HF Site Background Noise Monitoring System

HF Site Background Noise Monitoring System

The Site Background Noise Monitoring System (SBNMS) is an assembly of equipment to obtain noise and spectrum occupancy data from 5 to 35 MHz.

The data is processed to allow the determination of spectrum occupancy statistics and atmospheric noise levels.

The SBNMS has a calibrated internal noise source that is used to calibrate the receiver system. Duration between calibrations can be determined by the application or user’s requirements.

The SBNMS uses BAE Systems Australia’s Advanced Direct Digital Receiver (DDRx) as its backbone, which provides exceptional wideband performance and ease of use.

The SBNMS is controlled with a commercial PC via gigabit ethernet.

– Analyse external HF background noise

– Analyse external HF spectrum occupancy

– Self-calibration – Remote deployable – Back-to-base communication – Flexible power supply options – Easy to use.

Measure site background noise for site selection and performance monitoring

This document gives only a general description of the product(s) or service(s) except where expressly provided otherwise shall not form part of any contract. From time to time, changes may be made in the products or the conditions of supply. © BAE Systems 2016 all rights reserved. Permission to reproduce any part of this document should be sought from BAE Systems. Permission will usually be given provided that the source is acknowledged and the copyright notice and this notice are reproduced.

For more information contact:BAE Systems Australia

T: +61 (0)8 8480 8888E: [email protected]: www.baesystems.com

The system has been designed for online, real-time processing. Accurate data time recording is provided by connection to a GPS.

User-controlled parameters include: – Run start times – Sweep start and stop frequencies – 1 to 100 runs per hour (noise, occupancy and

calibration combined) – Processing steps (data windowing functions).

The SBNMS can be equipped with a number of back-to-base communication facilities for transmitting stored processed data as well as status to and receiving control commands from the user’s base station.

As a result, the SBNMS can be controlled locally at the installation site or remotely at the user’s base station, using an internet connection.

The SBNMS can be deployed in a remote location in a non-controlled environment, using solar/battery power if necessary. User power infrastructure can also be used.

Specifications Frequency range 5 to 35 MHz

Receiver noise figure <10 dB

Antenna Monopole

Receiver Advanced Direct Digital Receiver (DDRx)

Data acquisition Max. 100 scans per hour

HF spectrum occupancy Measured to +/- 1 dBW

HF background noise Quietest 2 kHz in100 kHz RFI effects removed

Dynamic range 115 dB

Frequency resolution >=100 Hz (user defined)

Back-to-base options Internet/intranet, satellite up/down link, wireless modem/mobile telephony

Power options 85 to 264 VAC 24 Vdc (battery) solar cells

Power consumption <25 W – Excludes computer and back-to-base communications equipment