Application SV28 enables the following LTE base station transmitter

measurements:

Cell ID

Channel Power

Occupied Bandwidth

Adjacent Channel Leakage Ratio (ACLR)

Spectrum Emission Mask (SEM)

Transmitter Off Power for TDD

Reference Signal (RS) Power

There are four presets to accelerate pre-compliance testing and determine

the Cell ID. These presets are defined as Cell ID, ACLR, SEM, Channel

Power and TDD Toff Power. The measurements follow the definition in

3GPP TS Version 12.5 and support all base station categories, including

picocells and femtocells. Pass/Fail information is reported and all channel

bandwidths are supported.

The Cell ID preset displays the Primary Synchronization Signal (PSS) and

the Secondary Synchronization Signal (SSS) in a Constellation diagram. It

also provides Frequency Error.

The ACLR preset measures the E-UTRA and the UTRA adjacent channels,

with different chip rates for UTRA. ACLR also supports Noise Correction

based on the noise measured when there is no input. Both ACLR and SEM

will operate in swept mode (default) or in faster single acquisition (real-time)

when the measurement bandwidth required is less than 40 MHz.

The signal classification application (SV54) enables expert systems

guidance to aid the user in classifying signals. It provides graphical tools

that allow you to quickly create a spectral region of interest, enabling you to

classify and sort signals efficiently. The spectral profile mask, when overlaid

on top of a trace, provides signal shape guidance, while frequency,

bandwidth, channel number, and location are displayed allowing for quick

checks. WLAN, GSM, W-CDMA, CDMA, Bluetooth standard and enhanced

data rate, LTE FDD and TDD, and ATSC signals can be quickly and simply

classified. Databases can be imported from your H500/RSA2500 signal

database library for easy transition to the new software base.

Above is a typical signal survey. This survey is of a portion of the TV broadcast band,

and 7 regions have been declared as either Permitted, Unknown, or Unauthorized, as

indicated by the color bars for each region.

In this illustration, a single region has been selected. Since we have declared this to be

an ATSC video signal, the spectrum mask for the ATSC signal is shown overlaid in the

region. The signal is a close match to the spectrum mask, including the vestigial carrier

at the lower side of the signal, characteristic of ATSC broadcasts.

RSA306B USB Spectrum Analyzer

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