The Marconi IFR Aeroflex 6845A is a microwave system analyzer integrating a synthesized source, three-input scalar analyzer, and spectrum analyzer into a single platform. It delivers routine spectrum measurements, network analysis, and frequency translation device testing without requiring multiple instruments. The scalar analyzer provides ±2% measurement accuracy with simultaneous insertion and return loss display on color screen, while the spectrum analyzer achieves spurious measurements better than -60 dBc on full-span sweeps. Low-distortion architecture with wideband oscillators enables high sensitivity across microwave frequencies. An integral frequency counter and FM demodulator with built-in loudspeaker facilitate signal identification and interfering transmission location.
Technical Specifications
Frequency Range
• Scalar Analyzer: 10 MHz to 46 GHz
• Spectrum Analyzer: Up to 46 GHz
• Extendible to 110 GHz with external waveguide mixers
Scalar Analyzer
• Three-input configuration with EEPROM-corrected detectors
• Measurement Accuracy: ±2%
• Linearity: ±0.2 dB
• Dynamic Range: +5 dBm to -65 dBm
• Insertion Loss Measurements: >80 dB possible with tuned input
• Simultaneous insertion and return loss measurement display
Spectrum Analyzer
• Resolution Bandwidth: 1 kHz to 3 MHz
• Instantaneous Dynamic Range: >80 dB
• Spurious Performance: Better than -60 dBc on full-span sweeps
• Integral frequency counter and FM demodulator with loudspeaker
Synthesized Source
• 1 Hz frequency resolution
• Harmonic Performance: <-55 dBc (70 MHz to 24 GHz)
• Optional output power increase from 3 to 24 GHz
• Low phase noise architecture
• Sweep Modes: CW, swept source, tracking generator, offset tracking
• Modulation: CW power sweep, optional FM and pulse modulation
– Key Features
• Continuous full-band sweeps for harmonic and spurious measurements
• Wide dynamic range for accurate full-span sweeps
• High sensitivity facilitated by wideband oscillators reducing front-end mixer harmonic number
– Compatibility & Integration
• GPIB: IEEE 488.1 and 488.2 compatible
• RS232 interface standard
• External mixer extension to 110 GHz
• Optional step attenuators available
• Operating Temperature: 0 to +50°C
• Power Supply: 300 W maximum at 50 to 60 Hz
