I can't see spectrograph

[Gary Turner]

My display shows the RTA, the oscilloscope, and 12 buttons. When I press Menu, one choice is Slow Spectrograph, but when I press it, the display doesn't change. Menu again now allows Fast Spectrograph, but still no display change. Men Show Waterfall also has no effect on the display.

[Julian Bunn]

You change the mode by pressing the button that is showing, e.g. "1/3 Octave". This button cycles through all the different display modes.

Hope this helps.

Julian

[Tim Simmons]

Hi,

Totally new to using this app and am straining my tiny brain to work out whether calibrating DB would help the accuracy of the RT measurements? I take it I cannot calibrate RT directly?

Thanks

Tim

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[Julian Bunn]

You can buy an SPL calibrator like this: https://www.amazon.com/Sound-Acoustical-Calibrator-output-levels/dp/B01FFI2OAU

but normally people are not that bothered by absolute SPL measurements, more by the relative levels as a function of frequency, which is why using a calibrated microphone is good.

Julian