Image 1, SRS SR625 Frequency Counter - Instrumentcenter

Image 2, SRS SR625 Frequency Counter - Instrumentcenter

Image 3, SRS SR625 Frequency Counter - Instrumentcenter

SRS SR625 Frequency Counter

Rubidium time base with 11-digit resolution, 2 GHz prescaler, 10 MHz reference output, statistical functions, Allan variance and GPIB/RS-232 interface.

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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

The SR625 Frequency Counter is a NIST traceable frequency counting standard for calibrating base stations, transmitters and many other types of communication systems.

It combines the high resolution and wide variety of features found in the SR620 counter with the atomic accuracy of a rubidium timebase.