HP / Agilent 5262A TIME INTERVAL UNIT

The HP/Agilent 5262A Time Interval Unit is a precision instrument for measuring time intervals with high resolution and low-noise performance across radar, signal processing, and electronic testing applications. The unit spans measurement ranges from 1 microsecond to 10⁸ seconds with 0.1 microsecond resolution, delivering accuracy of ±1 period of standard frequency counted plus time base accuracy. Two independent channels support flexible triggering on positive or negative polarity, positive or negative slope, and user-defined voltage thresholds.

Input signals require minimum 0.3 V peak-to-peak, direct coupled. Input impedance varies by multiplier position: 10 kΩ with <80 pF on x0.1 and x0.2 settings; 100 kΩ with <40 pF on x0.3 to x100 settings. Overload tolerance ranges from 50 Vrms / 150 V peak on lower multiplier positions to 250 Vrms on higher positions.

Each channel features independent TRIGGER SLOPE, TRIGGER LEVEL, and MULTIPLIER controls. The unit integrates with HP/Agilent electronic counters including the 5243L and 5245L mainframes, enabling flexible system architectures. Time base accuracy is retained when counting signals derived from its crystal oscillator reference.

Technical Specifications

• Measurement range: 1 microsecond to 10⁸ seconds


• Resolution: 0.1 microsecond


• Accuracy: ±1 period of standard frequency counted ± time base accuracy


• Input impedance: 10 kΩ (<80 pF) on x0.1, x0.2; 100 kΩ (<40 pF) on x0.3 to x100


• Minimum input signal: 0.3 V peak-to-peak, direct coupled


• Overload tolerance: 50–250 Vrms depending on multiplier position; up to 250 V peak

Key Features

• Two independent measurement channels


• Configurable trigger slope (positive/negative) and polarity


• Adjustable trigger level voltage threshold


• Three selectable operation modes via function switch


• Direct coupled inputs


• Crystal oscillator time base with retained accuracy

Typical Applications

• Radar system timing measurements


• Signal processing interval analysis


• Electronic testing and calibration


• Pulse-to-pulse interval measurement on isolated cables


• Leading/trailing edge pulse width determination


• Phase measurement via time interval between corresponding waveform points


• Manufacturing timing and synchronization


• Research and development timing applications

Compatibility & Integration Designed for integration with HP/Agilent electronic counter mainframes including Models 5243L and 5245L. Approximately 22 lbs shipping weight.