Analyzer detects interference in the wireless spectrum

-November 06, 2017


As wireless communications systems crowd the RF spectrum, interference becomes an increasing problem. The addition of new frequencies for wireless carriers, the reshuffling of U.S. TV broadcast stations, and the deployment of many new devices creates the interference of things. Thus, wireless carriers need to characterize interference, especially in densely populated areas. Such interference can degrade a users' quality of experience and quality of service.

Rohde & Schwarx MNT100

The MNT100 from Rohde uses real-time Fast-Fourier Transforms (FFTs) at frequencies from 600 MHz to 6 GHz. FFTs make it possible to detect intermittent signals as short as 20 ns, which might be missed with swept-frequency spectrum analyzers. Its polychrome display lets you see these intermittent signals as overlays on top of more continuous signals.

Rohde & Schwarx MNT100 screen

Competing with products from Anritsu, Keysight, and Tektronix, the MNT100 can scan at up to 1.6 GHz/sec. Using a PC-based software option, an antenna (optional, see photo) and a Windows-based software, you can see from where signals emanate. The R&S MNT100 has several RF interference locator packages.

  • A standard locator package for manual handheld interference hunting.
  • An automatic locator package that lets you automate mobile direction finding.
  • A complete locator package comprising basic and automatic locator equipment.

The MNT100 can demodulate AM, FM, pulse modulation, phase modulation, upper and lower sidebands, CW, and independent sideband (ISB). Its 106 dB spurious-free dynamic range means the MNT100 can detect many low-level signals. Its tuned bandpass filter (600 MHz to 1.5 GHz) and low-pass, high-pass, and band-pass filters (1.5 GHz to 6 GHz) let the MNT100 suppress strong out-of-band signals so you can detect lower-level interfering signals.

Rohde & Schwarz, MNT100 Product page.

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