Precision Frequency Counter (0.01Hz to 2.4GHz, 110V & 220V) *****           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 The machine can switch from 110V to 220V (vise versa) 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 : Continuously variable from 100ms to 10s Precision : standard time error (t) x frequency (f) ±1d Power supply : 110V & 220V Power cord (Available for US, UK, Australian & European system) 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 (Available for US, UK, Australian & European system) 1 x Test probe with BNC type connector 1 x English user manual   Standard factory box     Copyright © 2008. All rights reserved. Discount Instrument *