SR625 - Frequency Counter
Stanford Research Systems - SRS
Frequency Counter with Rb Timebase: The SR625 Frequency Counter is a NIST traceable frequency counting standard for calibarating base stations, transmitters and many other types of communication systems.
- Rubidium atomic timebase
- 2 GHz prescaler input
- 11-digit frequency resolution (1 s)
- 10 minute warm-up period
- Portable operation
- 10 MHz Rb timebase output
- Statistical analysis & Allan variance
- Hardcopy to printers and plotters
- GPIB and RS-232 interfaces
SR620 - Frequency Counter
Stanford Research Systems - SRS
Time Interval and Frequency Counter: The SR620 Time Interval Counter performs virtually all of the time and frequency measurements required in a laboratory or ATE environment.
- 25 ps single-shot time resolution
- 1.3 GHz frequency range
- 11-digit frequency resolution (1 s)
- 0.001° phase resolution
- Statistical analysis & Allan variance
- Graphical output to XY scopes
- Hardcopy to printers and plotters
- GPIB and RS-232 interfaces
- Optional ovenized timebase
Electronic Test & Measurement 
