The Anritsu ML428B is a precision interference and field strength meter engineered for EMI characterization and RF field measurements across the 9 kHz to 30 MHz band. Purpose-built for EMC testing environments, it delivers direct digital field strength readout and multi-standard compliance (CISPR, VDE, FCC) through selectable Average, Quasi-Peak, and Peak detectors with frequency-dependent time constants. The instrument combines a synthesized local oscillator with auto-ranging capability, eliminating manual attenuator adjustment and streamlining signal-level characterization across demanding test protocols.
Technical Specifications
• Frequency range: 9 kHz to 30 MHz
• Frequency setting increments: 1 kHz, 10 kHz, 100 kHz, 1 MHz
• Input impedance: 50 Ω nominal, N-type connector
• Detectors: Average, Quasi-Peak, Peak
• Peak hold time (PEAK mode): 0.05 s, 0.3 s, 3 s selectable
• Quasi-Peak time constants: 45 ms charge/500 ms discharge (9 kHz–149 kHz); 1 ms charge/160 ms discharge (150 kHz–30 MHz)
• Frequency memory: 100 programmable channels
• IF output: 455 kHz
• Power supply: 100–127 VAC or 200–250 VAC (transformer selectable); DC 11.5–24V @ ≤2 A
• Power consumption: ≤40 VA
• Dimensions: 145 mm H × 280 mm W × 350 mm D
– Key Features
• Auto-ranging eliminates attenuator manual control
• Direct digital electrical field strength display with no table lookup required
• One-keystroke level calibration
• Equalizer circuit ensures conformance to CISPR mechanical time constants when recording
• Signal monitoring: A3A, A2B, A3E modulation with internal speaker, earphone jack, and Beat Frequency Oscillator
• Frequency synthesizer provides stable local oscillator operation
– Antenna Configuration
Designed for use with loop or rod antennas for electrical field strength measurement.
– Integration & Control
• IEEE-488 (GP-IB) standard interface with full SH1, AH1, T7, TEO, L4, LEO, SR1, RL2, PPO, DC1, DTO, CO compliance
• Analog recorder connector for data logging
• Antenna control connector for automated probe positioning
