Agilent / Keysight N9340B Handheld RF Spectrum Analyzer, 3 GHz

The Agilent/Keysight N9340B is a portable handheld RF spectrum analyzer delivering field-capable signal analysis from 100 kHz to 3 GHz. Built for demanding environments, this instrument combines rugged construction with a 6.5-inch color display to support real-time spectrum monitoring, signal identification, and communication system validation. The N9340B achieves -124 dBm displayed average noise level (DANL) with 30 Hz resolution bandwidth, or -144 dBm with the optional PA3 preamplifier, enabling detection of weak signals across a broad frequency span.

Technical Specifications

• Frequency Range: 100 kHz to 3 GHz (tunable down to 9 kHz)


• DANL: -124 dBm (RBW = 30 Hz, 10 MHz < fc ≤ 1.5 GHz); -144 dBm with PA3 option


• Amplitude Accuracy: ±1.5 dB


• Resolution Bandwidth: 30 Hz to 1 MHz (1-3-10 sequence)


• Video Bandwidth: 3 Hz to 1 MHz


• Sweep Time: < 0.1 seconds full span; 10 ms to 1000 s variable


• Phase Noise: < –87 dBc/Hz at 30 kHz offset


• Input Attenuator: 0 to 51 dB, 1 dB steps


• Display: 6.5-inch TFT color LCD, 640 × 480 pixels, auto-brightness, backlit keys


• Power Consumption: 13 W typical; accepts 90–263 VAC (50–60 Hz) or 12–18 VDC

Key Features

• Adjacent Channel Power Ratio (ACPR) and Spectrum Emission Mask (SEM) measurements


• Field strength measurements with user-definable antenna factors


• Spectrogram display for signal monitoring over time


• Pass/Fail testing with custom masks


• Optional tracking generator (TG3): 5 MHz to 3 GHz, -25 to 0 dBm output


• Optional 20 dB preamplifier (PA3): 1 MHz to 3 GHz


• Optional demodulation analysis (AMA/DMA): AM/FM and ASK/FSK


• Optional IBOC measurement (IBC) for HD Radio


• Optional xDSL measurement (XDM) for ADSL/VDSL networks


• Unattended monitoring and signal capture for intermittent events (INM option)


• USB 2.0, LAN (10 Base-T), and external trigger/reference connectivity

Typical Applications Field testing and spectrum monitoring for wireless communications, EMI/RMI troubleshooting, signal compliance verification, and network performance analysis.

Compatibility & Integration Remote control via LAN (SCPI), USB host for data storage, and headphone output for audio demodulation monitoring.