09-01-2013, 09:01 PM
Every radio will be different, Some have a ratio detector, others have a discriminator and the 48-482 has a quadrature detector. Each will require a different connection for the scope.
To sweep the IF the best place to connect the sweeper is the grid of the mixer tube, for the detector the grid of the limiter or last IF stage.
Let me know the models you are working on and a link to the schematics, and I can give you a better idea of the connections.
Glad you received the generator in one piece and it works. You can check the sweep function by connecting your counter to the aux output and using the manual sweep function. For example set the generator to symmetrical sweep, freq to 5 MHz and sweep width to 1 MHz. When you turn the manual knob from end to end, the freq should vary from 4.5 to 5.5 MHz. Switching to slow sweep should do the same thing automatically but you need to set the sweep slow enough so you can follow the variation on the counter.
To sweep the IF the best place to connect the sweeper is the grid of the mixer tube, for the detector the grid of the limiter or last IF stage.
Let me know the models you are working on and a link to the schematics, and I can give you a better idea of the connections.
Glad you received the generator in one piece and it works. You can check the sweep function by connecting your counter to the aux output and using the manual sweep function. For example set the generator to symmetrical sweep, freq to 5 MHz and sweep width to 1 MHz. When you turn the manual knob from end to end, the freq should vary from 4.5 to 5.5 MHz. Switching to slow sweep should do the same thing automatically but you need to set the sweep slow enough so you can follow the variation on the counter.
