DESCRIPTION
Designed for comparison of time and frequency standards output signals.
Main applications: standard time and frequency complexes, automatic measurement systems.
PRINCIPLE OF OPERATION
The Instrument principle of operation is based on conversion of 5 MHz or 100 MHz compared frequency signals into 1 Hz pulse signals with relative frequency instability increase by 104 times. An external Time Interval Meter can measure frequency instability.
The Phase Comparator Unit has three options: 5 MHz, 100 MHz, 5 and 100 MHz input frequencies (4 channels).
SPECIFICATIONS
Compared frequencies nominal values: 5, 100 MHz
Deviation from nominal value: not more than 3.5.10–7
Number of independent comparison channels: 4
Relative frequency instability multiplication factor: 104
Input signal rms value: 1±0.2 V
Compared frequency relative difference: not more than 1.10–10 (At frequency instability measurement for 1 s is not more than 1.10–8)
Phase variation temperature coefficient in operating temperature range:
at 5 MHz not more than 20 ps/ °C
at 100 MHz not more than 10 ps/ °C
rms frequency comparison accuracy not more than:
Averaging time |
Frequency comparison accuracy |
|
5 MHz |
100 MHz |
|
I s |
2.10-13 |
2.10–13 |
1 h |
6.10–16 |
4.10–16 |
Measurement accuracy at 1 h measurement time is guaranteed for ambient temperature variation within ±1 °C
GENERAL
Operating temperature range: 5–50 °C
Relative humidity: up to 98 % at 25 °C
Power: 220±22 V, 50 Hz, 22–30 V dc
In case of a power line failure the Instrument switches automatically to 22–30 V external power supply without additional measurement error
Power consumption: 70 VA, 50 W
Dimensions: 480x 200x555 mm
Weight: 27 kg