all points y value undefined!

[IT-Berater]

Hi,

compile and link works fine. No output, see:

rtl_map -f 109000000 [18:48:25] INFO Starting rtl_map ~ [18:48:25] INFO Found 1 device(s): [18:48:25] INFO #0: Generic RTL2832U OEM Found Rafael Micro R820T tuner [18:48:25] INFO Using device: #0 [18:48:25] INFO Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 [18:48:25] INFO Gain set to 2.7 [18:48:25] INFO Center frequency set to 109000000 Hz. [18:48:25] INFO Sampling at 2048000 S/s Allocating 15 zero-copy buffers [18:48:26] INFO Creating FFT graph from samples using gnuplot... [18:48:26] INFO Done, exiting... Warning: empty x range [-1.04858e+06:-1.04858e+06], adjusting to [-1.05906e+06:-1.03809e+06]

gnuplot> plot '-' smooth frequency with linespoints lt -1 notitle ^ line 513: all points y value undefined!

This is the capture.dat

cat capture.dat 1 21.548365 2 6.276362 3 9.542425 4 10.146918 5 10.979499 6 8.996703 7 9.978176 8 9.672492 9 10.635524 10 11.662192 11 9.064567 12 5.000000 13 10.322289 14 9.064567 15 9.956130 16 10.865932 17 9.130374 18 0.000000 19 10.993285 20 4.771213 21 8.010300 22 5.000000 23 6.989700 24 7.592570 25 6.276362 26 2.385606 27 3.494850 28 -inf 29 5.000000 30 5.395906 31 5.880456 32 6.989700 33 9.404068 34 8.854260 35 7.841009 36 7.456809 37 3.494850 38 5.880456 39 5.395906 40 6.276362 41 7.841009 42 6.393768 43 7.385606 44 6.505150 45 3.494850 46 3.890756 47 8.217263 48 4.515450 49 4.225490 50 5.395906 51 3.890756 52 2.385606 53 2.385606 54 2.385606 55 -inf 56 1.505150 57 3.010300 58 0.000000 59 2.385606 60 -inf 61 -inf 62 -inf 63 -inf 64 -inf 65 -inf 66 -inf 67 -inf 68 -inf 69 -inf 70 0.000000 71 -inf 72 -inf 73 0.000000 74 -inf 75 5.206964 76 3.890756 77 3.494850 78 6.276362 79 6.712113 80 -inf 81 3.494850 82 5.395906 83 -inf 84 4.225490 85 2.385606 86 7.898918 87 4.771213 88 7.156819 89 8.961958 90 7.156819 91 5.569717 92 7.781513 93 6.020600 94 11.215190 95 7.592570 96 5.395906 97 -inf 98 6.808640 99 8.450980 100 11.439009 101 5.395906 102 8.010300 103 11.682299 104 10.226615 105 9.595390 106 6.611096 107 10.021606 108 5.395906 109 8.406206 110 10.064186 111 4.515450 112 11.882885 113 8.313789 114 10.865932 115 12.235790 116 10.043000 117 11.505150 118 6.901056 119 -inf 120 10.894885 121 4.225490 122 8.116246 123 12.442754 124 10.894885 125 9.194245 126 5.569717 127 10.226615 128 13.251537 129 12.644584 130 13.360489 131 10.431799 132 5.880456 133 9.621396 134 11.416506 135 13.079750 136 8.854260 137 5.000000 138 11.864560 139 -inf 140 8.116246 141 12.799533 142 11.472331 143 13.764082 144 12.512136 145 10.085167 146 13.760242 147 6.611096 148 12.180813 149 10.635524 150 7.781513 151 12.505296 152 9.316614 153 12.334338 154 13.085002 155 14.672492 156 11.177642 157 8.854260 158 14.833055 159 12.041200 160 10.569716 161 3.890756 162 9.542425 163 11.827440 164 15.522435 165 10.667694 166 12.484648 167 10.431799 168 12.258932 169 14.191096 170 12.612221 171 10.536050 172 13.721465 173 8.890757 174 10.602870 175 0.000000 176 12.421499 177 10.806840 178 6.611096 179 14.395479 180 14.280622 181 11.989700 182 12.887459 183 14.561110 184 7.156819 185 10.635524 186 2.385606 187 10.937604 188 13.653912 189 6.989700 190 0.000000 191 8.116246 192 7.781513 193 10.322289 194 10.761441 195 11.692283 196 12.714128 197 4.515450 198 9.865640 199 13.993253 200 12.799533 201 13.464234 202 11.928031 203 9.346159 204 11.882885 205 11.537480 206 10.993285 207 11.721961 208 12.846869 209 11.370790 210 11.312256 211 14.756688 212 10.536050 213 10.064186 214 12.400035 215 13.031907 216 11.864560 217 13.069209 218 11.324089 219 10.467109 220 10.651669 221 8.313789 222 11.760913 223 12.007003 224 12.835132 225 13.266063 226 10.715075 227 9.432453 228 8.926649 229 8.313789 230 1.505150 231 6.808640 232 5.395906 233 9.097720 234 10.246090 235 9.542425 236 7.657394 237 10.265392 238 6.901056 239 12.982985 240 2.385606 241 10.894885 242 12.512136 243 11.494266 244 10.519018 245 11.631680 246 6.393768 247 10.146918 248 12.631697 249 11.494266 250 10.413927 251 10.651669 252 9.542425 253 11.416506 254 10.467109 255 9.746950 256 6.393768 257 21.548365 258 6.276362 259 9.542425 260 10.146918 261 10.979499 262 8.996703 263 9.978176 264 9.672492 265 10.635524 266 11.662192 267 9.064567 268 5.000000 269 10.322289 270 9.064567 271 9.956130 272 10.865932 273 9.130374 274 0.000000 275 10.993285 276 4.771213 277 8.010300 278 5.000000 279 6.989700 280 7.592570 281 6.276362 282 2.385606 283 3.494850 284 -inf 285 5.000000 286 5.395906 287 5.880456 288 6.989700 289 9.404068 290 8.854260 291 7.841009 292 7.456809 293 3.494850 294 5.880456 295 5.395906 296 6.276362 297 7.841009 298 6.393768 299 7.385606 300 6.505150 301 3.494850 302 3.890756 303 8.217263 304 4.515450 305 4.225490 306 5.395906 307 3.890756 308 2.385606 309 2.385606 310 2.385606 311 -inf 312 1.505150 313 3.010300 314 0.000000 315 2.385606 316 -inf 317 -inf 318 -inf 319 -inf 320 -inf 321 -inf 322 -inf 323 -inf 324 -inf 325 -inf 326 0.000000 327 -inf 328 -inf 329 0.000000 330 -inf 331 5.206964 332 3.890756 333 3.494850 334 6.276362 335 6.712113 336 -inf 337 3.494850 338 5.395906 339 -inf 340 4.225490 341 2.385606 342 7.898918 343 4.771213 344 7.156819 345 8.961958 346 7.156819 347 5.569717 348 7.781513 349 6.020600 350 11.215190 351 7.592570 352 5.395906 353 -inf 354 6.808640 355 8.450980 356 11.439009 357 5.395906 358 8.010300 359 11.682299 360 10.226615 361 9.595390 362 6.611096 363 10.021606 364 5.395906 365 8.406206 366 10.064186 367 4.515450 368 11.882885 369 8.313789 370 10.865932 371 12.235790 372 10.043000 373 11.505150 374 6.901056 375 -inf 376 10.894885 377 4.225490 378 8.116246 379 12.442754 380 10.894885 381 9.194245 382 5.569717 383 10.226615 384 13.251537 385 12.644584 386 13.360489 387 10.431799 388 5.880456 389 9.621396 390 11.416506 391 13.079750 392 8.854260 393 5.000000 394 11.864560 395 -inf 396 8.116246 397 12.799533 398 11.472331 399 13.764082 400 12.512136 401 10.085167 402 13.760242 403 6.611096 404 12.180813 405 10.635524 406 7.781513 407 12.505296 408 9.316614 409 12.334338 410 13.085002 411 14.672492 412 11.177642 413 8.854260 414 14.833055 415 12.041200 416 10.569716 417 3.890756 418 9.542425 419 11.827440 420 15.522435 421 10.667694 422 12.484648 423 10.431799 424 12.258932 425 14.191096 426 12.612221 427 10.536050 428 13.721465 429 8.890757 430 10.602870 431 0.000000 432 12.421499 433 10.806840 434 6.611096 435 14.395479 436 14.280622 437 11.989700 438 12.887459 439 14.561110 440 7.156819 441 10.635524 442 2.385606 443 10.937604 444 13.653912 445 6.989700 446 0.000000 447 8.116246 448 7.781513 449 10.322289 450 10.761441 451 11.692283 452 12.714128 453 4.515450 454 9.865640 455 13.993253 456 12.799533 457 13.464234 458 11.928031 459 9.346159 460 11.882885 461 11.537480 462 10.993285 463 11.721961 464 12.846869 465 11.370790 466 11.312256 467 14.756688 468 10.536050 469 10.064186 470 12.400035 471 13.031907 472 11.864560 473 13.069209 474 11.324089 475 10.467109 476 10.651669 477 8.313789 478 11.760913 479 12.007003 480 12.835132 481 13.266063 482 10.715075 483 9.432453 484 8.926649 485 8.313789 486 1.505150 487 6.808640 488 5.395906 489 9.097720 490 10.246090 491 9.542425 492 7.657394 493 10.265392 494 6.901056 495 12.982985 496 2.385606 497 10.894885 498 12.512136 499 11.494266 500 10.519018 501 11.631680 502 6.393768 503 10.146918 504 12.631697 505 11.494266 506 10.413927 507 10.651669 508 9.542425 509 11.416506 510 10.467109 511 9.746950 512 6.393768

[IT-Berater]

What ist -inf in capture.dat?

[orhun]

It's about fftw3 library. Still working on that. Can you try it with -M parameter?

[orhun]

Also please see https://github.com/KeyLo99/rtl_map/issues/2#issuecomment-460003536 about this issue.

[IT-Berater]

I have only a headless Raspberry Pi without display. I will build a gnugraph from file.

rtl_map -f 109000000 -M [19:07:55] INFO Starting rtl_map ~ [19:07:55] INFO Found 1 device(s): [19:07:55] INFO #0: Generic RTL2832U OEM Found Rafael Micro R820T tuner [19:07:56] INFO Using device: #0 [19:07:56] INFO Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 [19:07:56] INFO Gain set to 2.7 [19:07:56] INFO Center frequency set to 109000000 Hz. [19:07:56] INFO Sampling at 2048000 S/s Allocating 15 zero-copy buffers [19:07:56] INFO Creating FFT graph from samples using gnuplot... [19:07:56] INFO Done, exiting... Warning: empty x range [2.14644e+09:2.14644e+09], adjusting to [2.12497e+09:2.1679e+09] Warning: empty y range [0:0], adjusting to [-1:1] QXcbConnection: Could not connect to display

[orhun]

Okay, it looks like fftw3 library is not working well. (-inf values or empty x and y ranges.) Did you check FFTW_MEASURE parameter in code? Which version of rtl_map are you using?

[IT-Berater]

No Version String (rtl_map -h) found:

rtl_map -h rtl_map, a FFT-based visualizer for RTL-SDR devices. (RTL2832/DVB-T)

Usage: [-d device index (default: 0)] [-s sample rate (default: 2048000 Hz)] [-f center frequency (Hz)] * [-g gain (0 for auto) (default: ~1-3)] [-r refresh rate for -C read (default: 500ms)] [-D don't show gnuplot graph (default: show)] [-C continuously read samples (default: off)] [-M show magnitude graph (default graph: dB)] [-O disable offset tuning (default: on)] [-T turn off log colors (default: on)] [-h show this help message and exit] [filename (a '-' dumps samples to stdout)]

[IT-Berater]

I have the sourcecode status of today.

[IT-Berater]

echo $FFTW_MEASURE is ""

[orhun]

I was talking about https://github.com/KeyLo99/rtl_map/blob/master/rtl_map.c#L360

[orhun]

If the code is up-to-date, everything looks fine actually. You might try to fix it with uninstalling and installing fftw lib or trying a different usb port. I'm definitely gonna check this issue within a few hours. Please keep me updated!

[IT-Berater]

I try a different usb port, in line 17 and others are -inf ...

tl_map -f 109000000 -D - [19:49:59] INFO Starting rtl_map ~ [19:49:59] INFO Found 1 device(s): [19:49:59] INFO #0: Generic RTL2832U OEM Found Rafael Micro R820T tuner [19:50:00] INFO Using device: #0 [19:50:00] INFO Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 [19:50:00] INFO Gain set to 2.7 [19:50:00] INFO Center frequency set to 109000000 Hz. [19:50:00] INFO Sampling at 2048000 S/s Allocating 15 zero-copy buffers [19:50:00] INFO Reading samples... 1 21.282387 2 9.672492 3 11.359208 4 10.806840 5 11.590317 6 6.020600 7 12.220224 8 5.880456 9 12.498435 10 7.525750 11 12.938555 12 7.311990 13 8.313789 14 2.385606 15 12.726536 16 9.488135 17 -inf 18 5.395906 19 3.494850 20 10.993285 21 11.347565 22 6.808640 ... 48 5.000000 49 3.010300 50 4.771213 51 -inf 52 1.505150 53 -inf 54 4.225490 55 2.385606 56 -inf 57 3.890756 58 1.505150 59 0.000000 60 -inf 61 -inf 62 -inf 63 -inf 64 -inf 65 -inf 66 -inf 67 -inf 68 -inf 69 1.505150 70 0.000000 71 1.505150 72 2.385606 73 1.505150 74 3.010300 75 1.505150 ...

[orhun]

Like I said it's a common problem with fftw. -M param will create magnitude graph from samples. So 0 value would not be a problem with gnuplot for now...

[IT-Berater]

Ok, thanks, -M Parameter works fine:

rtl_map -M -f 109000000 -D capture-1090.dat [20:14:49] INFO Starting rtl_map ~ [20:14:49] INFO Found 1 device(s): [20:14:49] INFO #0: Generic RTL2832U OEM Found Rafael Micro R820T tuner [20:14:50] INFO Using device: #0 [20:14:50] INFO Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 [20:14:50] INFO Gain set to 2.7 [20:14:50] INFO Center frequency set to 109000000 Hz. [20:14:50] INFO Sampling at 2048000 S/s Allocating 15 zero-copy buffers [20:14:50] INFO Reading samples... [20:14:50] INFO Done, exiting... pi@pi-home:~ $ cat capture-1090.dat 1 116.674759 2 11.090536 3 7.810250 4 5.744563 5 12.369317 6 12.845233 7 12.609520 8 4.582576 9 5.916080 10 10.677078 11 10.344080 12 2.000000 13 21.954498 14 10.954452 15 8.246211 16 5.656854 17 17.888544 18 14.247807 19 6.000000 20 10.583005 21 7.874008 22 9.643651 23 7.810250 24 3.162278 25 2.236068 26 10.000000 27 12.288206 28 5.477226 29 6.633250 30 14.764823 31 2.645751 32 5.196152 33 7.280110 34 9.539392 35 12.569805 36 5.830952 37 4.242640 38 10.295630 39 2.828427 40 7.000000 41 2.000000 42 9.165152 43 7.615773 44 4.472136 45 5.196152 46 0.000000 47 7.000000 48 3.741657 49 5.196152 50 1.414214 51 0.000000 52 1.000000 53 0.000000 54 1.732051 55 0.000000 56 1.732051 57 0.000000 58 1.414214 59 0.000000 60 1.414214 61 1.414214 62 1.000000 63 1.414214 64 1.000000 65 1.000000 66 0.000000 67 0.000000 68 1.000000 69 0.000000 70 1.000000 71 1.414214 72 1.732051 73 1.732051 74 1.414214 75 2.828427 76 0.000000 77 3.872983 78 3.872983 79 1.000000 80 2.000000 81 2.000000 82 4.123106 83 1.000000 84 1.000000 85 0.000000 86 2.449490 87 2.000000 88 2.449490 89 4.795832 90 6.708204 91 5.656854 92 5.656854 93 4.358899 94 4.582576 95 7.810250 96 4.898980 97 3.741657 98 6.244998 99 7.483315 100 4.242640 101 5.830952 102 8.366600 103 7.071068 104 7.141428 105 13.038404 106 7.071068 107 1.732051 108 10.000000 109 7.000000 110 9.797959 111 10.344080 112 11.313708 113 18.466185 114 6.244998 115 2.449490 116 7.483315 117 8.306623 118 14.177447 119 9.433981 120 13.820275 121 10.198039 122 5.656854 123 0.000000 124 15.684387 125 6.782330 126 8.774964 127 25.337719 128 6.164414 129 5.000000 130 4.898980 131 27.982138 132 9.000000 133 8.366600 134 17.000000 135 0.000000 136 7.937254 137 11.269427 138 16.522711 139 13.490738 140 17.029387 141 9.695360 142 8.888194 143 5.385165 144 9.848858 145 29.342802 146 17.320509 147 17.521416 148 14.899665 149 11.445523 150 15.556349 151 5.291502 152 13.784049 153 26.495283 154 11.789826 155 16.155495 156 15.165751 157 13.000000 158 11.532562 159 14.798649 160 12.727922 161 11.445523 162 9.591663 163 20.024984 164 14.730920 165 14.662878 166 15.874508 167 14.832397 168 23.366642 169 14.966630 170 9.695360 171 5.291502 172 8.888194 173 2.828427 174 6.928203 175 10.295630 176 25.000000 177 9.055386 178 10.295630 179 1.732051 180 24.494898 181 19.697716 182 7.681146 183 17.606817 184 13.228757 185 19.467922 186 23.600847 187 12.083046 188 0.000000 189 26.981476 190 2.645751 191 13.453624 192 5.196152 193 3.605551 194 10.148891 195 19.849434 196 3.000000 197 21.260292 198 12.328828 199 8.062258 200 7.416198 201 14.035668 202 8.485281 203 16.248077 204 6.244998 205 6.557438 206 12.529964 207 3.872983 208 14.456832 209 25.748787 210 15.905973 211 26.683329 212 8.426149 213 21.377558 214 19.748417 215 25.317978 216 30.347982 217 4.472136 218 19.339079 219 9.000000 220 29.478806 221 15.099669 222 14.035668 223 30.838287 224 25.039968 225 15.297058 226 11.661903 227 7.280110 228 30.099834 229 16.462078 230 9.797959 231 26.172504 232 20.688160 233 6.480741 234 6.633250 235 11.958261 236 15.099669 237 12.961481 238 19.104973 239 11.445523 240 20.099751 241 26.645824 242 9.000000 243 13.266500 244 16.093477 245 28.035692 246 3.605551 247 14.212670 248 12.409674 249 8.831760 250 4.000000 251 13.784049 252 12.961481 253 12.165525 254 5.000000 255 9.695360 256 11.135529 257 116.674759 258 11.090536 259 7.810250 260 5.744563 261 12.369317 262 12.845233 263 12.609520 264 4.582576 265 5.916080 266 10.677078 267 10.344080 268 2.000000 269 21.954498 270 10.954452 271 8.246211 272 5.656854 273 17.888544 274 14.247807 275 6.000000 276 10.583005 277 7.874008 278 9.643651 279 7.810250 280 3.162278 281 2.236068 282 10.000000 283 12.288206 284 5.477226 285 6.633250 286 14.764823 287 2.645751 288 5.196152 289 7.280110 290 9.539392 291 12.569805 292 5.830952 293 4.242640 294 10.295630 295 2.828427 296 7.000000 297 2.000000 298 9.165152 299 7.615773 300 4.472136 301 5.196152 302 0.000000 303 7.000000 304 3.741657 305 5.196152 306 1.414214 307 0.000000 308 1.000000 309 0.000000 310 1.732051 311 0.000000 312 1.732051 313 0.000000 314 1.414214 315 0.000000 316 1.414214 317 1.414214 318 1.000000 319 1.414214 320 1.000000 321 1.000000 322 0.000000 323 0.000000 324 1.000000 325 0.000000 326 1.000000 327 1.414214 328 1.732051 329 1.732051 330 1.414214 331 2.828427 332 0.000000 333 3.872983 334 3.872983 335 1.000000 336 2.000000 337 2.000000 338 4.123106 339 1.000000 340 1.000000 341 0.000000 342 2.449490 343 2.000000 344 2.449490 345 4.795832 346 6.708204 347 5.656854 348 5.656854 349 4.358899 350 4.582576 351 7.810250 352 4.898980 353 3.741657 354 6.244998 355 7.483315 356 4.242640 357 5.830952 358 8.366600 359 7.071068 360 7.141428 361 13.038404 362 7.071068 363 1.732051 364 10.000000 365 7.000000 366 9.797959 367 10.344080 368 11.313708 369 18.466185 370 6.244998 371 2.449490 372 7.483315 373 8.306623 374 14.177447 375 9.433981 376 13.820275 377 10.198039 378 5.656854 379 0.000000 380 15.684387 381 6.782330 382 8.774964 383 25.337719 384 6.164414 385 5.000000 386 4.898980 387 27.982138 388 9.000000 389 8.366600 390 17.000000 391 0.000000 392 7.937254 393 11.269427 394 16.522711 395 13.490738 396 17.029387 397 9.695360 398 8.888194 399 5.385165 400 9.848858 401 29.342802 402 17.320509 403 17.521416 404 14.899665 405 11.445523 406 15.556349 407 5.291502 408 13.784049 409 26.495283 410 11.789826 411 16.155495 412 15.165751 413 13.000000 414 11.532562 415 14.798649 416 12.727922 417 11.445523 418 9.591663 419 20.024984 420 14.730920 421 14.662878 422 15.874508 423 14.832397 424 23.366642 425 14.966630 426 9.695360 427 5.291502 428 8.888194 429 2.828427 430 6.928203 431 10.295630 432 25.000000 433 9.055386 434 10.295630 435 1.732051 436 24.494898 437 19.697716 438 7.681146 439 17.606817 440 13.228757 441 19.467922 442 23.600847 443 12.083046 444 0.000000 445 26.981476 446 2.645751 447 13.453624 448 5.196152 449 3.605551 450 10.148891 451 19.849434 452 3.000000 453 21.260292 454 12.328828 455 8.062258 456 7.416198 457 14.035668 458 8.485281 459 16.248077 460 6.244998 461 6.557438 462 12.529964 463 3.872983 464 14.456832 465 25.748787 466 15.905973 467 26.683329 468 8.426149 469 21.377558 470 19.748417 471 25.317978 472 30.347982 473 4.472136 474 19.339079 475 9.000000 476 29.478806 477 15.099669 478 14.035668 479 30.838287 480 25.039968 481 15.297058 482 11.661903 483 7.280110 484 30.099834 485 16.462078 486 9.797959 487 26.172504 488 20.688160 489 6.480741 490 6.633250 491 11.958261 492 15.099669 493 12.961481 494 19.104973 495 11.445523 496 20.099751 497 26.645824 498 9.000000 499 13.266500 500 16.093477 501 28.035692 502 3.605551 503 14.212670 504 12.409674 505 8.831760 506 4.000000 507 13.784049 508 12.961481 509 12.165525 510 5.000000 511 9.695360 512 11.135529

[IT-Berater]

My first Map:

[orhun]

That's nice :+1:

[IT-Berater]

Here the gnuplot script:

set title "Frequenzdiagramm mit rtl-map" set ylabel "Amplitude (dB)" set xlabel "Messungen mitFrequenz 1090 Mhz" set terminal png set xrange [0:500] set output "capture-1090.png" plot "capture-1090.dat" using 1:2 title "rtl Sensor" with lines

[IT-Berater]