The Advantest R3365 Spectrum analyzer have a large sized CRT screen in a portable unit and a wide frequency range, allowing measurements from 100 Hz to 8 GHz in a single sweep.The R3365 also provides excellent spectral purity of -110 dBc/Hz at 2.6 GHz (10 kHz offset frequency) due to newly developed high purity synthesizer.The R3365 spectrum analyzer performs especially well in measuring the spurious emission intensity of new mobile communications equipment, the bandwidth of occupied frequencies and signal leakage from adjacent channels. In the low noise mode, the series has a high-input sensitivity of -145 dBm (1 MHz to 3.6 GHz), so it can easily measure low level signals.