Advantest R5373P Microwave frequency counter

The Advantest R5373P is a microwave frequency counter designed for precision measurement across 10 mHz to 27 GHz. It employs digital TRAHET technology—combining transfer and heterodyne techniques—to deliver high sensitivity and exceptional resolution. The instrument measures frequency, period, time interval, pulse width (minimum 0.5 µs), pulse repetition frequency (10 Hz to 5 MHz), carrier frequency of pulse-modulated signals, and FM deviation. Resolution reaches 1 Hz in 1 second for microwave frequencies, with decade-selectable settings from 0.1 Hz to 10 MHz and maximum resolution to 0.1 mHz in specific modes. Timebase stability is 1.5 ppm, with accuracy of ±1 count plus time base accuracy. Measurement speed reaches 1000 measurements per second.

– Technical Specifications

• Frequency Range: 10 mHz to 27 GHz
• Measurement Modes: Frequency, period, time interval, pulse width, pulse repetition frequency, carrier frequency of modulated signals, FM deviation
• Resolution: 1 Hz (1 second gate, microwave), decade-selectable 0.1 Hz to 10 MHz, maximum 0.1 mHz
• Accuracy: ±1 count ± time base accuracy ± residual stability (1/10 × measurement frequency in GHz, rms)
• Timebase Stability: 1.5 ppm
• Sensitivity: –35 dBm to +20 dBm
• Measurement Speed: Up to 1000 measurements/second
• FM Range: ±125 MHz (signals ≥1.4 GHz manual); ±25 MHz (500 MHz–1.4 GHz manual); 10 MHz p-p (automatic, worst case)
• Power Supply: 100–240 V AC, 50/60 Hz

– Key Features

• Pulse width capability: minimum 0.5 µs
• D-A analog output (–4.995 V to +4.995 V ±20 mV, 100 Ω max impedance)
• 10 MHz timebase output (1 Vp-p min, ~50 Ω)
• External frequency standard inputs: 1, 2, 2.5, 5, 10 MHz (1–10 Vp-p, ~500 Ω)
• Compact form factor: 213 mm (W) × 88 mm (H) × 355 mm (D), 2.8 kg

– Typical Applications

Microwave communication systems, broadcast equipment, satellite communications, microwave and millimeter-wave circuit testing and calibration.

– Compatibility & Integration

• Interfaces: GPIB, RS-232C
• Connectors: 14-pin TTL output (Amphenol 57-40140 equivalent), AUX input/output, BNC (timebase and external standard), SMA or N-type main input