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
Step
|
Function
|
Frequency
|
Resolution
|
|
|
|
0.1 S
|
1.0 S
|
5.0 S
|
10 S
|
|
Frequency Measurement
|
2400MHz - 1000MHz
|
1 KHz
|
100Hz
|
100Hz
|
100Hz
|
990MHz - 100MHz
|
1 KHz
|
100Hz
|
10 Hz
|
10Hz
|
99 MHz - 50 MHz
|
1 KHz
|
100Hz
|
10Hz
|
10Hz
|
50 Mhz-4 Mhz
|
100Hz
|
10 Hz
|
1Hz
|
1 Hz
|
2
|
4 Mhz - 10 Hz
|
10 Hz
|
1 Hz
|
0.1 Hz
|
0.1Hz
|
3
|
4
|
Counting
|
Max 99999999
|
-
|
-
|
|
Crystal Oscillator Measurement
|
16M Hz -3.5 M Hz
|
10 Hz
|
1 Hz
|
1 Hz
|
1 Hz
|
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 10-5/10oC - 40o C
Power: 110 - 220V
Size: 270 X 215 X100 mm
Weight: Approx. 1550 g.