RUBIDIUM REFERENCE OSCILLATORS AND RUBIDIUM FREQUENCY STANDARDS,
MEASURING EQUIPMENT, DEVELOPMENT AND PRODUCTION
Rubidium Time & Frequency Standards with measuring functions and Frequency Comparators

Frequency Comparator CHK7-1012

The CHK7-1012 is intended for relative frequency measurements of high-stable signals by comparison them with a external reference signal. All results of measurement are sent to an external PC that makes calculations automatically. All needful software is supplied.
The CHK7-1012 can test frequency stability frequency offset of Rubidium and Crystal Oscillators with 1; 5; 10; 2.048; 10.24 MHz outputs. The measurement error is less than 2.10-12 at 1 s and 5.10-14 at 100 s averaging time.

There is USB-2.0 port for connection with external PC. The serial RS- 232 is available also.
All measurements can be made in mobile conditions as DC Power Supply (+27 ± 3V) can be used.

As a result of technical reconstruction made in February of 2007 new operating mode appeared in the CHK7-1012 Ц Уthe long-term summary modeФ. The new mode makes possible to operate for some days (to make continuous measurements) without connection to an external PC. All the measured results are kept in the internal memory of CHK7-1012 and can be loaded into PC by requirement.

CHK7-1012 can recognize the reference frequency automatically.
It can operate with AC 220 V and DC +27 ± 3V Power Supply.

 

Technical Data:

1. Input Reference frequency, MHz
1, 5, 10
2. Input Measuring frequency, MHz
1; 2,048; 5,0; 10,0; 10.24

3. Max Frequency difference

± 1 Hz

4. Measurement Error (Allan Variance)

< 1.10-12 /1 s
< 5.10-13 /10 s
< 5.10-14/100 s

5. Input levels
( 1.0 ± 0.2 ) Vrms @ 50 Ohms
6. Warm-up-time
5 minutes
7. Power Supply
20 W
8. Connection to external PC

USB 2.0

9. Size, mm
215 х 130 х 45
10. Voltage Supply

+ ( 22 30 )V DC / 220 V AC, 50 Hz

System requirements : IBM PC Pentium 3 600 MHz, RAM 128 Mb, CD - ROM, USB or RS-232 port , free 5 Mb on the hard disc, Microsoft Windows 2000/ XP.