Hameg Instruments HM8021- 3 Frequency Range: DC to 1.6GHz Sensitivity: 20mVRMS 7 Measuring Functions 3 Selectable Gate Times; External Gate (HO801) 8 Digit LED Display Crystal Time Base (TCXO) 5x10-7 Selectable Auto Trigger This microprocessor based instrument has built in self test as well as two high sensitivity inputs, with an extended frequency range to 1.6GHz for one of them. The reciprocal frequency measurement technique provides high resolution of low frequency signals with 7 significant digits for a 1s measurement duration. The HM8021-3 is equipped with an extremely stable temperature compensated crystal oscillator (TCXO) with a stability of 0.5 ppm over the entire operating temperature range. reconditioned