Over the last few months I've been responding to a lot of questions about Tracebook and I'd like to share some of the most common here today.
Everything that I'm going to cover is contained in the Tracebook Measurement Procedure and our Getting Started video series.
Before I get started I want to give a big shout out and thank you to everyone who has been taking measurements for Tracebook and especially Hui-Yu Huang who has been working with me diligently to solve various issues.
- Input calibration: Fresh battery in the mic calibrator. Use all of our recommended settings. Output levels must match. If reference branch input level is still too high adjust output sensitivity or use a different reference level. Signal generator level may be adjust from within your audio analyzer afterwards because that won't affect the unity state.
- Amp gain: Amplifier levels need to be documented. We realize that if a system is overpowered that you might want to decrease amplifier gain to improve SNR.
- Aim: If your VHF has a strange/steep slope up or down that deviates significantly from manufacturer documentation there may be an issue. Compare your measurement to manufacturer documentation, another Tracebook upload, or put the speaker on a stand and measure from 1m. Carpet may be a problem!
- Smaart export: Disable coherence blanking and smoothing.