Advantest R3271 Spectrum Analyzer

Advantest R3271  Spectrum Analyzer

Spectrum Analyzers

The R3271A/3371A spectrum analyzers are designed to analyze pulse RF signals used for radar or to analyze the spectrums of microwaves and quasi-millimetric waves used for satellite broadcasting, satellite communications or mobile communication. These spectrum analyzers can measure the ultra-broad bandwidth of 100 Hz to 26.5 GHz in one sweep operation. They can also perform the continuous sweeps and repeatedly. A newly developed high-purity synthesizer enables a high signal purity of –110 dBc/Hz (10 kHz offset frequency) in a frequency band of 2.5 GHz. The R3271A Series is thus ideally suited for mobile radio communications, for which narrower bandwidths and digitalization are being advanced. The series features a BASIC controller which allows measured data or set conditions to be stored and free construction of automatic measurement systems without the need for external controllers. The R3371A has a built–in tracking generator and is suitable for frequency measuring when setting up or maintaining digital radio base stations.

■ Excellent Spectrum Purity: –110 dBc/Hz (10 kHz offset from Carrier) 

■ Resolution Bandwidth of 10 Hz to 3 MHz 

■ Continuous Sweeps for All Bandwidths 

■ BASIC Controller Function 

■ Digital Radio Evaluation Measurement 

■ Internal Tracking Generator (R3371A)

■ 8–Point Max. Multimarker and List Functions As well as having a ∆ marker and peak marker, the R3271A Series can display multimarkers for up to 8 points. A list of these multimarkers can also be displayed. By using a definition function, this multimarker list not only improves operability, but also greatly improves measurement speed.

■ Highest Spectrum Purity In a frequency band lower than 2.6 GHz, a high signal purity of –110 dBc/Hz (10 kHz offset frequency) can be attained by means of a newly developed high-purity synthesizer. This enables measurement of nearby spurious emissions over a wide dynamic range. At offset frequencies of 23 GHz and 10 kHz, a signal purity of –110 dBc/Hz can also be obtained.

■ Occupied Bandwidth and Adjacent Channel Leakage Power Measurement By performing calculations on the measured spectrum data, the R3271A Series can easily measure occupied bandwidth and adjacent channel leakage power, the characteristics of radio transmitter signals. When measuring occupied bandwidth, carrier frequencies are also displayed. When measuring adjacent channel leakage power, a dynamic range of 70 dB (typical value) can be obtained due to the excellent signal purity. The R3271A Series can also make measurements of adjacent channel leakage power using a root Nyquist filter. This filter conforms with PDC and NADC standards. The symbol rate which decides the filter form and the roll factor which can be set arbitrarily enable measurements other than PDC and NADC.

■ Total Power Measurement With the spread spectrum system used in radio LANs and other applications, the spectrum occupies a wide waveband area and the signal power measurement function of conventional spectrum analyzers has been inadequate. The R3271A Series does RBW calibration (power compensating of resolution bandwidth) to achieve more accurate total power measurement.

■ Average Power Measurement (AVG POWER) Signal power and leakage power during carrier off time in digital mobile communications are measured with average power measurement. Conventional signal power measurements were generally done using power meters. However, digital mobile communications use the TDMA (Time Division Multiple Access) system, so measurements of average power in burst signals or during carrier off time are difficult using a power meter. In these cases, average power measurement using a spectrum analyzer is an effective measuring method. The average power measurement function of the R3271A Series uses a measuring window, allowing measurement only within a specified range and measurement of average power density.

■ Power Sweep Function Ideal For Measuring Amplifier Linearity and Saturation Point The R3371A Series has a Power Sweep Function which sweeps the output level. This function has been made possible through a newly developed attenuator in the tracking generator output section which uses a semiconductor switch. The level sweep with a 30 dB/0.1 dB step sweep range provides high precision measurements of amplifier input/output characteristics.