It measures signals over a wide range from 0.01 Hz to 2.4 GHz. The gate time is continuously varying from 100ms to 10s. It has a constant compensation for temperature change is provided by a crystal-controlled temperature circuit, thus reducing measurement errors typically caused by temperature drift and all functions depends on a single CPU. The Channel B (CH. B) input has an attenuator (x1, x20), AC/DC coupling for a low-pass filter. Moreover, it passed the necessary testing of TüV ISO9001:2000 for safety and quality. Special Features *Frequency, period and equal-precision measuring *3 step function selections : Work state, Unit and 8-Digit LED display *Accurate & high resolution Specifications *8 digit LED display *3 step function selections *Channel B (CH. B) input has an attenuator (x1, x20) *AC/DC coupling for low-pass filter *All functions depend on a single CPU *Crystal-controlled temperature circuit *2 Input Channels : Channel A for 0.01 Hz to 50 MHz ; Channel B for 50 MHz to 2.4 GHz *Channel A (0.01Hz to 50 MHz) *Frequency range : DC couple 0.01 Hz to 100 Hz ; AC couple 100 Hz to 50 MHz *Sensitivity : *"DC" 0.01 Hz - 1 Hz = 500m Vp-p , 1 Hz - 100Hz = 80m Vrms *"AC" 100 Hz - 50 M Hz = 80m Vrms *Input impedance : 1 MO *Channel B (50 MHz to 2.4 GHz) *Frequency : 50 MHz - 2.4 GHz *Sensitivity : *50 MHz - 1.2 GHz = 80m Vrms *1.2 GHz - 2.4 GHz > 80m Vrms *Coupling : AC only *Input Impedance : 50O *Resolution depends on gate time control setting *Time base: *Short time stability : ± 3 x 10-9 per second *Long time stability : ± 2 x 10-8 per month *Temperature drift coefficient : ± 1 x 10-7, 10°C - 40°C *Line voltage variation : ± 1 x 10-7 for line voltage ± 10% *Gate Time : Continously variable from 100ms to 10s *Precision : standard time error (t) x frequency (f) ±1d *Power supply : 220V *Power cord with EU plug *Preheat time : 20 minutes *Operating environment : 0°C - 50°C, 10 - 90% R.H. *Dimension : approx. 270 x 215 x 100 mm *Weight : approx. 1.6 kg Set Includes *1 x Frequency counter *1 x Power cord with EU plug *1 x Test probe with BNC type connector *1 x English user manual *Standard factory box