Reference 15
InfiniiVision Oscilloscopes User’s Guide 407
A black locked padlock icon will appear at the top of the display.
If the externally supplied sample clock varies greater than 0.5% from 10 MHz a soft
unlock will occur. The oscilloscope will continue to acquire data but the lock symbol in
the upper right part of the display will become a red unlocked padlock icon.
If the externally supplied sample clock signal is lost, a hard unlock will occur. The lock
symbol in the upper right part of the display will become a red unlocked padlock icon and
the oscilloscope will stop acquiring data. The oscilloscope will resume sampling when
the externally supplied sample clock becomes stable again.
Reference signal locked
10 MHz input mode selected
10 MHz unlock icon and system stopped