Time/Frequency Counter Model T3200U

Small box with USB control and supply by notebook, netbook, or PC
Time interval measurement range: 0 – 4400 seconds
Precision (standard deviation) < 35 ps at time interval measured from 0 to 200 ms
Frequency range up to 3.5 GHz
Frequency sampling up to 2 MSa/s
Measurement of Allan Deviation (ADEV)
Measurement of Time Interval Error (TIE, MTIE), TDEV
Totalize mode
Built-in automatic calibrator


Time Interval (between two pulses at two inputs or pulses appearing consecutively at a single, common input), Period, Pulse Width, Frequency, Frequency Sampling, Allan Deviation, Time Interval Error (TIE), Maximum TIE (MTIE), Time Deviation (TDEV), Totalize


Mean, Min and Max Values, Standard Deviation


Tables and plots of statistical distributions, display of frequency sampling in time domain to show possible frequency variation (Sampling mode)

Time Interval


0 – 4400 seconds (Inputs A and B)

Resolution (LSB)

25 ps in single-shot measurements, may be reduced with averaging

Precision (Standard Deviation)

< 35 ps at time interval measured from 0 to 200 ms

< 35 ps at time interval measured from 0 to 1 second, when using an atomic clock as external reference clock

< 35/ Sample _ Size ps with averaging

Frequency & Period


Inputs A and B: 0.1 Hz to 200 MHz

Sensitivity < 75 mV RMS typ. (0.01 to 200 MHz)

Minimum slew rate: 10 V/μs

Input F: 100 MHz to 3.5 GHz

Sensitivity < -12 dBm (< 55 mV RMS) from 400 MHz to 3 GHz

Sensitivity < - 3 dBm (< 160 mV RMS) from 100 MHz to 3.5 GHz

Gate Time

selected from 1 μs to 10 s (reciprocal method)

Measurement Rate

up to 8·105 measurements/ sec (when measuring frequency in 1 μs gate and storing data in internal FIFO memory),

up to 3.3·104 measurements/ sec stored to memory in PC

Frequency Sampling


Inputs A and B: 1 to 200 MHz

Input F: 100 MHz to 3.5 GHz

Sampling Rate

0.1, 0.2, 0.5, 1.0, 2.0 MSa/s



0 to 1012 counts

Input frequency

max. 200 MHz

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