HP / Agilent 5334A 100 MHz Universal Counter

The HP/Agilent 5334A is a dual-channel 100 MHz universal counter engineered for precision frequency, period, and time interval measurements across electronics development, quality assurance, and scientific research. Two matched input channels deliver 9-digit resolution on frequency and period, with time interval resolution down to 2 ns single-shot or 200 ps averaged. An optional C-channel extends range to 1.3 GHz. The instrument supports 12 measurement functions including frequency, period, rise/fall time, pulse width, peak amplitude, AC/DC voltage, time interval delay, ratio, and totalize.

## Technical Specifications

**Measurement Channels & Resolution**
• Two matched 100 MHz input channels (A and B); optional C-channel to 1.3 GHz
• Frequency and period: 9 digits per second
• Time interval: 2 ns single-shot; 200 ps with 100 Gate Averaging
• Frequency range (DC coupled): 0 to 100 MHz
• Frequency range (AC coupled, 1 MΩ): 30 Hz to 100 MHz
• Frequency range (AC coupled, 50 Ω): 1 MHz to 100 MHz

**Input Sensitivity & Dynamic Range**
• Sensitivity: 15 mV rms sine (to 20 MHz); 35 mV rms sine (to 100 MHz); 100 mV peak-to-peak pulse (5 ns minimum width)
• Adjustable to 150 mV rms via front panel control
• Dynamic range: 45 mV to 5 V peak-to-peak (DC to 20 MHz); 100 mV to 2.5 V peak-to-peak (to 100 MHz)
• Trigger level: ±5.1 V (X1 attenuation); ±51 V (X10 attenuation)
• Input impedance: 1 MΩ || <60 pF (AC or DC coupled); 500 Ω switchable
• Damage rating: 500 Ω input to 5 V rms; 1 MΩ (X1) to 200 V DC + peak AC (≤3.5 kHz); ±15 Vdc + peak ac

**Operating Features**
• AC or DC coupling with independent trigger slope selection (+ or −)
• 100 kHz low-pass filter (Channel A, switchable)
• Manual (X1/X10) or auto attenuator
• Arming input for measurement start/stop control
• Non-volatile memory: nine front panel setups
• HP-IB programmability standard for test system integration
• User-defined math functions with custom unit normalization and offset

## Key Features

• Dual 100 MHz channels with optional 1.3 GHz extension
• Nanosecond-class time interval resolution
• 12 measurement functions in one instrument
• Full HP-IB control for automated systems
• Field-selectable input impedance and coupling

## Typical Applications

Frequency verification and calibration; pulse timing analysis; rise/fall time characterization; device parameter measurement via ratio and totalize functions; system integration via HP-IB control.

## Compatibility & Integration

HP-IB (IEEE 488) programmability enables integration into automated test environments. Front panel setup storage supports repetitive measurement sequences without reconfiguration.