How do I track a peak?

Spectrum Analyzer peak tracking using the iPad App

To track a peak, simply drag out a new marker from the ruler button at the bottom right corner. Track multiple peaks on a single channel by dragging markers directly to the peaks you want. The Measurements Panel is also marker-aware. Make measurements based on a marker’s characteristics such as amplitude, frequency, 3 dB width and SNR, or even the difference between markers. Swipe up from the measurement area to reveal the measurement history, a powerful enhancement to conventional zero-span measurements.