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Multichannel Frequency Comparator VCH-315Mnew

Multichannel Frequency Comparator VCH-315M Multichannel frequency comparator VCH-315M is intended for precise phase and frequency instability measurements. It contains 8 identical measuring channels and performs synchronous high precision phase and frequency comparison of 5, 10 and 100 MHz signals, which allows using cross-correlation methods for instability estimation. Each channel includes two inputs for measured signals (fx and fy).
Key applications

- verification of metrological parameters of precision frequency signals sources;
- time and frequency etalon systems;
- computed control measurement systems;
- scientific research measurements;

Device control, collecting and display of measurement results are carried out by computer using RS-232, USB or LAN interfaces.

Specifications

Input signals: 5, 10 or 100 MHz nominal frequency, (0.8−1.2) V into (501) Ohm load.
Maximal measured relative frequency difference: 5.0×109
Noise passband: 3 Hz.

Frequency instability, introduced by multichannel frequency comparator VCH-315m (at zero frequency difference between input signals, and on condition of temperature changing not more than 1,0 per hour within the operating temperature range), is displayed in the table:

Averaging interval Frequency instability, noise floor by Multichannel frequency
comparator VCH-315m
1 channel mode (ADEV) 2 channel mode (cross-ADEV)
1 s ≤6.0×1014 ≤2.0×1014
10 s ≤2.0×1014 ≤3.0×1015
100 s ≤3.0×1015 ≤1.0×1015
1 h and more ≤3.0×1016 ≤2.0×1016

Power: AC (22022) V, (502) Hz, or DC (22−30) V.

Power consumption is not more than 40 VA (for AC) and not more than 35 W (for DC)
Weight is not more than 12 kg.
Dimensions (W×H×D): 133.0×483.0×325.0 mm.


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