The Keysight (formerly Agilent/HP) N4691B is a 2-port microwave electronic calibration (ECal) module that operates from 300 kHz to 26.5 GHz. It provides fast, accurate full two-port VNA calibrations with a single connection, reducing connector wear and operator error compared to traditional mechanical calibration kits. Featuring solid-state switching for reliable performance, the N4691B interfaces directly with Keysight PNA and ENA series network analyzers via USB, and can be used with legacy analyzers using an optional 85097B interface kit.
Specifications
Physical
| Parameter | Value |
|---|---|
| Power Supply | USB powered |
General Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 300 kHz to 26.5 GHz |
| Number of Ports | 2 |
| Connector Type | 3.5 mm |
| Impedance | 50 Ω |
RF Performance Characteristics
| Parameter | Value |
|---|---|
| Directivity (300 kHz to 2 MHz) | 31 dB |
| Directivity (2 to 10 MHz) | 41 dB |
| Directivity (10 to 500 MHz) | 46 dB |
| Directivity (500 MHz to 2 GHz) | 56 dB |
| Directivity (2 to 10 GHz) | 54 dB |
| Directivity (10 to 20 GHz) | 48 dB |
| Directivity (20 to 26.5 GHz) | 44 dB |
| Source Match (300 kHz to 2 MHz) | 29 dB |
| Source Match (2 to 10 MHz) | 36 dB |
| Source Match (10 to 500 MHz) | 41 dB |
| Source Match (500 MHz to 2 GHz) | 47 dB |
| Source Match (2 to 10 GHz) | 45 dB |
| Source Match (10 to 20 GHz) | 44 dB |
| Source Match (20 to 26.5 GHz) | 40 dB |
| Reflection Tracking (300 kHz to 2 MHz) | ±0.11 dB |
| Reflection Tracking (2 to 10 MHz) | ±0.06 dB |
| Reflection Tracking (10 to 500 MHz) | ±0.05 dB |
| Reflection Tracking (500 MHz to 2 GHz) | ±0.02 dB |
| Reflection Tracking (2 to 10 GHz) | ±0.03 dB |
| Reflection Tracking (10 to 20 GHz) | ±0.04 dB |
| Reflection Tracking (20 to 26.5 GHz) | ±0.05 dB |
| Transmission Tracking (300 kHz to 2 MHz) | ±0.14 dB |
| Transmission Tracking (2 to 10 MHz) | ±0.11 dB |
| Transmission Tracking (10 to 500 MHz) | ±0.07 dB |
| Transmission Tracking (500 MHz to 2 GHz) | ±0.05 dB |
| Transmission Tracking (2 to 10 GHz) | ±0.07 dB |
| Transmission Tracking (10 to 20 GHz) | ±0.10 dB |
| Transmission Tracking (20 to 26.5 GHz) | ±0.12 dB |
| Load Match (300 kHz to 2 MHz) | 26 dB |
| Load Match (2 to 10 MHz) | 31 dB |
| Load Match (10 to 500 MHz) | 37 dB |
| Load Match (500 MHz to 2 GHz) | 45 dB |
| Load Match (2 to 10 GHz) | 49 dB |
| Load Match (10 to 20 GHz) | 45 dB |
| Load Match (20 to 26.5 GHz) | 40 dB |
Configuration & Options
| Parameter | Value |
|---|---|
| Connector Options | Option F0F (female/female), Option M0F (male/female), Option M0M (male/male) |
Performance
| Parameter | Value |
|---|---|
| Maximum Input Power (Damage Level) | +20 dBm |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 °C to +70 °C |
Calibration & Compliance
| Parameter | Value |
|---|---|
| Accredited Calibration Options | ISO 17025 (Option 1A7), ANSI Z540-1 (Option A6J) |
Technology
Electronic Calibration (ECal)
Applications
Vector Network Analyzer (VNA) Calibration