Agilent/Keysight 3570A

The Agilent/Keysight 3570A is a network analyzer that measures amplitude and phase response of two-port linear networks across a frequency range of 50 Hz to 13 MHz. This dual-channel instrument characterizes absolute transfer functions, compares network performance, and supports optional group delay and offset measurements with limit test capability. The 3570A delivers 100 dB dynamic range (200 Hz to 13 MHz) and selectable bandwidths of 10 Hz, 100 Hz, and 3 kHz to optimize measurement resolution across applications ranging from filter characterization to impedance analysis.

Technical Specifications

Frequency Range: 50 Hz to 13 MHz Dynamic Range: 100 dB (200 Hz to 13 MHz) Measurement Channels: Two identical channels Selectable Bandwidths: 10 Hz, 100 Hz, 3 kHz Amplitude Stability (8 hours, 25°C ±1°C): ±0.05 dB for frequencies above 20 dB Amplitude Temperature Coefficient (20–30°C): ±0.02 dB/°C (100 Hz and 3 kHz BW); ±0.06 dB/°C (10 Hz BW) Phase Accuracy (25°C ±5°C): ±0.2° phase linearity (Channel B within 6 dB of Channel A) Input Impedance: 1 MΩ ±2%, shunted by <30 pF Input Signal Range: 1 Vrms to 1 µVrms Input Overload Protection: 15 Vrms; maximum dc input 50 Vdc Output Impedance: 50 Ω or 75 Ω Maximum Output: 1 Vrms into 50 Ω or 75 Ω load Power Requirements: 100 V, 120 V, 220 V, or 240 V ±10% / +5%; 48–66 Hz; 230 VA maximum

Key Features

• Two identical measurement channels for simultaneous dual-path characterization


• Absolute transfer function measurement or network-to-network comparison


• Optional group delay and offset measurements


• Limit test functionality for pass/fail verification


• Fully programmable via isolated General Purpose Interface Bus (optional)


• Capacitive input coupling; frame ground referenced


• Automatic thermal cutout at +75°C internal temperature

Typical Applications Filter and impedance network verification, two-port device characterization, RF and microwave circuit gain and phase profiling, component tolerance screening, and transfer function comparison during design validation.

Compatibility & Integration The 3570A operates in conjunction with HP 3320A/B Frequency Synthesizer or HP 3330A/B Automatic Synthesizer and is a core measurement module within the 3040A, 3041A, and 3042A system platforms.