HC-F2700L Frequency Counter 2.7G Frequency Crystal Signal
Counter Testing
Technical conditions
Input Characteristics
Channel A
Input Sensitivity: 10MHz Range: 10Hz ~ 8MHz 20mVrms
8MHz ~ 10MHz 30mVrms
100MHz range:10Hz~8MHz20mVrms
80MHz ~ 100MHz 30mVrms
Attenuation: x1, X20 Fixed
Filter: Low Pass, 100KHz, -3dB Impedance: Approx. 1MΩ (less than 35PF)
Maximum Safe Voltage:250V(DC+ACrms)(ATT set X20) Channel B
Input sensitivity:20mVrms Impedance:≈50Ω Maximum safe voltage:3V Time base.
Time base frequency:10MHz
Short-term stability:±3X10/sec Long-term stability:±2X10/month
Temperature coefficient: ±1X10,0℃~40℃
Voltage line: ±10% per change, time base frequency change ±1X107 working principle
This instrument for frequency, period measurement are used in equal precision measurement principle, that is, in the predetermined measurement time TX
The number of No, and then by the microprocessor for data calculation and processing. (gate time) by the counter 1 on the measured signal integer pulse counting Nx, counter 2 on the standard clock does not count the number of cycles.
Calculation formula: Frequency Fx=Nx/Tx Period Px=Tx/Nx