Advantest U3751 Portable Spectrum Analyzer

Advantest U3751 Portable Spectrum Analyzer

Product Information

The U3741/3751 portable spectrum analyzer supports a great range of applications, from use on production lines to system installation and maintenance. Its digital IF enables dramatic improvements in power measurement accuracy for digitally modulated signals. Moreover, the U3741/3751 provides twice the throughput of its predecessor. A light and compact 3 GHz/8 GHz spectrum analyzer, the U3741/3751 provides basic performance reliably and at a low cost.

•Better measuring speed due to high-speed processing (twice as fast as its predecessor) 

•Dramatically improved power measurement accuracy for digitally modulated signals 

•Built-in 3 GHz/8 GHz pre-amp standard •Average display noise level: -155 dBm/Hz@1 GHz, pre-amp ON 

•Tracking generator covering a frequency range of 100 kHz to 3 GHz/6 GHz 

•Lightweight and compact design, with a maximum weight of only 5.6 kg 

•Continuous operation of up to 2.5 hours with the battery pack

5-minute warm-up time

With the U3741/3751, warm-up time has been reduced to a scant 5 minutes (at an ambient temperature of 20 to 30°C). This shortened period virtually eliminates pre-warming time as a consideration, and permits quick and accurate measurement.

High throughput

This spectrum analyzer delivers data transfer speed superior to that of its predecessor. While the previous model delivered 875 ms, the U3741/3751 boasts a speed of 350 ms: double the system throughput *2 (using the GPIB interface)*3. This faster speed contributes to a significant reductions to cost of test on production lines and in similar applications.

Improvements in overall accuracy

Digitized IF sections and innovative circuit technology dramatically improve absolute power measurement accuracy. ±0.8 dB (10 MHz to 3 GHz: U3741/3751) ±1.0 dB (3 to 8 GHz: U3751)

Up to 2.5 hours *1 of nonstop battery-driven operation

The spectrum analyzer uses one of three power systems: AC (100 V/200 V), DC (+11 V to +17 V), or the battery pack. This flexibility enables measurement in a variety of applications, whether in the factory or in the field.

RMS Average, essential for power measurement

Power tends to be spread over a wide frequency range, and the peak factor tends to be higher in digital modulation, with it’s expanded communication capacity. The U3741/3751 allows precise power measurements by determining the effective values (RMS values) from instantaneous power values obtained in high-speed sampling and translating them into a power spectrum. This method also enables measurement reproducibility of 0.01 dB in power measurement of digitally modulated signals.

Pre-Amp covering the 3 GHz/8 GHz bandwidth

The U3741/3751 contains as standard a pre-amp that covers all frequency bands. In the analysis of faint signals, its input sensitivity can be equivalent to that of high-end models. Also, it effectively compensates for the loss from the antenna when measuring radio signals in an outdoor environment.

Built-in frequency counter with 1-Hz resolution

Frequency can be accurately measured by simply positioning the cursor on the target spectrum selected from multiple spectral lines. The U3741/3751 is indispensable for measuring the carrier wave frequency in a general multi-carrier system.

Zoom function

The measuring window and F-F mode can facilitate analysis of a specific signal in broadband measurement. Also, RBW can be changed independently, enabling high-speed measurement of the target signal in both broadband and narrowband. A variety of other signal analysis functions are also available, including those in F-T mode or T-T mode.