The HP/Agilent 16085B is a terminal adapter that converts 4-terminal pair configurations to APC-7 coaxial connectors, enabling impedance measurement instruments to interface with component test fixtures. Designed for discrete radial and axial lead components as well as chip components, the 16085B provides stable, well-defined connections that minimize signal distortion and support accurate impedance measurements across DC to 40 MHz.
Technical Specifications
Electrical Characteristics
• Frequency range: DC to 40 MHz
• DC bias voltage: ±40 V maximum
• Residual inductance (Lo): 32 nH ± 5 nH
• Stray capacitance (Co): 1.7 pF ± 0.3 pF
• Residual resistance (Ro): Less than 0.04(1 + √f) Ω at test frequency f in MHz
Connectors & Interfaces
• Input: 4-terminal pair configuration
• Output: APC-7 coaxial connector
• Dimensions: 178 mm × 90 mm × 114 mm (7.0 in × 3.5 in × 4.5 in)
• Weight: Approximately 550 g (1.2 lbs)
• Operating temperature: 0 °C to 55 °C
– Key Features
The 16085B minimizes parasitic effects with tightly controlled residual parameters: inductance of 32 nH ±5 nH and capacitance of 1.7 pF ±0.3 pF. Resistive losses remain predictable across the measurement band. The adapter accepts ±40 V DC bias, accommodating bias-dependent measurements on semiconductors and other active devices.
– Typical Applications
Ideal for characterizing discrete components, including resistors, inductors, capacitors, and semiconductors with radial or axial leads. Supports chip component measurements when paired with appropriate fixtures.
– Compatibility & Integration
Compatible Instruments: Agilent 4194A, 4263B, 4278A, 4279A, 4284A, 4285A, 4288A, E4980A, E4981A
Compatible Test Fixtures: 16092A, 16093A, 16093B
Maintenance: Clean the APC-7 connector contact surface periodically with a lint-free cloth; isopropyl alcohol may be used. Replace the RF connector contact (PN 1250-0816) every 1000 connections/disconnections or upon visible wear or damage.
