The Keysight 86118A is a dual-channel, 70 GHz remote sampling head module for high-speed electrical signal characterization on Infiniium DCA mainframes. Each of two independent channels connects to the measurement system via a 2-meter cable, enabling optimal probe placement near the device under test and minimizing signal degradation from interconnect losses. The remote head architecture delivers superior measurement fidelity for broadband waveform capture and transient analysis in high-frequency applications.
Technical Specifications
• Electrical Bandwidth: 70 GHz per channel (user-selectable 50 or 70 GHz)
• Channels: Two independent remote sampling heads
• Input Connectors: 1.85 mm (female); option H02 provides 1 mm connectors
• Cable Length: 2 meters per remote head
• Maximum Input Signal: ±2 Vdc
• Characteristic RMS Noise:
– 0.4 mV at 30 GHz bandwidth
– 1.3 mV at 70 GHz bandwidth
• Inter-channel Skew: Less than 65 ps
• Alignment Capability: Within 150 ps
• Input Impedance: 50 ohms (implied by 1.85 mm connector standard)
– Key Features
• Dual-bandwidth mode selection for optimized noise performance or high-fidelity waveform capture
• Compact remote heads (25 mm H × 53.9 mm W × 89.8 mm D) for tight DUT access
• Low inter-channel skew specification enables coherent multi-channel measurements
• Option H01 supports differential signal measurement with programmable skew adjustment (±215 ps per channel) and software control
• RF inputs require ESD protection due to high-impedance sampling node sensitivity
– Compatibility & Integration
• Compatible Mainframes: 86100A, 86100B, 86100C (Infiniium DCA/DCA-J), and 86100D (Infiniium DCA-X)
• Firmware Requirement: Minimum FlexDCA version A.06.00
• Extender Module: Not recommended for use with the 11898A extender module
