CHK7-1011 is intended for use as a highly stable source of signals with frequencies of 1, 5 and 10 MHz in various frequency & time measuring systems and at the same time as a precise instrument for measurements of the relative frequency difference of precision crystal oscillators and rubidium frequency standards. It features high frequency stability and spectral purity of the output signal. GPS/GLONASS disciplined rubidium standard. Syncronized by GPS/GLONASS or external time scale 1pps output with a time interval measuring function. All-digital frequency control and parameters monitoring. The measurement results and the status of the device parameters are displayed on the built-in TFT display.
| 1. The nominal value of the reference signal frequency, MHz | 5, 10 |
| 2. The nominal value of the test signal frequency, MHz | 1; 2,048; 5; 10; 10,24 |
| 3. The maximum deviation of the frequency of the input signals from the nominal value, Hz, at range | ± 1 |
| 4. Input signals amplitude @ 50 Ω, Vrms, at range | от 0,4 до 1,2 |
| 5. RMS error in determining the relative frequency deviation for the averaging time 1 s | < 2·10-12 |
| 10 s | < 5·10-13 |
| 6. Output frequency, MHz | 1, 5, 10 |
| 7. Output signals amplitude at a load of 50 Ω, Vrms, at range | 1,0 ± 0,2 |
| 8. Accuracy at shipment, at range | ± 2·10-11 |
| 9. Aging (after 72 hrs), at range | ± 2·10-11/month |
| at range | ± 2,4·10-10/year |
| 10. Relative error of frequency for 1 day when operating in the automatic frequency adjustment, at range | ± 5·10-12 |
| 11. Frequency retrace (after 24 hrs on) | < 2·10-11 |
| 12. Short-term stability (Allan variance) 1 s | < 1,4·10-11 |
| 10 s | < 5·10-12 |
| 100 s | < 2·10-12 |
| 1 day | < 5·10-12 |
| 13. The tuning range of the output frequency (digital with step 1·10-12) | ±1·10-9 |
| 14. Synchronization accuracy by external 1 pps signal, µs, at range | ± 0,1 |
| 15. AC / DC power supply voltage, V | 198 to 242 / 22 to 30 |
| 16. Input power, W | < 60 |
| 17. Dimensions (depth×width×height), mm | 310x255x170 |
