Advantest R3261A is a compact, lightweight Spectrum Analyzer covering the frequency range of 9 kHz to 2.6 GHz.

It features a dynamic range of -120 dBm to +25 dBm, resolution bandwidths from 30 Hz to 1 MHz, 1 dB level accuracy (typically), synthesized frequency accuracy, and automated, internal software calibration correction.

The 3261A also offers high performance functions such as a central frequency with a 1 Hz resolution, start/stop frequency setting and an internal frequency counter with a 1 Hz resolution.

Trace store modes and marker measurement modes simplify test measurements. A memory card reader is standard for storing setups, traces, and measurements. An internal demodulator provides sound to a front panel phone jack.