Frequency Counter SS7301 SS7301 Frequency Counter has the measurement function of frequency, period, frequency ratio, etc., also with the measurement computing function such as multiple average, maximum, minimum, standard deviation, Allan Variance, a single relative deviation FEATURES High accuracy with minimum measuring resolution 10 digits/s 16-bit microcontroller is used and the speed of data processing is fast. Maximum frequencyâ??s measurement can reach to 16GHz (options) Utility statistics functions of multi-average, maximum, minimum, PPM, standard deviation and Allan Variance for frequency measurement High-stability crystal oscillator is optional SPECIFICATIONS SS7301 Measuring Functions Frequency CH 1:  0.001Hz ~ 200MHz CH 2:  options 3GHz/6.5GHz CH 3:  options 3GHz/6.5GHz/12.4GHz/16GHz Measurement Resolution 10 digits/s Period 5ns ~ 1000s Pulse Width 50ns ~ 1000s Duty Cycle 1% ~ 99% Totalize 0 ~ 1Ã?1013 Input Dynamic Range 50mVrms ~ 1.0Vrms (Sine), 150mVPP ~ 4.5VPP(Pulse) Input Impedance 1MΩ//35pF or 50Ω Coupling Mode AC or DC Trigger Mode Rising edge or Falling edge Input Attenuation Ã?1 or Ã?10 Low-pass Filter stop frequency approx.100kHz Trigger Level -5.000V ~ +5.000V, step 5mV Other Functions Frequency Ratio â?? Frequency Self-test â?? Up/Low Limit "Limit" light on shows the result out of range, off   shows within range Statistics Calculation Multi-average, Max.,Min., PPM, SD, Allan Variance Standard Time Base Accuracy 5Ã?10-8 Daily Aging 1Ã?10-8/day Optional Time Base Accuracy 5Ã?10-8 Daily Aging 5Ã?10-10/day General   Characteristics Interface Standard: USB, RS-232 Optional: GPIB Power AC 100 ~ 240V, 45 ~ 65Hz, < 35VA Dimension & Weight 375Ã?105Ã?235mm, Approx. 3.7kg