Detailed Product Description

Programmable Record (MAX / MIN): Records and displays the MAX and MIN values of the input freq. 
Programmable Relative (REF / ERR): Displays Reference frequency and the deviation of the measured frequency from the reference frequency as a % error. 
Programmable Compare (GO-NOGO): The LCD will display PASS if the input frequency is with in the HI/LO limits, LO if the frequency is lower than the LO limit and HI if the frequency is higher than the HI limit. 
Frequency range: CHC: 2.4GHz (CHA: 120MHz) 
Measurement: FRQ. A, FRQ. C, Time interval, Totalize, Duty cycle and RPM 
Resolution: 7 Digits 
Range: Full Auto Range 
Trend Plot: The REF is the centerline value on the trend graph, H/Div is the X axis (time) and V/DIV is the Y axis (amplitude). 
Setup: Setting and functions may be selected and stored in memory from the front panel. Eight setups may be stored in memory. 
Equipment: Displays information about your instrument including the Model number, serial number, Calibration date, GP-IB address and Firmware revision. 
Remote Control: Function and ranges may be controlled from a PC via the RS232 or the optional GP-IB interface. 
Display: 128 by 64 pixel Super Twisted LCD display 
Power Source: May be used with any line voltages from 85V to 270Vac (+-10%, 48 to 66Hz) without any internal changes. 

The C3120 is a high performance and low cost programmable multi-function counter. It is designed by a high-tech team. This instrument combines the bench-top and system features which provides a versatile solution for your testing requirements now and in the future. 

Specification 

CHANNEL A Frequency Range DC Coupled: 0 ~ 120MHz 
AC Coupled: 10Hz ~ 120MHz 
Sensitivity 25mVrms (Sine Wave) 
Coupling DC or AC 
Impedance 1Mohm less then 35pF 
Attenuator x1, x10 
Maximum Input voltage 250V (DC or AC Peak) 
Trigger slope Positive or negative 
Resolution 0.00001Hz (at Gate time=1Sec, Input Frq=200Hz) 
CHANNEL C 
Frequency Range 100MHz ~ 2.4GHz 
Sensitivity 25mVrms 
Coupling AC 
Maximum Input voltage 5V (DC or AC Peak) 
Channel CH A, CH C 
Measurement Function FRQ.A, FRQ.C, TOT.A (Totalize), DUTY. A and RPM A 
Gate Time 50mS, 100mS, 200mS, 300Ms, 400mS, 500mS, 600mS, 700mS, 800mS,900mS, 
1S, 2S, 3S, 4S, 5S, 6S, 7S, 8S, 9S, 10S