Agilent/Keysight E1664A

The Keysight/Agilent 11664A is an RF detector engineered for envelope detection of 27.8 kHz modulated signals across microwave frequencies. This instrument connects directly to scalar network analyzers in the 8757, 8756, and 8755 series, providing critical detection and measurement capabilities for AC-mode operation. The detector operates across a wide frequency span and accommodates input power levels from +16 dBm to -60 dBm, making it suitable for both high-power and low-level signal characterization. With a 50-ohm input impedance and N-male connector interface, the 11664A integrates into standard test setups. Maximum input power is rated at +20 dBm (100 mW).

– Technical Specifications

• Frequency Range: 10 MHz to 18 GHz
• Dynamic Range: +16 dBm to −60 dBm
• Maximum Input Power: +20 dBm (100 mW)
• Input Impedance: 50 ohms
• Connector Type: N-Male
• Modulation Detection: 27.8 kHz envelope detection
• Operating Mode: AC only

– Key Features

• Wideband detection from 10 MHz through 18 GHz
• Wide dynamic range spanning 76 dB
• Dedicated envelope detector for modulated signal analysis
• 50-ohm matched input for minimal reflection loss
• Compact detector head with standard RF connector

– Typical Applications

• Scalar network analysis on 8757, 8756, and 8755 analyzers
• Modulated signal envelope detection
• S-parameter and transmission/reflection measurements
• Frequency response characterization of RF/microwave components

– Compatibility & Integration

The 11664A detector is purpose-built for integration with Keysight/Agilent scalar network analyzers. It operates exclusively in AC mode and requires a compatible host analyzer to function. A related model, the 11664E detector, extends the frequency range to 26.5 GHz with an APC-3.5 mm connector for applications requiring higher-frequency coverage. Proper grounding is essential for safe operation and signal integrity.