The Advantest R5372P is a dual-channel microwave frequency counter delivering precise measurements from 10 mHz to 18 GHz. Built on Advantest’s digital TRAHET system—combining transfer oscillator, heterodyne, and reciprocal counting techniques—it excels at characterizing continuous-wave signals, pulse-modulated waveforms, and complex radar emissions. The instrument resolves 1 Hz in 1 second across microwave bands and captures pulse width and repetition frequency with 10 ns resolution.
Technical Specifications
Frequency Coverage & Channels
• Overall range: 10 mHz to 18 GHz
• Channel 1: 10 Hz to 550 MHz; 25 mV sensitivity; 5 V maximum input; 50 Ω impedance; ×1/×20 attenuation; AC coupling
• Channel 2: 500 MHz to 18 GHz; 2.24 V sensitivity; 5 V maximum input; 50 Ω impedance; ×1/×20 attenuation; AC coupling
• Reciprocal counting (A input): 10 mHz to 10 MHz with 10 ns resolution
Timing & Stability
• Time base stability: 0.0000001 /yr
• Measurement throughput: 0.05 s
• External time base reference: 10 MHz
Computation & Analysis
• Frequency offset display, difference count, frequency deviation (Δf), parts per million (ppm), and standard deviation
• Maximum and minimum value holding
• Arithmetic functions: addition, subtraction, multiplication, division
• Digital comparator function
• PCM error bit totalizing
– Key Features
• Simultaneous two-channel input for comparative measurements
• Burst wave measurement capability
• Radar-specific metrics for aircraft, harbor, river, and fire prevention applications
• Totalizing functions for repetitive phenomena
• AC-coupled inputs protect against DC offset drift
– Typical Applications
• Microwave and RF component characterization
• Pulsed radar signal analysis and verification
• Pulse width and duty cycle measurement
• Carrier frequency tracking in modulated systems
• Frequency deviation monitoring and trending
– Compatibility & Integration
External 10 MHz time base reference input accommodates synchronization to primary frequency standards. Operates in horizontal position with forced-air cooling; maintain 10 cm minimum clearance around ventilation vents.
