The HP/Agilent N9935A, N9936A, N9937A, and N9938A are FieldFox handheld microwave spectrum analyzers engineered for field deployment with bench-level measurement accuracy. These instruments deliver portable spectrum analysis, power measurement, interference analysis, and reflection characterization across frequency ranges up to 26.5 GHz, making them suitable for satellite communications, microwave backhaul, military systems, and radar applications.
Technical Specifications
Frequency Coverage
• N9935A: 5 kHz to 9 GHz
• N9936A: 5 kHz to 14 GHz
• N9937A: 5 kHz to 18 GHz
• N9938A: 5 kHz to 26.5 GHz
Amplitude and Dynamic Performance
• Amplitude accuracy: ±0.5 dB across full band, no warm-up required
• Operating temperature range: -10 to +55 °C (14 to 131 °F)
• Spur-free dynamic range: ≥105 dB
• Phase noise: -111 dBc/Hz at 10 kHz offset
– Key Features
Measurement Capabilities
• Spectrum analysis with core analyzer functions
• Spectrogram display and signal recording for interference identification
• Built-in power meter: 100 kHz to 9/14/18/26.5 GHz (model dependent)
• USB power sensor support: 9 kHz to 24 GHz (sensor dependent)
• Average and pulse power measurement
• Channel power, occupied bandwidth, and adjacent channel power ratio analysis
• Time-gated FFT measurements for pulsed RF signals
– RBW range: 1 Hz to 300 kHz
– Gate delay: -150 ms to 10 s
– Gate width: 6 μs to 1.8 s
– Gate sources: External, RF burst, Video
• Reflection measurements (RL, VSWR): 30 kHz to 9/14/18/26.5 GHz (model dependent)
• 25 MHz bandwidth IF output for wideband signal down-conversion
• Tracking generator / independent source option: 30 kHz to 26.5 GHz
• Pre-defined radio standards: W-CDMA, LTE, GSM with custom standard capability
Environmental Design
Dust-free construction without vents or fans enables operation in rugged field environments.
– Typical Applications
Satellite communications, microwave backhaul, military communications, radar systems testing, and field-based interference analysis.
