The MS2601A/J Spectrum Analyzer has a wide bandwidth from 9 kHz to 2.2 GHz which includes the video band. The RF input impedance is 50 Ω for the MS2601A and 75 Ω for the MS2601J. A synthesized system is used for the local signal. Also, since an automatic calibration function is built in, measurement error is reduced to 1/3 of conventional Anritsu spectrum analyzers and very accurate measurements are possible. The MS2601A/J operability is furthered by use of a zone marker, a zone marker sweep, a frequency axis scroll, a unique new counting method, and a PMC (Plug-in Memory Card) which simplifies the measurement. Moreover, since PTA (Personal Test Automation) can be built in, a high-speed automatic measuring system can be configured easily. Therefore, the MS2601A/J is very suited to productions line for various components and electronic devices. The MS2601A/J has also a quasi peak (QP) detector to measure the EMI from data processing equipment. ■ Applications The MS2601A/J can be used for development, adjustment, inspection, and maintenance of electronic components and devices in: AM, FM mobile radio equipment MCA, personal radio equipment Satellite broadcasting, TV equipment (tuners, converters, etc.) Data processing equipment such as personal computers for EMI (Electro-Magnetic Interference) measurement