In the first photo, you can see the issue is the dynamic range of the BB60C bringing the noise floor up, so you might need to decrease your reference level. In the second photo, you might have your reference level set too low – it could be compression causing the artifact. But with the BB60C, there might not be a setting where it passes both close-in and wideband simultaneously, due to its limited dynamic range.
The BB60D gives you 10-20 dB of additional dynamic range, and the SP145 offers an additional 10 dB. These are our best products for spectral emission mask testing.
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