HP / Agilent 5335A Universal Counter, 200 MHz

The HP Agilent 5335A is a 200 MHz universal counter delivering precision frequency, time interval, ratio, and pulse measurements across research, development, and manufacturing environments. This instrument combines multi-channel capability with flexible triggering and integrated math/statistics functions to support demanding metrology workflows.

Technical Specifications Measurement Capabilities

Frequency: 200 MHz (Channel A), 100 MHz (Channel B), optional 1.3 GHz (Channel C)

Time Interval: 2 ns single-shot resolution, 100 ps average resolution

Ratio Measurements: Full function capability

Totalize: Up to 100 MHz

Rise/Fall Time: 20 ns to 10 ms range

Pulse Width: 5 ns to 10⁷ seconds

Duty Cycle: 10% to 89%

Slew Rate: 50 V/µs to 10⁸ V/µs

Phase: Automatic measurement supported

Math & Statistics: Scale, offset, normalize; averaging and standard deviation with N=100 or N=1000 selection Input Characteristics (Channels A & B)

Coupling: DC; AC via 1 MΩ or 50 Ω impedance

Frequency Range: DC-coupled 0–100 MHz; AC 1 MΩ 30 Hz–100 MHz; AC 50 Ω 200 kHz–100 MHz (Channel A extends to 200 MHz in Frequency A and Ratio modes)

Sensitivity (×1): 25 mV rms sine; 75 mV peak-to-peak pulse (5 ns minimum width)

Dynamic Range (×1): 75 mV–5 V to 100 MHz; 75 mV–2.5 V above 100 MHz

Signal Range (×1, DC): −5 V to +5 V

Input Impedance: 1 MΩ nominal (<35 pF shunt) or switchable 50 Ω

Attenuator: X1 or X10 switchable Triggering

Modes: Manual and Automatic

Manual: ±5 V dc range

Automatic: Selectable 10–90% rise/fall or 50% phase trigger; DC offset tracking

Trigger Level DVM: Built-in display for both channels

Trigger Level Range (×1): Auto OFF −5 V to +5 V (0 V nominal); Auto ON adjustable between signal peaks

Key Features

Dual-channel base configuration with optional third channel to 1.3 GHz

Switchable impedance and coupling for signal adaptation

Independent manual and automatic trigger control with peak tracking

Integrated trigger-level monitoring via dedicated DVM

Statistical analysis with selectable sample sizes

Typical Applications

Frequency and timing characterization in RF and digital circuits

Pulse parameter validation in semiconductor testing

Phase relationship measurement between signals

Time-interval analysis in timing systems and synchronization circuits

Compatibility & Integration HP-IB interface supported for automatic trigger control and remote operation.