Agilent / Keysight 85081A High Impedance Input Module

The Agilent/Keysight 85081A High Impedance Input Module is an accessory designed to interface with the 8508A Vector Voltmeter. Its primary function is to provide a high input impedance measurement capability, enabling precise voltage measurements in sensitive circuits without introducing significant loading. This module is crucial for applications where minimizing disturbance to the circuit under test is paramount for accurate results. The 85081A operates in conjunction with the 8508A to form a two-channel receiver system for high-frequency voltage and phase measurements.

### Technical Specifications

* **Frequency Range:** 100 kHz to 1 GHz
* **Measurement Levels:** 10 µV to 1 V
* **Maximum Input:** 2 VAC Peak, ±50 VDC
* **Input Impedance:** High impedance
* **Compatibility:** Designed for use with the Agilent/Keysight 8508A Vector Voltmeter
* **System Configuration:** Forms a two-channel receiver system with the 8508A Vector Voltmeter
* **Measurement Capability:** Enables high-frequency voltage and phase measurements
* **Sensitivity:** Achieves a sensitivity of 10 µV through its narrowband measuring technique

### Electrical Characteristics

* **Signal Input:** Features two high-impedance probe inputs
* **Measurement Technique:** Employs a narrowband measuring technique for enhanced sensitivity

### Interfaces

* **Primary Interface:** Connects directly to the Agilent/Keysight 8508A Vector Voltmeter mainframe

### Physical Characteristics

* **Form Factor:** Input Module

### Compatibility

* **Host Instrument:** Agilent/Keysight 8508A Vector Voltmeter
* **Note:** The 85081A is not typically sold separately and is intended for use with the 8508A mainframe. It is considered an accessory for the 8508A.

### Usage Notes

* The 85081A, along with accessories like the 11570A kit, can be used to make measurements in a 50-ohm Type N coaxial system.
* Specifications are warranted over a temperature range of 0 to 55 °C.
* Components within the module are susceptible to damage from electrostatic discharge (ESD).
* The 85081A is an obsolete product. While no longer sold by Keysight, it may still be supported, with resources like free enhanced self-support available via the Keysight website or contact center. Repair and calibration services may also be available.

Why Choose Aumictech for the Agilent/Keysight 85081A High Impedance Input Module?
At Aumictech, we specialize in sourcing and supplying high-quality RF test equipment and accessories. Whether you need to ensure the integrity of sensitive circuit measurements, perform precise voltage and phase analysis, or require minimal circuit disturbance for your applications, our team ensures that the Agilent/Keysight 85081A High Impedance Input Module, when available, delivers reliable performance for your specific engineering and laboratory needs.