Version 4
SHEET 1 1152 1480
WIRE 384 192 80 192
WIRE 688 224 528 224
WIRE 784 224 768 224
WIRE 800 224 784 224
WIRE 896 224 880 224
WIRE 80 288 80 272
WIRE 688 336 384 336
WIRE 784 336 784 224
WIRE 784 336 768 336
WIRE 784 352 784 336
WIRE 800 352 784 352
WIRE 896 368 896 224
WIRE 896 368 864 368
WIRE 992 368 896 368
WIRE 800 384 768 384
WIRE 384 416 384 336
WIRE 768 432 768 384
WIRE 384 544 384 496
FLAG 80 288 0
FLAG 384 544 0
FLAG 832 336 V+
FLAG 832 400 V-
FLAG 768 432 0
FLAG 992 368 Vout
SYMBOL SpecialFunctions\\modulate 384 192 R0
WINDOW 3 0 0 Invisible 0
SYMATTR Value mark=2125 space=2295
SYMATTR InstName A1
SYMBOL bv 384 400 R0
SYMATTR InstName B1
SYMATTR Value V=white(time*10e3)
SYMBOL Opamps\\UniversalOpamp2 832 368 R0
SYMATTR InstName U1
SYMBOL res 896 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 784 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 784 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 9e9
SYMBOL bv 80 176 R0
SYMATTR InstName B2
SYMATTR Value V=(rand(time/.022) >=.5)
TEXT 408 64 Left 2 ;AFSK Source, 2Vpp
TEXT 360 616 Left 2 ;White Noise Source, 1Vpp
TEXT 16 336 Left 2 ;Random Data Generator\n22 ms per bit.
TEXT 184 712 Left 2 !.wave "C:\\Users\\Harold_Win7\\Downloads\\Random170.wav" 16 44.1k Vout
TEXT 184 672 Left 2 !.tran 0 120 0 1
TEXT 192 776 Left 2 ;AFSK Generator\n \nThis generates a WAV file of AFSK audio with a random sequence of 22 ms bits.\nIt is used to generate Eye Diagrams to evaluate demodulator performance.\n \nSet Mark and Space frequencies in Data field of A1 by right clicking on A1. \nIntroduce white noise into the output by settinr R3.\n \nSet filename in .wave command. Parameters are filename, bits per sample,\nsamples per second, netname to output. Note that multiple netnames can be\nused resulting in a multichannel WAV file.