General purpose 20MHz dual-trace,Auto triggering,easy tu use,Sync locked,Low cost,high performance General purpose 20MHz dual-traceAuto triggering,easy tu useSync lockedLow cost,high performance DF4321C DF4351CDF4318DF4313DDF4328CRTScreen8×10cm8×10cm8×10cm5×6.5cmφ7cmFocusSelf-focusTraceHorizontalBrightneesAdjustableVerticalDCDC-20MHzDC-50MHzDC-20MHzDC-15MHzDC-20MHzAC10Hz-20MHz10Hz-50MHz10Hz- ...