The Keysight Technologies (formerly Agilent HP) FieldFox N9915A is a handheld microwave combination analyzer operating from 30 kHz to 9 GHz. Designed for high accuracy in the field, it functions as a cable and antenna analyzer (CAT) by default, and can be configured as a full 2-port vector network analyzer (VNA), a spectrum analyzer, and more. Featuring a completely sealed, rugged enclosure that complies with MIL-PRF-28800F Class 2, the N9915A delivers benchtop-level performance and features like QuickCal for calibration without external accessories, making it ideal for military, radar, satellite, and telecommunications field testing.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | LAN, USB 2.0 host (2 ports), USB 2.0 device (1 port), micro-SD slot, external reference, GPS antenna, audio jack |
| Display | 6.5-inch transflective color LCD, 640 x 480 resolution |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 to 240 VAC, 50 to 60 Hz (AC/DC adapter); 15 to 19 VDC input; 14 W typical power consumption |
| Operating Temperature | -10 to +55 °C |
| Dimensions (W×H×D) | 292 x 188 x 72 mm |
| Weight | 3.0 kg (6.6 lbs) |
General Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 30 kHz to 9 GHz |
Vector Network & Cable/Antenna Analyzer (VNA/CAT)
| Parameter | Value |
|---|---|
| Cable and Antenna Analyzer (CAT) Measurements | Distance-to-fault (DTF), return loss, cable loss |
| Vector Network Analyzer (VNA) S-parameters | S11, S21, S22, S12 (magnitude and phase) |
| System Dynamic Range | 100 dB (typical, >300 kHz to 9 GHz, 10 Hz IFBW, 100-point average) |
| Trace Noise | 0.004 dB rms (typical, up to 9 GHz) |
| VNA Data Points | 101, 201, 401, 601, 801, 1001, 1601, 4001, 10,001 (arbitrary points settable via SCPI) |
| IF Bandwidth Settings | 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz |
| System Impedance | 50 ohm nominal (75 ohm with adapter and calibration kit) |
| Test Port Output Power (30 kHz to 300 kHz) | -11 dBm (nominal, Port 1 or 2, high power) |
| Test Port Output Power (>300 kHz to 2 MHz) | -3 dBm (nominal, Port 1 or 2, high power) |
| Test Port Output Power (>2 MHz to 625 MHz) | -2 dBm (nominal, Port 1 or 2, high power) |
| Test Port Output Power (>625 MHz to 3 GHz) | +1 dBm (nominal, Port 1 or 2, high power) |
| Test Port Output Power (>=3 to 6.5 GHz) | -1 dBm (nominal, Port 1 or 2, high power) |
| Test Port Output Power (>=6.5 to 9 GHz) | -2 dBm (nominal, Port 1 or 2, high power) |
| Output Power Ranges | High, low, and manual |
| Low Power Setting | -45 dBm (nominal) |
| Power Step Size | 1 dB steps (flat power available across whole frequency span, nominal) |
| Receiver Compression | +10 dBm (typical, Port 1 or 2, 0.1 dB compression, >=500 MHz) |
| Maximum RF Input Level (Port 1 or 2) | +27 dBm (0.5 watts) average CW power |
| Maximum DC Input (Port 1 or 2) | ±50 VDC |
| Immunity to Interfering Signals | +16 dBm (nominal) |
| Measurement Speed | 850 µs/point (S11 & S21, >=30 kHz, enhanced response cal, 100 kHz IFBW, 1001 points) |
| VNA Number of Traces | Four (Tr1, Tr2, Tr3, Tr4) |
| VNA Trace Formats | Log magnitude, linear magnitude, VSWR, phase, Smith chart, polar, group delay, unwrapped phase, real impedance, imaginary impedance |
| Sweep Trigger Modes | Continuous, single |
| VSWR Display Resolution | 0.01 |
| Data Markers | 6 independent markers per trace (with delta markers) |
| Marker Formats | Trace format, [Real + Imag] (Smith/polar), [Mag and Phase] (Smith/polar) |
| Marker Types | Normal, delta, data trace, memory trace |
| Marker Coupling | On/Off |
Spectrum Analyzer (SA) Specifications
| Parameter | Value |
|---|---|
| Spectrum Analyzer Spur-Free Dynamic Range | >=105 dB |
| Spectrum Analyzer Tracking Generator | Full band tracking generator available |
Power and Battery
| Parameter | Value |
|---|---|
| Battery Operating Time | 4 hours (typical) |
| Battery Chemical Composition | Lithium-ion |
Physical and Environmental Properties
| Parameter | Value |
|---|---|
| Storage Temperature Range | -51 to +71 °C |
Compliance & Military Standards
| Parameter | Value |
|---|---|
| Enclosure Environmental Compliance | Sealed enclosure meeting MIL-PRF-28800F Class 2 |
Software and Licensing Options
| Parameter | Value |
|---|---|
| Standard Warranty | 3 years |
| Built-In GPS Option | Available (requires external GPS antenna) |
| Vector Voltmeter (VVM) Option | Available |
| Built-In Power Meter Option | Available |
| Interference Analyzer Option | Available |
| Independent Signal Generator Option | Available |
| Variable DC Source Option | Available |
Spectrum Analyzer
| Parameter | Value |
|---|---|
| Spectrum Analyzer Resolution Bandwidth (RBW) Range | 1 Hz to 5 MHz |
| Spectrum Analyzer Video Bandwidth (VBW) Range | 1 Hz to 5 MHz |
| Spectrum Analyzer SSB Phase Noise at 1 GHz (10 kHz offset) | -106 dBc/Hz (-111 dBc/Hz typical) |
| Spectrum Analyzer SSB Phase Noise at 1 GHz (100 kHz offset) | -115 dBc/Hz (-119 dBc/Hz typical) |
| Spectrum Analyzer DANL at 1 GHz (Preamplifier Off) | -137 dBm (typical -139 dBm) |
| Spectrum Analyzer DANL at 1 GHz (Preamplifier On, Option 235) | -154 dBm (typical -156 dBm) |
| Spectrum Analyzer DANL at 9 GHz (Preamplifier Off) | -132 dBm (typical -136 dBm) |
| Spectrum Analyzer DANL at 9 GHz (Preamplifier On, Option 235) | -149 dBm (typical -153 dBm) |
| Spectrum Analyzer TOI at 2.4 GHz | +15 dBm (typical) |
Frequency Reference
| Parameter | Value |
|---|---|
| Frequency Reference Stability over Temperature | ±0.5 ppm (-10 to 55 °C) |
| Frequency Reference Aging Rate | ±1.0 ppm/year |
| External Reference Input Frequency | 10 MHz |
| External Reference Input Level | -3 to +10 dBm |
Power Supply
| Parameter | Value |
|---|---|
| Power Consumption | 14 W (typical) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| RF Port 1 Connector | Type-N female, 50 Ω |
| RF Port 2 Connector | Type-N female, 50 Ω |
| USB Host Ports | 2 x USB 2.0 Type-A |
| USB Device Port | 1 x USB 2.0 Type-Mini B |
| LAN Port | 100Base-T, RJ-45 |
| External Reference Input Connector | BNC female, 50 Ω |
| External Reference Output Connector | BNC female, 50 Ω |
| Trigger Input Connector | BNC female, 10 kΩ nominal |
| GPS Antenna Connector | SMA female |
Environmental & Physical
| Parameter | Value |
|---|---|
| Ingress Protection Rating | IP53 |
| Maximum Operating Altitude | 9,144 m (30,000 ft) |
| Maximum Storage Altitude | 15,240 m (50,000 ft) |
| Environmental Compliance | MIL-PRF-28800F Class 2 |
| Explosive Atmosphere Compliance | MIL-STD-810G, Method 511.5, Procedure I |
Power
| Parameter | Value |
|---|---|
| External DC Input Voltage | 15 to 19 VDC |
| Battery Charge Time (with unit off) | 4 hours |
DC Bias Source (Option 309)
| Parameter | Value |
|---|---|
| DC Bias Voltage Range (Option 309) | +1 to +32 V |
| DC Bias Voltage Resolution (Option 309) | 0.1 V |
| DC Bias Maximum Current (Option 309) | 650 mA |
| DC Bias Maximum Power (Option 309) | 7 W |
Real-Time Spectrum Analyzer (Option 350)
| Parameter | Value |
|---|---|
| Real-Time Spectrum Analyzer Option | Option 350 |
| RTSA Maximum Bandwidth | 10 MHz |
| RTSA Minimum Signal Duration for 100% POI | 12.2 μs |
| RTSA Minimum Signal Duration for Detection | 22 ns |
I/Q Analyzer (Option 351)
| Parameter | Value |
|---|---|
| I/Q Analyzer Option | Option 351 |
| I/Q Analyzer Maximum Bandwidth | 10 MHz |
Vector Network Analyzer
| Parameter | Value |
|---|---|
| VNA Supported Calibrations | CalReady, QuickCal, 1-port OSL, 2-port SOLT, Enhanced Response |
Noise Figure Analyzer (Option 356)
| Parameter | Value |
|---|---|
| Noise Figure Analyzer Option | Option 356 |
ERTA (Option 209)
| Parameter | Value |
|---|---|
| Extended Range Transmission Analysis Option | Option 209 |