'...{|
|00000620| 01 74 00 28 00 00 00 14 | 00 00 06 4d 6f 6e 61 63 |.t.(....|...Monac|
|00000630| 6f 01 39 06 4d 6f 6e 61 | 63 6f 01 39 00 00 01 00 |o.9.Mona|co.9....|
|00000640| 00 00 01 3c 00 00 00 3c | 00 00 00 52 01 49 25 f8 |...<...<|...R.I%.|
|00000650| 0d f6 00 00 00 1c 00 46 | 00 01 50 52 65 66 00 00 |.......F|..PRef..|
|00000660| 00 12 53 54 52 23 00 00 | 00 1e 00 80 ff ff 00 00 |..STR#..|........|
|00000670| 00 00 01 4c 17 c4 00 81 | 00 00 00 00 00 24 01 4c |...L....|.....$.L|
|00000680| 17 b4 0b 66 6f 6e 74 20 | 26 20 73 69 7a 65 00 00 |...font |& size..|
|00000690| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000006f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
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