Mobile Wireless Learning Center

Industry Leading Technical Content


Application Notes:

dB or not dB?

Everything you ever wanted to know about decibels but were afraid to ask… True or false: 30 dBm + 30 dBm = 60 dBm? Why does 1% work out to be -40 dB one time but then 0.1 dB or 0.05 dB the next time? These questions sometimes leave even experienced engineers scratching their heads.… Read more »
Application Notes:

Interference hunting in TDD networks

In time division duplex (TDD) networks, the downlink (DL) and uplink (UL) use the same frequency band in different timeslots. When viewing such TDD signals on a conventional spectrum display, it is impossible to differentiate the two as well as any other unwanted signals present in the same spectrum. This makes interference hunting extremely difficult.… Read more »
Application Notes:

NB-IoT: The Need for Scanner Based Testing

NB-IoT, (Narrow Band Internet of Things), also known as Cat NB1, is a standard for connecting “things” to the internet through the cellular network. This is a standard focused on machine to machine communications. The range of applications are vast, with key applications including asset tracking, intrusion detection, utility meter reporting, smart parking areas, and… Read more »
Application Notes:

Testing LTE-Advanced (Rel.10)

This application note summarizes the Rohde & Schwarz test solutions for LTE-Advanced (Release 10) using Vector Signal Generators, Signal and Spectrum Analyzers and the Wideband Radio Communication Tester.
Application Notes:

LTE and Bluetooth® in-device coexistence with WLAN

This application note employs preliminary theoretical analysis and demonstrates how the problems of in-device coexistence can be measured. Exemplary, the effects of LTE and Bluetooth® traffic on the WLAN performance of a commercially available smartphone are examined. These examples will also enable the reader to design tests for complementary scenarios.
Application Notes:

Narrowband Internet of Things Measurements

The Internet of Things (IoT) is considered the driving force of current and future wireless communications. In release 13, 3GPP has specified Narrowband-IoT (NB-IoT) as a new physical layer. This application note gives a short introduction to NB-IoT and shows the easy measurements with Rohde & Schwarz instruments.
Application Notes:

Higher Order MIMO Testing with the R&S®SMW200A Vector Signal Generator

Due to its outstanding performance the R&S®SMW200A vector signal generator is ideal for testing MIMO receivers in a vast variety of applications offering maximum usability at minimum form factor. It can generate up to eight antenna signals simultaneously in its digital baseband – all standard-compliant and with antenna-specific coding. In addition, it can simulate the… Read more »
Application Notes:

LTE-A Base Station Transmitter Tests

3GPP TS36.141 defines conformance tests for EUTRA base stations (eNodeB). Release 13 (LTEAdvanced Pro) added several tests, especially for Narrowband Internet of Things (NB-IoT). This application note describes how all required transmitter (Tx) tests (TS36.141 Chapter 6) can be performed quickly and easily by using signal and spectrum analyzers from Rohde & Schwarz. A few… Read more »
Application Notes:

LTE-A Base Station Performance Tests

3GPP TS36.141 defines conformance tests for EUTRA base stations (eNodeB). Release 12 (LTEAdvanced) added several tests, such as those for PUCCH format 2 and PUSCH with TTI bundling and enhanced HARQ pattern. This application note describes how all required performance tests (TS36.141 Chapter 8) can be performed quickly and easily by using vector signal generators… Read more »