Signal Guide

Service Description Selection UMTS

Here you will find information about the selected service, along with measurement examples.

UMTS Theory & Details
Communication
Typical Frequency Range:

1900 – 2025 MHz (of which 1980 – 2010 MHz is for satellite communications),
2110 – 2200 MHz (of which 2170 – 2200 MHz is for satellite communications)

General:

UMTS (Universal Mobile Telecommunications System) is a third generation mobile wireless mobile wireless system (following GSM as the second generation). It is standardized by ETSI and is maintained by the 3rd Generation Partnership Project (3GPP).

Modulation: W-CDMA, QPSK, QAM

W-CDMA (Wideband Code Division Multiple Access)
Modulation: QPSK (HSPA - 16-QAM or 64-QAM)

UMTS Measurement Examples
Spectrum
Overview of one UMTS band. The UMTS channels spaced at 5 MHz can be clearly seen.
Spectrogram
Shows a complete UMTS channel at 2.128 GHz as well as parts of the neighboring channels with very different field strengths.
HiRes Spectrogram Full
Overview measurement of the same frequency range as Spectrum over a time period of about 18 ms, without time gaps.
HiRes Spectrogram Zoom
Section from the HiRes Spectrogram Full. Because spreading is used over the entire UMTS channel bandwidth, no additional information can be obtained.
Persistence Spectrum
Light density display calculated on the basis of the same data as HiRes Spectrogram Full. Can detect irregularities in evenly distributed digital signals. The “rounded” edges of the channel spectrums compared with COFDM channels are typical.
Magnitude
Shows a continuous signal (CW).
Scope
Shows practically no information about UMTS transmission.