SignalScopePage » History » Version 3
max, 04/22/2017 04:04 PM
| 1 | 1 | max | = Signal Scope = |
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| 3 | == Installation == |
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| 5 | Before running the scope app, check that the following packages are also installed: |
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| 6 | * GNU Radio |
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| 7 | * The op25 blocks |
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| 8 | * Frank's gr-fsk4 block |
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| 9 | * The op25 repeater block |
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| 11 | Other than these pre-requisites, no special setup or installation is needed. |
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| 13 | 3 | max | There are two overall options depending on your hardware (USRP or disc-tap). |
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| 15 | 1 | max | == Running with the disc-tap option == |
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| 17 | The signal scope does not require the USRP. If you have a discriminator-tapped receiver, use the "-a" option: |
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| 18 | 3 | max | {{{ |
| 19 | ./scope.py -a -v 25 |
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| 20 | }}} |
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| 22 | == Running with the USRP == |
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| 24 | It's helpful to find out the current calibration error beforehand (I use kalibrate), for example, +1234 hertz: |
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| 25 | {{{ |
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| 26 | ./scope.py -f 412.34e6 -RA -g 65 -c 1234 -v 25 |
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| 27 | }}} |
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| 29 | In USRP mode, several additional program functions are enabled (spectrum FFT, constellation diagram, PSK demod, and iDEN correlation). |
