The Wayne Kerr AMM20002Q is a portable automatic modulation meter for measuring AM, FM, and PM signals across 150 kHz to 2.4 GHz. Built-in digital self-calibration delivers better than 1% accuracy, while microprocessor control automatically locks onto the strongest carrier. Manual keyboard tuning and dual-mode frequency counter resolution (10 Hz RF, 0.1 Hz AF) enable precise signal analysis in development, production, and field environments.
Technical Specifications
• Frequency Range: 150 kHz to 2.4 GHz
• Modulation Measurement: AM (99%), FM (500 kHz peak deviation), PM (50 radians)
• Modulation Bandwidth: 10 Hz to 300 kHz
• Accuracy: Better than 1% with digital self-calibration
• Carrier Level Range: −6 dBm to +20 dBm (direct); up to +30 dBm with external 10 dB attenuator
• Maximum Sensitivity: −30 dBm for modulation and frequency measurement
• Excess Power Protection: Up to 25 W; 250 mW minimum at RF input
• Frequency Counter: 10 Hz resolution (RF range); 0.1 Hz resolution (AF range)
• Reference Oscillator: TCXO standard, ±1 × 10⁻⁶ per year aging rate
– Key Features
• Automatic carrier lock with manual keyboard override
• Digital self-calibration for AM, FM, and PM
• Signal conditioning: three high-pass and four low-pass filters
• FM de-emphasis mode for broadcast signal analysis
• Peak or True RMS level modes with absolute/relative and linear/dB display options
• Peak hold capture and selectable digital averaging for noise rejection
• AF input jack for baseband signal analysis
• 32-character alphanumeric LED display with 20-segment analog bar graph
• 99 user-defined setup memory for rapid test reconfiguration
• Sealed tactile membrane keyboard with RFI shielding
– Typical Applications
Research and development of modulated RF signals, production quality control, transmitter performance verification, and field troubleshooting of AM/FM/PM systems.
– Compatibility & Integration
GPIB interface enables remote operation and integration into automated test systems. External 10 dB attenuator pad supported for extended carrier level measurement to +30 dBm continuous (1 W maximum power).
