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SR620  Universal time interval and frequency counter
Unlike conventional counters that only have numeric displays,the SR620 provides live, graphical displays of measurement
results. Graphical data is available in three formats: a histogram
showing the distribution of values within a set of
measurements, a strip chart of mean values from successivemeasurements, or a strip chart of jitter (standard deviation orAllan variance) values from successive measurements. Up to
250 strip-chart points or histogram bins can be displayed.
SR620 Time Interval & Frequency Counter · 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 X-Y scopes · Hardcopy to industrial printers and plotters · GPIB and RS-232 interfaces · Optional ovenized timebase · SR620 ... $4950
The SR620
Time interval counter performs virtually all of thetime and frequency measurements required in a laboratory or
ATE environment. The instrument's single-shot timing
resolution and low jitter make it the counter of choice for
almost any application. SR620 Measurements Histograms and Strip Charts The SR620 measures time interval, frequency, pulse-width,rise and fall time, period, phase and events. Time intervals are
measured with 25 ps rms resolution, making the SR620 one of
the highest resolution counters available. Frequency is
measured from 0.001 Hz to 1.3 GHz, and a choice of gates
ranging from 1 period to 500 seconds is provided. The SR620
delivers up to 11 digits of frequency resolution in one second,
making it suitable for measurement applications ranging from
short-term phase locked loop jitter, to the long-term drift ofatomic
professional clocks. All measurement modes are supported by awide variety of flexible arming and triggering options.
(U.S. list) Stanford Research Systemsphone: (408)744-9040 www .thinkSRS.com