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Multichannel Frequency Comparator

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The frequency comparator VCH-315 is a multichannel system for precise signals instability measuring.
The device is controlled by PC through RS-232C or LAN interface.
Input signals: sinusoidal 5 MHz, 10 MHz, 100 MHz; 0,8 – 1,2 V rms; pulse 1 Hz (as option).
Number of channels: 8.
Input impedance: 50 Ohm.
Maximal input relative frequency difference: df/f = ±0,5x10-9.
Passband: (10 ± 3) Hz.
Measuring time: t = 1 - 106 s.
Frequency difference measurement resolution: 10–14/t.
Measurement error (frequency instability introduced by the device):
Measuring time t

Main error
(RMS @ df/f=0)
not more
1 s

10 s

100 s

>1000 s

Additional error at df/f: <0.002df/f.
Application software:
- runs under Microsoft Windows 9x,2000,XP;
- calculates phase and frequency differences, Allan variance, frequency fluctuations spectra for each channel.
- represents results as tables and plots, stores information in files.
Power: 220 V, 50 - 60 Hz.
Power consumption: < 40 BA.
Dimensions: 145x450x315 mm.
Weight: 7 kg.


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