HP / Agilent 5334B 100 MHz Universal Counter

The HP/Agilent 5334B is a 100 MHz universal counter engineered for precision frequency, period, time interval, and ratio measurements across research, calibration, and automated test environments. It delivers 9-digit resolution per second of gate time for frequency measurements from 0.001 Hz to 100 MHz on both channels, with single-shot time interval resolution of 2 ns and averaged resolution down to 200 ps. The instrument measures rise time, fall time, pulse width, peak amplitude, and AC/DC voltage with selectable triggering, auto-attenuation, and configurable input impedance (1 MΩ or 50 Ω). A standard 10 MHz OCXO time base ensures stability; Option 010 provides enhanced long-term accuracy with a 5 × 10⁻¹⁰ per day aging rate.

Technical Specifications Frequency and Period Measurements

Range: 0.001 Hz to 100 MHz (Channels A and B)

Resolution: 9 digits per second of gate time

Time Base: 10 MHz OCXO (standard); Option 010 with 5 × 10⁻¹⁰ per day aging rate after 24-hour warm-up Time Interval Measurements

Single-shot resolution: 2 ns

Averaged resolution: 200 ps (100-gate averaging)

Selectable delay: 1 ms to 99.999 seconds Input Characteristics (Channels A and B)

Frequency range: DC to 100 MHz (DC-coupled); 30 Hz to 100 MHz (AC-coupled, 1 MΩ); 1 MHz to 100 MHz (AC-coupled, 50 Ω)

Sensitivity: 15 mV rms to 20 MHz; 35 mV rms to 100 MHz; 100 mV peak-to-peak minimum for 5 ns pulses

Dynamic range: 45 mV to 5 V peak-to-peak to 20 MHz; 100 mV to 2.5 V peak-to-peak to 100 MHz

Impedance: 1 MΩ or 50 Ω (switch-selectable)

Coupling: AC or DC (switch-selectable)

Attenuator: Manual (X1 or X10) and Auto modes

Low-pass filter: 100 kHz nominal (Channel A, switchable) Triggering

Trigger level: ±5.1 V adjustable range (X attn), displayed in 20 mV steps

Auto trigger: 100 Hz to 100 MHz (DC-coupled); 100 Hz to 100 MHz (AC-coupled, 1 MΩ); 1 MHz to 100 MHz (AC-coupled, 50 Ω)

Trigger slope: Independent ±slope selection for START and STOP

Sensitivity control: 15 mV rms to 150 mV rms variable range

Key Features

Independent trigger slope selection for START and STOP signals

Auto-triggering across DC and AC coupling modes

Switchable 100 kHz low-pass filter on Channel A

Manual and automatic attenuation modes for simplified operation

Typical Applications

Research and development signal characterization

Precision calibration laboratory measurements

Automated test equipment (ATE) integration

Time interval and pulse parameter analysis

Compatibility & Integration The 5334B accepts signals from both 1 MΩ and 50 Ω sources with AC or DC coupling, supporting integration into mixed-impedance test environments.