The Agilent/Keysight E1333A is a VXI-based 3-channel universal counter module for frequency, time interval, and event counting within automated test systems. It delivers six core measurement functions—frequency, period average, pulse width, time interval, totalize, and ratio—with three input channels supporting multiplexed operation. The module integrates directly into VXI systems for R&D, manufacturing, and service test environments.
Technical Specifications
Measurement Functions
• Frequency
• Period Average
• Pulse Width (with Average Mode)
• Time Interval (with Average Mode)
• Totalize
• Frequency Ratio
Frequency Measurement
• Maximum frequency: 1 GHz (prescaled by 64 on Channels 1 and 2)
• Range (Channels 1–3): 75 MHz to 1 GHz
• Input coupling: AC coupled
• Input impedance: 50 Ω
• Input range: ±5 Vp
• Sensitivity (75 MHz to 600 MHz): 10 mV
• Dynamic range (75 MHz to 600 MHz): 51 dB
Period Average Measurement
• Averages 2^N periods; N range: 1 to 16
• Minimum pulse width: 60 ns
• Resolution: 1 / (10 × 10^6 × 2^N) s
Pulse Width Measurement
• Minimum pulse width: 5 ns
• Resolution: (100/2^N) ns; N range: 0 to 7
Time Interval Measurement
• Minimum interval: 200 ns
• Maximum interval: (6871/2^N) s; N range: 0 to 7
• Resolution: (100/2^N) ns
Totalizing
• Count range: 1 to (2^36 − 1)
• Minimum pulse width: 5 ns
Frequency Ratio Measurement
• Measures ratio between Channels 1 and 2 or Channels 2 and 1
• Resolution: 1/2^N; N range: 6 to 36
• Minimum pulse width: 5 ns
Time Base
• Frequency: 10 MHz
• Initial accuracy: 2 ppm
• Aging rate: 2 ppm/year
• Temperature drift: 5 ppm (0 to 50 °C)
– Key Features
• Three independent input channels with simultaneous signal conditioning
• Per-channel trigger level and sensitivity controls
• AC-coupled 50 Ω inputs rated ±5 Vp
• Prescaled operation to 1 GHz on all channels
• 10 MHz time base with ±2 ppm initial accuracy
– Typical Applications
• Automated frequency and timing measurements in production test
• Multi-channel event counting and pulse characterization
• Ratio and time-interval analysis in systems verification
• Research and service instrumentation requiring VXI integration
– Compatibility & Integration
• B-size, 1-slot register-based VXI module
• Compatible with Agilent/Keysight Foundations
• VXI bus interface
