N9951A

Keysight Technologies (Agilent HP)Impedance

The Keysight N9951A is a member of the FieldFox family of handheld microwave analyzers, operating up to 44 GHz. It serves as a highly integrated handheld solution that can be configured as a cable and antenna analyzer, vector network analyzer, spectrum analyzer, and more, offering laboratory-grade performance in a rugged, portable form factor designed for field use.

Cable and Antenna Analysis Microwave RF and Microwave Spectrum Analysis Vector Network Analyzer

Specifications

General

Parameter	Value
Display	6.5-inch transflective color LCD (640 x 480 pixels)

Physical

Parameter	Value
Power Supply	15 VDC (external AC to DC adapter, 100 to 240 VAC, 50 to 60 Hz input; 10.8 V, 4.6 Ah Lithium-Ion battery)
Operating Temperature	-10 to 55 °C
Dimensions (W×H×D)	292 mm x 188 mm x 72 mm
Weight	3.2 kg

RF Specifications

Parameter	Value
Cable and Antenna Analyzer (CAT) Frequency Range	300 kHz to 44 GHz
Vector Network Analyzer (VNA) Frequency Range	300 kHz to 44 GHz
Spectrum Analyzer Frequency Range (Option 233)	9 kHz to 44 GHz
Aging Rate	±1 ppm/year
Frequency Temperature Stability	±0.5 ppm (-10 °C to 55 °C)

Vector Network Analyzer

Parameter	Value
VNA System Dynamic Range (300 kHz to 9 GHz)	110 dB (typical)
VNA System Dynamic Range (9 GHz to 26.5 GHz)	100 dB (typical)

Cable and Antenna Analyzer

Parameter	Value
CAT Sweep Resolution	101 to 10001 points
CAT Measurements	Distance-to-Fault, Return Loss, Cable Loss, VSWR, 1-Port Cable Loss

Spectrum Analyzer

Parameter	Value
SA Resolution Bandwidth (RBW) Range	10 Hz to 5 MHz (in 1-3-10 sequence)
SA Video Bandwidth (VBW) Range	1 Hz to 5 MHz
SA DANL (preamp off, 2 GHz)	-145 dBm/Hz (typical)
SA Phase Noise (10 kHz offset at 1 GHz)	-111 dBc/Hz (typical)
RF Input Attenuation Range (Option 233)	0 to 40 dB (in 5 dB steps)
Preamplifier Frequency Range (Option 235)	100 kHz to 44 GHz

Physical & Environmental

Parameter	Value
Test Port Connectors	2.4 mm male
IP Rating	IP53
MIL-SPEC Compliance	MIL-PRF-28800F Class 2
Storage Temperature Range	-51 °C to 71 °C
Operating Humidity	95% relative humidity at 40 °C

Power Specifications

Parameter	Value
Battery Operational Time	4 hours (typical)
Battery Charge Time	4 hours (100% charge, unit off)

Cable and Antenna Analyzer (CAT)

Parameter	Value
CAT Sweep Points	101, 201, 401, 601, 801, 1001, 1601, 4001, 10001 (user selectable)

Vector Network Analyzer (Option 210)

Parameter	Value
VNA Sweep Points	101, 201, 401, 601, 801, 1001, 1601, 4001, 10001 (user selectable)
VNA S-Parameters	S11, S21, S12, S22 (Option 210)

Spectrum Analyzer (Option 233)

Parameter	Value
SA DANL (preamp on, 2 GHz)	-163 dBm/Hz (typical)
SA Third-Order Intercept (TOI)	+15 dBm (nominal, at 2.4 GHz)
SA Phase Noise (100 kHz offset at 1 GHz)	-110 dBc/Hz (typical)

Real-Time Spectrum Analyzer (Option 350)

Parameter	Value
RTSA Bandwidth	10 MHz (Option 350)

I/Q Analyzer (Option 351)

Parameter	Value
I/Q Analyzer Bandwidth	10 MHz (Option 351)

GPS Receiver (Option 330)

Parameter	Value
GPS Position Accuracy	< 2.5 m (typical, CEP 50%)

Inputs & Outputs

Parameter	Value
External Trigger Input Connector	BNC, female
External Reference Input Connector	BNC, female, 10 MHz
Reference Output Connector	BNC, female, 10 MHz

RF Input & Power Handling

Parameter	Value
Maximum Input Power (Port 1/2)	+27 dBm (0.5 W)
Maximum DC Input Voltage	±40 VDC

Vector Voltmeter

Parameter	Value
Vector Voltmeter Frequency Range (Option 308)	300 kHz to 44 GHz

Power Meter

Parameter	Value
Built-In Power Meter Frequency Range (Option 310)	9 kHz to 44 GHz

Storage & Interfaces

Parameter	Value
Internal Storage	4 GB
External Storage Type	SD/SDHC card, USB Flash Drive
USB Host Ports	2 x USB 2.0 Type-A
LAN Interface Port	100Base-T RJ-45

Power Supply

Parameter	Value
AC Adapter Input	100 to 240 VAC, 50 to 60 Hz
AC Adapter Output	15 VDC, 4.0 A
Battery Specification	Lithium-ion, 10.8 V, 4.6 Ah, 50 Wh

Technology

Handheld Microwave Analyzer

Applications

RF and Microwave Field Testing