The R&S FSH4 and R&S FSH8 handheld analyzers from Rohde & Schwarz have been updated to provide more detailed measurements in LTE networks.
With these handheld spectrum analyzers, users can now perform modulation analysis in the LTE frequency division duplex (FDD) and time division duplex (TDD) modes. The new options provide a more detailed view of LTE signals than is possible with other manufacturers' instruments.
They can analyze the complete LTE frame with up to 10 subframes as called for by the standard and also support extended cyclic prefix as defined in the standard. The extended cyclic code prefix reduces interference due to delay spread in large radio cells. In addition, the analyzer can be used to test parallel multi-antenna signal transmissions up to 4×4 MIMO.
The standard models of the R&S FSH4 and R&S FSH8 handheld analyzers offer a demodulation bandwidth of 20 MHz, which covers all the signals defined in the LTE standard.
The R&S FSH-K50 and R&S FSH-K51 options allow modulation analysis on LTE FDD and LTE TDD base stations respectively. Both options support all key LTE measurements – from single input single output (SISO) to 4×4 multiple input multiple output (MIMO) transmissions.
Equipped with the new LTE analysis options, the R&S FSH4 and R&S FSH8 provide a more detailed view of LTE signals and support both normal cyclic prefix and extended cyclic prefix. The LTE standard specifies that each symbol within an LTE frame be preceded by a cyclic prefix to prevent overlapping of symbols and reduce intersymbol interference. The normal cyclic prefix is designed for a distance of around 1.5 kilometers.
For larger radio cells, the LTE standard specifies frames with fewer single pulses and longer prefix (extended cyclic prefix).
The handheld analyzers display the power and modulation quality (EVM) of the data signal (PDSCH) and of other signal components. For the data signal, these parameters are broken down by modulation type. This level of detail allows users to better localize errors.
The standard models offer several spectrum analysis functions for LTE, including the measurement of channel power and the identification of spurious emissions that could interfere with adjacent transmit signals.
More information about the R&S FSH4 and R&S FSH8 is available at www.rohde-schwarz.com/product/FSH4/8.