Agilent / Keysight U1818A Active Differential Probe, 100 kHz to 7 GHz

The Keysight U1818A is an active differential probe designed for high-frequency differential signal measurements, offering a bandwidth from 100 kHz to 7 GHz. This probe is engineered for R&D and quality assurance engineers involved in RF/Microwave and high-speed digital design and validation within the wireline, wireless communications, and aerospace/defense sectors. Its design emphasizes high differential input impedance to minimize circuit loading effects. The U1818A is directly compatible with Keysight’s network, spectrum, and signal source analyzers, facilitating efficient defect detection and leveraging the full capabilities of these instruments.

### Technical Specifications

**Bandwidth:**
* 100 kHz to 7 GHz

**Frequency Response:**
* Broad bandwidth with a flat response of +/- 1.5 dB, ensuring excellent measurement accuracy.

**Noise Floor:**
* Less than -130 dBm/Hz at 10 MHz to 7 GHz (U1818A)
* Less than -130 dBm/Hz at 10 MHz to 12 GHz (U1818B)
* Enables measurements at low signal amplitudes.

**Input Characteristics:**
* High differential input impedance.

**Compatibility:**
* Directly compatible with Keysight network analyzers, spectrum analyzers, and signal source analyzers.
* Can be used with most Keysight probe accessories, including:
* Extreme temperature extension cables
* In-line attenuator kits
* Minimum loss attenuator pads
* DC blocking capacitors
* Probe positioners
* Specific recommended probe heads include:
* N5380B 12 GHz differential SMA adapter
* N5381B 12 GHz InfiniiMax differential solder-in probe head
* N2839A InfiniiMax II 12 GHz differential browser
* N5425B 12 GHz InfiniiMax ZIF-solder-in probe head
* N5426A 12 GHz InfiniiMax ZIF-tip kit of 10

**Powering:**
* Convenient biasing from Keysight’s RF and microwave instruments probe power port or a benchtop power supply for user flexibility.

**Measurement Applications:**
* Performing high-frequency in-circuit measurements using network, spectrum, and signal source analyzers.
* Measuring step response in high-speed digital designs when used with a network analyzer.
* Measuring insertion loss between DUTs with a network analyzer.
* Accurate measurement of phase noise and jitter when used with a signal source analyzer.
* RF troubleshooting when used with a signal/spectrum analyzer.
* General purpose RF measurements.
* Design, test, and validation.
* Oscillator and PLL testing.
* Measuring single-ended signals can also be performed, offering advantages like common-mode rejection and low circuit loading.

### Physical Characteristics

* Compact and lightweight design.

### Interfaces

* The probe outputs a single-terminated 50-ohm cable for connection to an oscilloscope channel.

### Why Choose Aumictech for Keysight U1818A Active Differential Probe?

At Aumictech, we specialize in supplying high-performance test and measurement equipment. Whether you need to perform precise high-frequency differential measurements, validate complex high-speed digital designs, or troubleshoot RF circuits, our team ensures the Keysight U1818A Active Differential Probe delivers maximum performance for your application.