Anritsu MS2840A – Spectrum Analyzer/Signal Analyzer

The Anritsu MS2840A is a spectrum analyzer and signal analyzer built for precise RF and microwave measurements across R&D, manufacturing, and field-test environments. Four models cover 9 kHz to 3.6 GHz, 6 GHz, 26.5 GHz, and 44.5 GHz respectively, with external mixer support for extended range. The instrument delivers close-in phase noise - reaching –140 dBc/Hz at 150 MHz and 10 kHz offset - and excellent dynamic range with displayed average noise levels better than –160 dBm/Hz (30 MHz to 6 GHz with preamplifier). Amplitude measurement spans +30 dBm to –166 dBm with ±0.35 dB error to 4 GHz.

Technical Specifications

Frequency Range: 9 kHz to 3.6 GHz (MS2840A-040), 6 GHz (MS2840A-041), 26.5 GHz (MS2840A-044), 44.5 GHz (MS2840A-046); expandable with external mixers

Amplitude Range: +30 dBm to –166 dBm

Amplitude Error: ±0.35 dB (up to 4 GHz)

Resolution Bandwidth: 1 Hz to 10 MHz

Analysis Bandwidth: Standard 31.25 MHz; optional 62.5 MHz or 125 MHz maximum

DANL (Preamp ON): Better than –160 dBm/Hz (30 MHz to 6 GHz)

Third Order Intercept (TOI): +15 dBm nominal

Phase Noise Performance: - –140 dBc/Hz @ 150 MHz center frequency, 10 kHz offset (MS2840A-040/041) - –138 dBc/Hz @ 1 GHz, 10 kHz offset (measured, 3.6/6 GHz models) - –112 dBc/Hz @ 20 GHz, 10 kHz offset (measured) - –108 dBc/Hz @ 40 GHz, 10 kHz offset (measured)

Key Features

Built-in 31.25 MHz FFT for multi-domain analysis and transient capture

Signal analysis functions: power vs. time, frequency vs. time, phase vs. time, CCDF/APD, spectrogram

MS2840A-066 Low Phase Noise Performance option enhances SSB phase noise for RF inputs 130 MHz to 3.7 GHz, 1 kHz to 1 MHz offsets

Optional real-time signal analysis and vector modulation analysis

Preamplifier option for improved sensitivity

Typical Applications

Microwave component production and characterization

Wireless backbone network testing

Mobile radio communication systems validation

Narrowband RF signal measurement and analysis