Phase Comparator-Analyzer VCH-323

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Phase comparator-analyzer VCH-323 is intended for precise frequency instability and phase noise measurements (Allan deviation, L(f)).

Key applications:

– Metrological characteristics monitoring of the of precise signal sources, including crystal oscillators and quantum frequency standards;
– Scientific research measurements.

Specification

The comparator has two identical measuring channels (three inputs) and uses correlation processing providing extremely low measurement error and the frequency instability calculation of each input signals.
Input signals: sinusoidal in frequency range from 1 up to 100 MHz (different frequencies at all inputs are allowed), level (0.6−1.2) Vrms, 50 Ohm load.
Noise bandwidth: 0.5, 5, 50, 500 Hz.
Averaging time range: 0.001 s to 10 6 s.
Phase noise spectrum measurement range: 0.001 Hz to 100 kHz.
Allan deviation noise floor, not more:

Frequency offset Phase Noise L(f), dBc/Hz
“Three inputs” mode for the input signal pairs (YX, ZX)
Specification Typical
Frequency of input signals Frequency of input signals
5 MHz 10 MHz 100 MHz 5 MHz 10 MHz 100MHz
1 Hz −130 −127 −107 −141 −138 −119
10 Hz −143 −135 −115 −145 −146 −128
100 Hz −145 −143 −127 −147 −147 −133
1 kHz −146 −145 −133 −148 −148 −134
10 kHz −147 −145 −135 −148 −149 −138
100 kHz −148 −146 −140 −148 −150 −143
Frequency offset Phase Noise L(f), dBc/Hz
“Two inputs” mode the input signal pair YX.
“Three inputs” mode for the input signal (X)
Specification Typical
Frequency of input signals Frequency of input signals
5 MHz 10 MHz 100 MHz 5 MHz 10 MHz 100MHz
1 Hz −130 −127 −107 −135 −130 −110
10 Hz −143 −135 −115 −150 −145 −127
100 Hz −145 −143 −127 −155 −153 −140
1 kHz −146 −145 −133 −160 −158 −150
10 kHz −147 −145 −135 −163 −160 −150
100 kHz −148 −146 −140 −163 −160 −155

Interfaces: LAN.
Software: calculates relative frequency difference, Allan deviation, phase noise spectrum.
Temperature in use: +5°С to +40°С.
Power supply: AC(198÷242)V, DC(50÷60)V.
Power consumption: AC(198÷242)V.
Size (H×W×D): 184×449×339 mm.
Weight: not more 12 kg.