Hi I want to perform a frequency sweep with grc by sweeping the center-frequency argument of the usrp-block and generate and display a single complex-number for each value (this is for a vector-network analyzer).
What I have come up with so far, is a block that processes a fixed number of samples at a single frequency (using the head-block) and outputs these to a file. My problems: 1) Even though I can output these samples to a file using the file-sink, I only get a blank display on the scope-sink whenever I use the head-block in the signal flow. I do get "live-data" though when I remove the head-block. How can I display the results of a single pass generating say 1000-samples within grc? 2)Is there a way to change a parameter (e.g. the center frequency) after a number of samples have been processed? Thanks Wolfgang
scope.grc
Description: XML document
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