HP 5386A 3 GHz counter, option 004

The HP 5386A 3 GHz Frequency Counter with Option 004 delivers high-precision frequency and period measurements across a 10 Hz to 3 GHz range. Built on GaAs prescaler and hybrid substrate architecture with bipolar reciprocal counting and interpolation techniques, this counter combines measurement performance with cost-effective operation. Option 004 upgrades the timebase to a high-stability Oven Controlled Crystal Oscillator (OCXO), substantially improving accuracy over time and temperature variations compared to the standard TCXO reference.

The instrument features a 12-character alphanumeric LCD readable in direct sunlight and supports remote operation via HP-IB (IEEE-488) interface for automated test environments. Two input ports—Channel A (female BNC) and Channel B (female N-type)—minimize switching overhead during multi-signal measurements.

– Technical Specifications

• Frequency Range: 10 Hz to 3 GHz
• Sensitivity: -23.5 dBm
• Input Dynamic Range: 30.5 dB (45 mV to 4 V pk-pk × attenuator setting)
• Input Damage Level: +25 dBm
• Attenuator: X1 or X20 nominal; X20 increases to X40 below 50 Hz
• Channel A Trigger Level: Variable from -0.1 V to +0.1 V × attenuator setting (manual mode); automatic to average signal value (auto mode)
• Low Pass Filter: 100 kHz, switchable
• Input Coupling: AC
• Input Impedance: X1: 1 MΩ || <25 pF; X20: 500 kΩ || <25 pF
• Reference Oscillator: Internal 10 MHz output; accepts external 10 MHz input
• Option 004 Timebase: High-stability OCXO replacing standard TCXO

– Key Features

• 12-character LCD with direct sunlight readability
• Two input ports reduce channel switching requirements
• HP-IB interface for computer control and system integration
• Half-rack form factor for bench or rack mounting
• Portable design suitable for field service and calibration
• Detachable power cord (229 cm, Part Number 8120-1378)

– Typical Applications

• Frequency and period measurements in automated test systems
• RF and microwave signal characterization
• Oscillator stability evaluation
• Field calibration and verification

– Compatibility & Integration

HP-IB (IEEE-488) connectivity enables seamless integration into computer-controlled test systems and automated measurement networks.