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Phase Comparator-Analyzer VCH-323new

Phase comparator-analyzer VCH-323 is intended for precise phase and frequency instability measurements.

Key applications:
- Monitoring of the metrological characteristics in the production of precision signal sources, including crystal oscillators and quantum frequency standards
- Time and frequency references
- Scientific research measurements

Specification:
The comparator has two identical measuring channels and through the use of correlation processing provides extremely low error of measurement and the calculation of the frequency instability of each of the three input signals separately.

Input signals: sinusoidal in frequency range from 1 up to 100 MHz (different frequencies in all three channels are allowed) with level (0.4−1.2) Vrms.
Input impedance: 50 Ω.
Noise passband: 1, 10, 100, 1000 Hz.
Measurement time range: 0.001s to 106s.
Phase noise spectrum measurement range: 0.001 Hz to 100 kHz.
Allan variance noise floor at 5 MHz, not more:

Allan deviation
Averaging time Passband 3 Input Mode
(standard mode)
2 Input Mode
(cross-correlation mode)
0.01 s 100 Hz 3.0×10−12 3.0×10−13
0.1 s 10 Hz 3.0×10−13 7.0×10−14
1 s 1 Hz 2.0×10−14 7.0×10−15
10 s 1 Hz 2.0×10−15 1.0×10−15
100 s 1 Hz 7.0×10−16 2.0×10−16
1 hour 1 Hz 1.5×10−16 1.0×10−16
1 day 1 Hz 1.0×10−16 1.0×10−16

Λ(ƒ) noise floor at 5 MHz, not more:

Frequency offset Noise floor
1 Hz −140 dBc/Hz
10 Hz −145 dBc/Hz
100 Hz −150 dBc/Hz
10 kHz −165 dBc/Hz
100 kHz −165 dBc/Hz

Interfaces: LAN, USB.
Software: calculates relative frequency difference, Allan variance, phase noise spectrum.
Temperature in use: +5 to +40
Power: 100240 V AC, 5060 Hz.
Power consumption: ≤100 .
Size (W×H×D): 483mm×184 mm×312mm.
Weight: 10 kg.
Warranty: 3 years.

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"VREMYA-CH" JSC, Russia
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