Narda Safety Test Solutions Selective Radiation Meter SRM-3006 with LTE option

Regulations not only require measurement of the instantaneous field exposure at an antenna site, but also demand separate recording of the proportions due to the individual antennas and extrapolation to determine the exposure at maximum traffic load. Narda Safety Test Solutions has equipped its Selective Radiation Meter SRM-3006 frequency selective field measuring instrument with an LTE option (which can be retrofitted to older instruments), thus meeting these requirements.

The instrument measures the electromagnetic fields emanating from LTE wireless communications stations in their entirety as well as according to cells and their antennas automatically. It can also extrapolate the results to determine the immission that would occur when transmission capacity is fully utilised.

The meter obtains the LTE-specific information by demodulating control and information channels that are part of the LTE signal. It automatically extracts the cell ID from the primary and secondary sync signals (PSS, SSS) and determines the transmitting antennas from the reference signal. All the levels of these signals can be shown in detail at the same time. Settable extrapolation factors allow calculation of the field exposure at maximum transmission load.

As a spectrum analyser, the product can cover all LTE bandwidths from 1.4 to 20 MHz or select individual frequency channels down to 15 kHz. The instrument displays the continuous time characteristic of the signal level in scope mode, so that the levels of the PSS and SSS can be identified even though they are present only in a few timeslots. The product automatically records peak values in level meter mode.

The instrument can automatically evaluate the field exposure in accordance with current human safety standards. Its analysis features make it suitable for monitoring limit values, checking signal integrity and detecting impairments. It can be used for applications ranging from safety investigations in the near field of longwave transmitters, through to measurements on radio and TV transmitters, and exposure measurements on the latest generation of wireless communications services.