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max, 04/22/2017 04:04 PM
= Signal Scope =
InstallationBefore running the scope app, check that the following packages are also installed: * GNU Radio * The op25 blocks * Frank's gr-fsk4 block * The op25 repeater block
Other than these pre-requisites, no special setup or installation is needed.
There are two overall options depending on your hardware (USRP or disc-tap).
Running with the disc-tap optionThe signal scope does not require the USRP. If you have a discriminator-tapped receiver, use the "-a" option:
{{{
./scope.py -a -v 25
}}}
It's helpful to find out the current calibration error beforehand (I use kalibrate), for example, +1234 hertz:
{{{
./scope.py -f 412.34e6 -RA -g 65 -c 1234 -v 25
}}}
In USRP mode, several additional program functions are enabled (spectrum FFT, constellation diagram, PSK demod, and iDEN correlation).
Updated by max about 7 years ago · 3 revisions