Additional Features: Frequency range: 9 kHz to 3 GHz Marker counter resolution: 1 Hz to 1 kHz Frequency span: zero, 50 kHz to 3 GHz Video bandwidth: 10 Hz to 1 MHz, 1-10 step Amplitude measurement range: +20 dBm to Average noise level Sweep time: 50 ms to 500 s Modes: REPEAT, SINGLE Calibration signal: 30 MHz, -20 dBm ± 0.3 dB Built-in high accuracy OBW, ACP, and Power measurement functions which can be applied to digital radio measurement Frequency stabilization Improved SPAN accuracy Improved level accuracy Improved ease of use through Auto TUNE function Total level accuracy guaranteed by Auto CAL function Standard interfaces: GPIB, RS232C, Centronics, and FD drive Large character display allows results to be seen Substantial EMC measurement function Improved system operation speed Operation key arrangement for ease of use Compact and light weight with a space-saving design High performance realized within an economical platform The Advantest R3131 Spectrum Analyzer meets the frequency needs of both PCS and cellular wireless standards. The synthesized architecture and specifications such as phase noise lower than -100 dBc/Hz @ 20 kHz offset, ensure measurement accuracy and repeatability across the instrument's entire range. This level of accuracy, plus one-button automated measurements for adjacent channel power, occupied bandwidth, and average and total power, make the Advantest R3131 well-suited to wireless design and troubleshooting needs. Supplementing these quantitative measurements, the R3131 also provides automatic pass/fail limit testing, a valued feature for manufacturing applications.