Agilent/Keysight 89430A

The Agilent/Keysight 89430A is a vector signal analyzer engineered for complex signal characterization across 2 MHz to 1.8 GHz. This instrument delivers simultaneous time and frequency domain analysis with scalar, vector, and analog demodulation (AM/FM/PM) modes, making it suitable for communications, radar, and electronic warfare system evaluation. The analyzer accepts signals across three input impedance options: 50 Ω (−30 dBm to +24 dBm), 75 Ω (−31.761 dBm to +22.239 dBm), and 1 MΩ (−30 dBm to +28 dBm, referenced to 50 Ω).

Maximum safe input power reaches +27 dBm on 50 Ω/75 Ω and 20 V peak on 1 MΩ inputs. The A/D overload margin exceeds 5.0 dB above range.

Technical Specifications

• Frequency Range: 2 MHz to 1.8 GHz with 1.8 GHz RF Section bandwidth


• Resolution Bandwidth: 1, 3, 10 bandwidth steps plus arbitrary RBW; minimum 312.5 μHz in scalar mode


• Windows: Flat-top, Gaussian-top, Hanning, Uniform


• Detectors: Normal, Positive Peak, Sample


• Amplitude Accuracy (flat-top window): ±0.5 dB full-scale, <0.10 dB linearity (0 to −30 dBfs), <0.15 dB (−30 to −50 dBfs), <0.20 dB (−50 to −70 dBfs)


• Harmonic Distortion: 2nd order <−75 dBc (−80 dBc typical); 3rd/4th/5th order <−75 dBc (−85 dBc typical)


• Intermodulation Distortion (two tones at −6 dB FS): 2nd order <−75 dBc (−80 dBc typical); 3rd order <−75 dBc (−85 dBc typical)


• Residual Responses (50 Ω): <−75 dBfs or <−100 dBm below 1 MHz; <−80 dBfs above 1 MHz


• Alias Responses: <−80 dBfs


• Input Noise Density (50 Ω, vector/scalar sample mode): <−101 dBfs/Hz (1 kHz to 40 kHz)

Key Features

• Configurable input impedance (50 Ω, 75 Ω, 1 MΩ)


• Time-gating capability in vector mode


• Multiple window functions for spectral shaping


• Low noise floor and high dynamic range performance

Typical Applications Communications system analysis, radar signal characterization, electronic warfare measurement, modulation assessment, and signal integrity testing.