The HP/Agilent 5307A is a high-resolution counter module designed for integration into the HP 5300 Measuring System mainframe. It delivers precise frequency, time interval, and ratio measurements with six-digit resolution across multiple operational modes. The instrument combines selectable triggering, adjustable sensitivity control, and low-pass filtering to address demanding electronics testing, calibration, and research applications requiring detailed measurement fidelity.
## Technical Specifications
**Frequency Measurement**
• Range: 5 Hz to 2 MHz (Hz mode); 50 to 10,000,000 CPM / 0.833 Hz to 166 kHz (CPM mode)
• Resolution: Six digits
• Sensitivity: 100 mV peak minimum for 100 nsec pulses; continuously adjustable to 2.5 Vrms
**Time Interval Measurement**
• Hold-off: 0.35 µsec to 3.5 seconds and 1 msec to 10 msec
• Periods Averaged: Two periods at signals up to 100 Hz; increases by factor of 10 per decade, up to 200,000 periods above 1 MHz
• Accuracy: ±3 × 10⁻⁷ ± 1 count + trigger error ± time base error
**Internal Reference**
• 1.00000 MHz (Hz mode); 100,000 M (CPM mode)
## Key Features
• Selectable positive or negative triggering
• Input attenuation: X1 (non-attenuated) and X10 settings
• Low-pass filters with 100 Hz and 10 kHz cutoff frequencies
• Six-digit LED display
• Continuous sensitivity adjustment via front-panel control
• Mode selection between Hz and CPM display via pushbutton
## Typical Applications
Electronics testing, calibration work, and precision research requiring high-resolution frequency and time interval characterization.
## Compatibility & Integration
Designed as a plug-in module for the HP 5300 Measuring System mainframe, which provides power and system integration.
