... -1000MHz, max. 1.3Ghz 2.period, totalize measure, self test 3.85dB ... F1000C:1Hz~1GHz,Max.up to 1.5GHz HC-F1000L:10Hz~1GHz,Max.up to 1.8GHzPeriod,totalize measurement self testHigh ... sensitioity:85dBV (25mVrms)Stability:±3x10-9/s8 digit LED displayGate Time:0.01s,0.1s ... , digital frequency counter, from 10Hz-1000MHz continuously variable, max. 1.3GHz