Frequency 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 etalone 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:?±5.0x10–9.
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 | ≤1.5x10–13 |
10 s | ≤2.0x10–14 |
100 s | ≤3.0x10–15 |
1000 s | ≤5.0x10–16 |
3600 s | ≤5.0x10–16 |
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 °С to +40 °С.
Interface:?RS-232; USB.
Power:?220 V, 50 Hz.
Power consumption:?≤60 V?A.
Dimensions (WxHxD):483x133x312 mm.
Weight:?8 kg.
Warranty:?3 years.
Live time:15 years.