The main application is a high precision time scale and frequency comparison/calibration of distant time keeping laboratories.
Key Applications
– National Time Keeping Service;
– Scientific institutes and universities;
– Radio Astronomy (VLBI);
– Ground support systems for GNSS.
Output signals:
one output: 5 MHz (sine), 1±0.2 V RMS into 50 Ohms,
one output: 10 MHz (sine), 1±0.2 V RMS into 50 Ohms,
one output: 100 MHz (sine), 1±0.2 V RMS into 50 Ohms,
one output: 1 Hz (pulse): Amplitude: >2.5 V into 50 Ohms; width: (15±5) µs.
Rise time: <3ns.
Sync. input to output <25ns.
The time keeping accuracy during the 12-hour transportation (without relativistic effects): ≤1.0 ns.
Frequency stability σy (3, τ) :
| Cavity tuning system time constant | |||
|---|---|---|---|
| τ~50 s | τ~2000 s | ||
| Time domain |
for use during 12-hour
transportation |
for use in lab | for use in lab |
| 1 s | ≤3.0·10 -13 | ≤1.5·10 -13 | ≤1.5·10 -13 |
| 10 s | ≤3.0·10 -14 | ≤3.0·10 -14 | ≤3.0·10 -14 |
| 100 s | ≤1.2·10 -14 | ≤1.2·10 -14 | ≤6.0·10 -15 |
| 1000 s | ≤4.0·10 -15 | ≤3.5·10 -15 | ≤2.0·10 -15 |
| 3600 s | ≤3.0·10 -15 | ≤2.0·10 -15 | ≤1.5·10 -15 |
| 10 000 s | — | ≤1.5·10 -15 | ≤1.0·10 -15 |
| 1 day | — | ≤5.0·10 -16 | ≤5.0·10 -16 |
When transporting the THC in working order, the following conditions must be met:
– ambient temperature from plus 20 to plus 25 °С;
– relative humidity up to 90% at a temperature of plus 25 °С;
Phase noise at 5 MHz output
| 1 Hz | ≤−118 dBc/Hz |
| 10 Hz | ≤−130 dBc/Hz |
| 100 Hz | ≤−150 dBc/Hz |
| 1 kHz | ≤−155 dBc/Hz |
| 10 kHz | ≤−155 dBc/Hz |
| 100 kHz | ≤−155 dBc/Hz |
Temperature sensitivity is less than 1.5·10
-15
/°С.
Magnetic field sensitivity is less than 1.0·10
-14
/Gauss.
Dimensions are 520 mm wide by 554 mm deep by 965 mm high.
Weight is 70 kg.
Consumption ≤80 W during transportation.
The device can operate both from 85-264 VAC and on an external DC source either from 12 to 15VDC or from 22 to 30 VDC.
The built-in battery provides 4 hours of autonomous operation.
