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Multichannel Frequency Comparator VCH-315Frequency comparator VCH-315 is intended for precise phase and frequency instability measurements. It contains eight identical measuring channels and performs high precision phase and frequency comparison.
Key applications
- verification of metrological parameters of precision frequency signals sources;
- time and frequency etalon systems;
- computed control measustem;
- scientific research measurements.
Specifications
Input signals: 5 or 10 or 100 MHz nominal frequency, (0.8÷1.2) V into 50 Ω load.
Input impedance: 50 Ω.
Noise passband: 10 Hz.
Maximal measured relative frequency difference: ±5.0×10–9.
Averaging time range: from 1 s up to 106 s.
Metrological characteristics are given in the table:
Main measurement error (Frequency
instability, inserted by noises of
measurement channels) |
Averaging time,
(τ) |
Allan deviation
noise floor |
| 1 s |
≤1.5×10–13 |
| 10 s |
≤2.0×10–14 |
| 100 s |
≤3.0×10–15 |
| 1000 s |
≤5.0×10–16 |
| 3600 s |
≤5.0×10–16 |
Interface: RS-232; USB.
Application software
- runs under Microsoft Windows 2000,XP, Vista, 7;
- calculates phase changing and frequency difference for each signals pair, two-samples Allan deviation, N-samples Allan deviation;
- represents measurement results as tables and plots, stores information in files.
Operating temperature range: +5 °Ñ to +40 °Ñ.
Interface: RS-232; USB.
Power: 220 V, 50 Hz.
Power consumption: ≤40 V⋅A.
Dimensions (W×H×D): 483×133×312 mm.
Weight: 8 kg.
Warranty: 3 years.
Live time: 15 years.
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