Specifications of  Frequency Counter VC2000

This VC2000 is an intelligent multi-function instrument which measures Frequency, Pulse counting, Crystal. It has 4 step gate time, 5 range function select and 8 digits display.

All functions depend on single CPU, A crystal controlled temperature circuit provides constant compensation for the temperature drifting.

Technique specifications:

A. Measurement

1. Input terminal

There are 3 input terminals on this instrument:

CHA. High frequency 50 MHz - 2,4000 MHz

CHB. Low frequency  10Hz - 50 M Hz

Crystal Oscilloscope: for crystal measurement

Gate Time: 0.1S,1.0S,5.0S, 10S

Accuracy: Time base deviation X frequency +- 1 d

Progressive Counting measurement

4 steps CHB input terminal

resolution: +- 1d, counting frequency: 10Hz - 4Mhz

Crystal measurement:

Input Features:

Input sensitivity for CHA  25mVrms/200m Vrms

Input impedance: approx. 50 Ohm

Max safety voltage 3 V

Input sensitivity for CHB: No.2 range 25m Vrms/80 m Vrms

                            No.3 range 10mVrms/30m Vrms

Input impedance: approx. 1 M ohm ( less than 35 pF)

Max Input safety voltage: 30V

Time base:

Short term stability: +- 3 X 10^-9/second

Long term stability: +- 2 X 10^-5/Month

Temperature: +- 2 X 10^-5/10^oC - 40^o C

Power: 110 - 220V

Size: 270 X 215 X100 mm

Weight: Approx. 1550 g.

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