Anritsu MS2661C Portable Spectrum Analyzer

The Anritsu MS2661C is a portable spectrum analyzer engineered for RF signal analysis from 9 kHz to 3 GHz. It delivers stable, drift-free measurements across general-purpose RF testing, EMI characterization, CATV maintenance, cellular communications, and digital broadcasting applications. Weighing 11 kg in standard configuration, the instrument combines laboratory-grade performance with field portability.

Its bright full-color display remains legible in direct sunlight, while synthesized frequency generation ensures minimal drift during extended measurements.

Technical Specifications

Frequency coverage spans 9 kHz to 3 GHz with 1 Hz resolution via integrated frequency counter. Resolution bandwidth ranges from 1 kHz to 3 MHz standard, expandable to 30 Hz, 100 Hz, and 300 Hz with Option 02. Video bandwidth covers 1 Hz to 3 MHz with manual or automatic selection. Amplitude measurements range from DANL to +30 dBm, delivering over 80 dB dynamic range on a single screen. Phase noise performance reaches below –100 dBc/Hz at 10 kHz offset. Second harmonic distortion measures –75 dBc; two-signal third-order intermodulation distortion reaches –80 dBc. Frequency span accuracy is ±2.5% for spans ≥10 kHz and ±5% for narrower spans with Option 02. Noise level stabilizes within 30 minutes of power-on.

Key Features

• One-button evaluation of C/N, adjacent channel power, occupied frequency bandwidth, and burst average power


• 50 Ω standard input impedance; optional 75 Ω input available


• Optional 20 dB pre-amplifier (100 kHz to 3 GHz range)


• MIL-STD-28800 Class 3 rugged construction


• Memory card interface for trace data, parameter storage, and bitmap screen captures


• Remote control via included SpectRe software enabling near-real-time monitoring and data collection

Typical Applications Suitable for RF and EMI testing, CATV system maintenance, cellular base station characterization, and digital broadcasting signal verification in laboratory and field environments.

Compatibility & Integration Standard RS-232C and GPIB interfaces. Optional Centronics parallel interface (incompatible with GPIB) and PTA parallel I/O (incompatible with Centronics). Reference crystal oscillator available as Option 01 for enhanced accuracy. Dimensions: 320 (W) × 177 (H) × 351 (D) mm.