The Anritsu SM6629 is a pulse modulator test set delivering source and receiver modulation capabilities across 70 kHz to 40 GHz. Operating as a slave unit to Anritsu VectorStar VNAs (MS4642B/MS4644B with Options 35 and 42), it enables advanced pulse characterization and high-frequency signal manipulation without standalone operation.
Technical Specifications
• Frequency Range: 70 kHz to 40 GHz (measurement range limited by connected VNA)
• Modulation Architecture: Low-band and high-band signal paths split at 2.5 GHz with reference coupling for ratioed measurements
• Internal Signal Generators: Four integrated generators providing multiple stimulus methods
• Control Polarity: Low < 1 V for RF ON; High 3.3 V ± 10% for RF OFF
• Operating Temperature: 25 °C ± 5 °C (standard specs); 23 °C ± 3 °C with 0.1 dB relative to normalization at 10 Hz IF bandwidth
• Physical Dimensions: 109 mm height (width and depth per user manual)
– Key Features
• Dual modulation paths (source and receiver) for comprehensive pulse analysis
• Pulse measurement modes: profile, point-in-pulse, pulse-to-pulse, continuous point-in-pulse, continuous profiling
• Direct Access Loops integration for seamless VNA connectivity
• K Connector and V Connector RF interfaces (Anritsu trademark designations)
• b2 Output and b2 Input ports on SM6629 and SM6631 models
• Supplied terminators for unused VNA a1 and a2 outputs
– System Integration
The SM6629 requires Anritsu MS4640B Series VNAs equipped with Option 35 (IF Digitizer), Option 42 (PulseView™), and Direct Access Loops. It is not a standalone instrument. Typical cabling includes RF coaxial cables, SMA flex cable sets, and termination components.
– Typical Applications
Advanced pulse characterization of high-frequency components and subsystems requiring modulation-domain measurements, point-in-pulse analysis, and dynamic RF signal evaluation in radar, defense, and broadband communication systems.
