The Keysight (formerly Agilent) N9918A is a 26.5 GHz FieldFox handheld microwave combination analyzer designed for harsh field environments. Its base function is a cable and antenna analyzer (CAT), with configuration options to add full two-port vector network analysis (VNA) and spectrum analysis (SA) up to 26.5 GHz. The completely sealed, MIL-PRF-28800F Class 2 compliant instrument delivers benchtop-level precision in a rugged 3.0 kg portrait-orientation package, making it ideal for satellite communications, microwave backhaul, radar systems, and military communications.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | 2x USB 2.0 (Type A), 1x USB 2.0 (mini-B), LAN (100Base-T, RJ-45) |
| Display | 6.5-inch VGA (640 x 480) transflective color LED-backlit LCD |
| Internal Storage Capacity | Minimum 4 GB |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 15 to 19 VDC (4 A max), from included AC/DC adapter (100-240 VAC, 50-60 Hz) |
| Operating Temperature | -10 to 55 |
| Dimensions (W×H×D) | 292 × 188 × 72 |
| Weight | 3.0 |
General & System Characteristics
| Parameter | Value |
|---|---|
| Base Frequency Range | 30 kHz to 26.5 GHz |
| Base Function | Cable and Antenna Analyzer (CAT) |
| Configurable Measurement Modes | Vector Network Analyzer (VNA), Spectrum Analyzer (SA), Vector Voltmeter (VVM), Power Meter, Independent Signal Generator, Interference Analyzer, Variable DC Source, Built-in GPS |
| Standard Warranty | 3 years |
Cable and Antenna Analyzer (CAT)
| Parameter | Value |
|---|---|
| CAT Frequency Range | 30 kHz to 26.5 GHz |
| CAT Supported Measurements | Distance-to-fault (DTF), return loss, cable loss |
Vector Network Analyzer (VNA)
| Parameter | Value |
|---|---|
| VNA Frequency Range | 30 kHz to 26.5 GHz |
| Supported S-Parameters | S11, S21, S22, S12 (Magnitude and Phase) |
| System Impedance | 50 Ω (nominal); 75 Ω with adapter and calibration kit |
| Data Points | 101, 201, 401, 601, 801, 1001, 1601, 4001, 10001; arbitrary via SCPI |
| IF Bandwidth Settings | 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz |
| System Dynamic Range (9 to 14 GHz) | 97 dB (typical, 100 Hz IFBW) |
| System Dynamic Range (14 to 18 GHz) | 94 dB (typical, 100 Hz IFBW) |
| System Dynamic Range (18 to 20 GHz) | 90 dB (typical, 100 Hz IFBW) |
| System Dynamic Range (20 to 25 GHz) | 79 dB (typical, 100 Hz IFBW) |
| System Dynamic Range (25 to 26.5 GHz) | 70 dB (typical, 100 Hz IFBW) |
| Test Port Output Power (30 kHz to 300 kHz) | -11 dBm (typical, high power) |
| Test Port Output Power (>300 kHz to 2 MHz) | -3 dBm (typical, high power) |
| Test Port Output Power (>2 MHz to 625 MHz) | -2 dBm (typical, high power) |
| Test Port Output Power (>625 MHz to 3 GHz) | +1 dBm (typical, high power) |
| Test Port Output Power (3 GHz to 6.5 GHz) | -1 dBm (typical, high power) |
| Test Port Output Power (6.5 GHz to 9 GHz) | -2 dBm (typical, high power) |
| Test Port Output Power (9 GHz to 14 GHz) | -4 dBm (typical, high power) |
| Test Port Output Power (14 GHz to 18 GHz) | -6 dBm (typical, high power) |
| Test Port Output Power (18 GHz to 23 GHz) | -10 dBm (typical, high power) |
| Test Port Output Power (23 GHz to 26.5 GHz) | -12 dBm (typical, high power) |
| Power Sweep Range | High, low (-45 dBm nominal), and manual |
| Power Level Step Size | 1 dB steps across power range |
| Maximum Input Level (Average CW Power) | +27 dBm (0.5 W) at Port 1/2 |
| Number of Traces | 4 (Tr1, Tr2, Tr3, Tr4) |
| Trace Formats | Log magnitude, linear magnitude, VSWR, phase, Smith chart, polar, group delay, unwrapped phase, real impedance, imaginary impedance |
| Display Resolution (Return Loss) | 0.01 dB |
| Data Markers | 6 independent markers per trace (plus delta markers) |
| Supported Calibration Types | QuickCal (built-in, no external accessories required) |
Independent Source / Tracking Generator
| Parameter | Value |
|---|---|
| Tracking Generator | Full band (by option) |
Interfaces & Connectivity
| Parameter | Value |
|---|---|
| RF Port Connectors | 3.5 mm (male) |
Power & Battery
| Parameter | Value |
|---|---|
| Battery Operating Time | 3.5 hours |
Physical & Environmental
| Parameter | Value |
|---|---|
| Shock and Vibration Standard | MIL-PRF-28800F Class 2 compliant |
| Enclosure Design | Completely sealed, vertical/portrait orientation |
Spectrum Analyzer
| Parameter | Value |
|---|---|
| Spectrum Analyzer Resolution Bandwidth (RBW) | 10 Hz to 5 MHz (Option 233) |
| Spectrum Analyzer Video Bandwidth (VBW) | 1 Hz to 5 MHz (Option 233) |
| SSB Phase Noise (1 GHz, 10 kHz Offset) | -111 dBc/Hz (typical, Option 233) |
| Input Attenuator Range | 0 to 30 dB, in 5 dB steps (Option 233) |
| Trace Detectors | Normal, Positive Peak, Negative Peak, Sample, Average (RMS) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| External Reference Input | SMB (male), 50 Ω, 10 MHz |
| External Trigger Input | SMB (male), TTL / CMOS compatible |
| USB Interfaces | 2 × USB 2.0 Type-A, 1 × USB 2.0 Mini-B |
| GPS Antenna Connector (Option 307) | SMA (female), 3.3 VDC |
Environmental
| Parameter | Value |
|---|---|
| Ingress Protection Rating | IP53 (IEC 60529) |
| Operating Altitude | Up to 9,144 m (30,000 ft) |
| Environmental Testing Standard | MIL-PRF-28800F Class 2 |
Real-Time Spectrum Analyzer
| Parameter | Value |
|---|---|
| Maximum Real-Time Bandwidth (Option 350) | 10 MHz |
Technology
Vector Network Analysis / Spectrum Analysis
Applications
Aerospace & Defense, Satellite Communications, Microwave Backhaul, Radar Systems