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 etalon systems;
– computed control measustem;
– scientific research measurements.
Manual for VCH-315
– Hardware Operational Manual (Software Operation Manual)
download
– User Guide
download
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 10
6
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 | |
| 1 day | ≤1.0·10 -16 | |
| * Specified under condition: ambient temperature changing rate <1°С/hour. | ||
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 supply:
AC(198÷242)V, (50÷60)Hz.
Power consumption:
≤40 V⋅A.
Dimensions (W×H×D):
483×133×370 mm.
Weight:
8 kg.
Warranty:
3 years.
Live time:
15 years.
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