The Agilent/Keysight 8757D is a scalar network analyzer delivering precise amplitude measurements across microwave frequencies up to 110 GHz. It measures insertion loss, gain, return loss, SWR, and power across coaxial and waveguide paths, serving laboratory and production environments with dynamic range to 83 dB.
Technical Specifications
Frequency Range
• Coaxial: up to 50 GHz
• Waveguide: up to 110 GHz (with compatible signal generator)
• Standard coaxial: 10 MHz to 40 GHz
Measurement Range
• +16 dBm to −60 dBm
• Dynamic range: 75 dB standard; 83 dB extended (with high-power signal generator option)
Display & Resolution
• Four independent display channels
• Three standard detector inputs; optional fourth available
• Vertical resolution: 0.003 dB (dBm), 0.006 dB (dB), 0.01 dB (normalized)
• Selectable measurement points: 101 to 1601 per trace
• High-resolution color display (CRT standard; LCD upgrade option available)
Data & Analysis
• Trace averaging: 2, 4, 8, 16, 32, 64, 128, or 256 successive traces
• Linear moving average smoothing: aperture 0.1% to 20% of trace width
• Adaptive normalization with frequency span interpolation
• Limit lines for channels 1 and 2 (traces ≤401 points)
• Cursor functions: max/min search, n dB search, bandwidth measurement
• AUX voltage measurement: −10 to +10 V input with ±60 mV maximum error
Data Storage & Output
• Internal save/recall registers for states and measurement data
• External GPIB disk drive compatibility (LIF format: binary or ASCII)
• HP 9000 series 200/300 computer compatibility
• Internal plotter/printer buffer
Electrical
• AC or DC detection modes
• Power: 48 to 66 Hz, 100/120/220/240 V ±10%; typically 155 VA
– Key Features
• Variable sweep time based on trace count and point density
• Dedicated GPIB (IEEE-488) control interface
• Adaptive calibration for reduced frequency spans
– Typical Applications
Insertion loss, gain, and return loss characterization of microwave components; SWR measurement in component qualification and production test.
– Compatibility & Integration
Works with Agilent/Keysight signal sources and detector modules to form complete measurement systems. GPIB interface enables integration with HP 9000 series computers and external storage.
