This VC2000 is an intelligent multi- function instrument which measuresFrequency
Pulse counting, Crystal. it has 4 step gate time, 5 range functionselect and 8digits
display. All function dependon single CPU, A crystal controlled temperaturecircuit
provides constant compensation for the temperature drifting
Technique specification
A. Measurement
.Input terminal - there are 3 input terminals on this instrument
CHA - High frequency 50MHz - 24000MHz.
CHB - Low frequency 10Hz - 50MHz.
Crystal Oscilloscope: for crystal measurement
|
Resolution
|
Frequency
|
Function
|
Step
|
|
10Sec
|
5.0Sec
|
1.0Sec
|
0.1Sec
|
|
|
|
|
100Hz
|
100Hz
|
100Hz
|
1KHz
|
2400MHz
1000MHZ
|
Frequency
Measurement
|
|
|
10Hz
|
10Hz
|
100Hz
|
1KHz
|
100MHz-990MHz
|
|
10Hz
|
10Hz
|
100Hz
|
1KHz
|
50MHz-99MHz
|
|
1.0Hz
|
1.0Hz
|
10Hz
|
100Hz
|
4MHz-50MHz
|
|
0.1Hz
|
0.1Hz
|
1Hz
|
10Hz
|
10Hz-4MHz
|
2
|
|
3
|
|
--------
|
--------
|
--------
|
--------
|
Max 99999999
|
Counting
|
4
|
|
1.0Hz
|
1.0Hz
|
10Hz
|
10Hz
|
3.5MHz-16MHz
|
Crystal Oscillator
Measurement
|
|
Gate Time: 0.1Sec - 1.0Sec - 5.0Sec - 10Sec.
Accuracy: Time base deviation X frequancy+ -1d.
progressive counting measurment.
4 steps CHB input terminal.
resolution: + -1d counting frequency: 10Hz - 4MHz.
Crystal measurment
Input Features:
Input sensitivity for CHA 25mVrms/200m Vrms.
Input impedance: approx. 50 Ohm
Max safety voltage: 3V
Input sensitivity for CHB: No 2 range 25m Vrms/80m Vrms
No 3 range 10mVrms/30m Vrms
Input impedance: approx. 1Mohm (less then 35pF).
Max input safety voltage:30V
Time base: Short term stability: ± 3x10-9/second
Long term stability:± 2x 10-5/Month
Temperature:±2x10-5/10°C -40°C
Power:110-220V
Size:270x215x100mm
Weight: approx. 1550gr
