Done a bit more investigation. I found that it seems to be the bottom end of the sweep that causes an issue. With the sweep set at 10Hz - 500MHz it will sit there quite happily indefinitely, and functions absolutely fine. With the sweep set at 5Hz - 500MHz then it doesn't take very long before I get the input overload error.?
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I checked source power is set to 0dBm and the problem occurs across all 3 inputs.?
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