The Marconi IFR Aeroflex 6843 is a dual-function RF and microwave analyzer combining a synthesized source, three-input scalar analyzer, and spectrum analyzer in a single instrument. It delivers precision scalar network measurements and real-time spectrum analysis across 10 MHz to 20 GHz, with scalar analysis capability to 8.4 GHz and spectrum extension to 110 GHz via external waveguide mixers (Option 020). The integrated synthesized source operates as CW output, swept source, tracking generator (to 46 GHz), and offset tracking source, with 1 Hz frequency resolution and phase noise performance. Scalar measurements achieve >80 dB dynamic range with insertion loss capability exceeding 80 dB. The spectrum analyzer delivers >80 dB instantaneous dynamic range with 3 MHz to 1 kHz resolution bandwidth filters, spurious performance better than -60 dBc on full-span sweeps, and integrated FM demodulation. Both measurement paths employ EEPROM-corrected detectors for accuracy across simultaneous insertion and return loss characterization.
Technical Specifications
• Frequency Range: 10 MHz to 20 GHz scalar; 10 MHz to 20 GHz spectrum (extendible to 110 GHz with Option 020)
• Scalar Analyzer Dynamic Range: >80 dB (insertion loss capability >80 dB with tuned input)
• Spectrum Analyzer Dynamic Range: >80 dB instantaneous
• Resolution Bandwidth: 3 MHz to 1 kHz
• Tracking Generator Frequency: DC to 46 GHz
• Frequency Resolution: 1 Hz
• Harmonic Performance: <-55 dBc
• Spurious Performance: Better than -60 dBc on full-span sweeps
• Source Architecture: VCOs above 3 GHz; integrated RF synthesizer 1 MHz to 3 GHz
• Detectors: EEPROM corrected, three-input configuration
– Key Features
• Simultaneous scalar and spectrum measurement in single platform
• CW power sweep capability
• FM demodulator with integrated loudspeaker
• Autotune mode for rapid signal location
• Optional increased output power 3 to 24 GHz
• Low phase noise synthesized source
• High sensitivity via wideband oscillators reducing front-end mixer harmonic content
– Typical Applications
• Component and subsystem RF/microwave characterization
• Routine spectrum measurements and monitoring
• Network analysis requiring insertion and return loss data
• Intermodulation and harmonic content verification
– Compatibility & Integration
Spectrum analyzer extension to 110 GHz requires Option 020 with external waveguide mixers. Tracking generator supports network measurement offset configurations.
