The Marconi IFR Aeroflex 6846A is a triple-function RF and microwave analyzer combining a synthesized source, three-input scalar analyzer, and synthesized spectrum analyzer in a single instrument. It delivers scalar network measurements, spectrum analysis to 24 GHz, and flexible source generation for component and subsystem characterization across telecommunications, aerospace, and defense applications.
Technical Specifications
Scalar Analyzer
• Frequency range: 10 MHz to 8.4 GHz
• Dynamic range: High with tuned input capability exceeding 80 dB insertion loss measurement
• Measurement accuracy approaches power sensor performance via EEPROM-corrected, individually characterized detectors
• Simultaneous insertion and return loss measurement with high-directivity autotest support
Spectrum Analyzer
• Frequency range: Up to 24 GHz
• Resolution bandwidth: 3 MHz to 1 kHz filters
• Instantaneous dynamic range: >80 dB
• Spurious measurement capability: Better than -60 dBc on full span sweeps
• Tracking generator across full range; offset tracking generator available for frequency translation device measurements with scale or multiplication factor configuration
Synthesized Source
• Frequency range: 1 MHz to 3 GHz (integrated RF synthesizer); above 3 GHz via VCOs
• Frequency resolution: 1 Hz
• Phase noise: Low (specifications not detailed)
• Harmonic performance: <-55 dBc (70 MHz to 24 GHz)
• Operating modes: CW output, swept source for scalar measurements, tracking generator with spectrum analyzer, offset tracking source for network measurements
• Power sweep function for amplifier gain compression testing
• CW mode suitable for local oscillator substitution
• Optional increased output power 3 to 24 GHz; optional step attenuators available
– Key Features
• Three-input scalar analyzer architecture for multiport characterization
• Low-distortion front end enabling high-dynamic-range measurements
• Frequency modulation support (internal or external, optional)
• Individual detector characterization for linearity and frequency response accuracy
– Typical Applications
• Component and subsystem RF/microwave characterization
• Return loss and insertion loss measurements
• Spurious and harmonic analysis
• Amplifier compression testing
• Network measurements on frequency translation devices
– Compatibility & Integration
The instrument integrates source, scalar analyzer, and spectrum analyzer functions without requiring external modules for basic operation. Offset tracking and optional modulation expand measurement capability for specialized network and modulation applications.
