Rohde&Schwarz ESMB User Guide

Monitoring Receiver R&S®ESMB

Data sheet

Version

03.00

September

2003

Military and civil monitoring from 9 kHz to 3 GHz

ITU-compliant measurements

The Monitoring Receiver R&S ESMB is
ideally suited for military monitoring tasks
and spectrum monitoring in line with ITU
recommendations as well as for use in
radio investigation services.

The range of applications includes:

◆ Signal detection

◆ Signal search in frequency and

memory scan mode

◆ Spectrum occupancy measurement

◆ RF and IF analysis

◆ Coverage measurements (option)

◆ Field-strength measurements

General

The R&S ESMB is a monitoring and test
receiver for all radio detection and
radiomonitoring

tasks in line with ITU-R,
and for radio investigation services. The
compact and sturdy design combined
with low weight makes the R&S ESMB a
versatile and universal unit for stationary
and mobile use.

Applications

The following measurements in line with
ITU-R specifications can be performed by
the R&S ESMB:

◆ Frequency and frequency offset to

ITU-R SM 377

◆ Field strength to ITU-R SM 378

◆ Modulation to ITU-R SM 328

◆ Spectrum occupancy and identifica-

tion with external PC to ITU-R SM 182

◆ Bandwidth to ITU-R SM 328

The optimized features of the R&S ESMB
allow fast performance of the following
additional tasks in military radiomonitor­ing and radio investigation services:

◆ Frequency scan with predefined

frequency ranges

◆ Memory scan of up to 1000 memory

channels

◆ RF frequency spectrum (option)

◆ Audio monitoring of CW, AM, SSB

and FM transmissions

◆ Identification

Description

As a ½ 19" unit, the R&S ESMB is ideal
both for mobile use and for rack­mounting. It contains the following
functional units:

◆ A/D and DSP module with digital IF

filters, digital demodulators for CW,
AM, LSB, USB, PULSE, FM, PM, IQ

and ISB, parameter measurements
and FFT processing of IF panoramic
display

◆ Band and tracking preselection

◆ RF frontends for converting the

antenna signal into an IF of 10.7 MHz

◆ Fast synthesizer

◆ Processor system

◆ Display and control unit

◆ Remote control interface

◆ DC/DC converter

Digital IF section

The R&S ESMB covers a frequency range
from 9 kHz to 3 GHz. A large number of IF
bandwidths is required to process the vari­ous signals with optimum signal-to-noise
ratio. Maximum quality in a minimum of
space can only be ensured by using ultra­modern digital signal processing through­out.

The R&S ESMB is equipped with 18 IF
filters from 150 Hz to 300 kHz, and up to
1 MHz in the IF panoramic mode.

2 Monitoring Receiver R&S

®

ESMB

Operation

The Monitoring Receiver R&S ESMB
features full remote control capability as
well as manual control via the front panel.

The operating concept meets all the
demands made on a state-of-the-art
spectrum monitoring receiver, i.e. all the
main functions such as type of modula­tion, bandwidth, etc can easily be set
directly via labelled keys.

Menu control is organized in priority
levels so that signal processing is not
interrupted by menu changes and the
user has an optimized view of current
operations.

In conjunction with the
Digital Direction Finder
R&S DDF190, the
Monitoring Receiver
R&S ESMB forms a
monitoring system with
excellent price/perfor­mance ratio

◆ Step width

◆ Signal threshold (dBµV)

◆ Dwell time

◆ Hold time

◆ Number of scans

◆ Signal-controlled continuation

◆ Suppression (individual frequencies

or search ranges)

Memory scan

The R&S ESMB uses 1000 definable
memory locations. A complete data set
such as frequency, mode of demodula­tion, bandw

idth, squelch level, etc can be
assigned to each memory location. The
content of any memory location can be
transferred to the receiver manually using
the RCL key.

Emissions detected can be seen at a
glance. Aural monitoring of the informa­tion is possible by simply pressing a soft­key. The R&S ESMB then goes to the DIGI
Scan listen mode. The stored spectrum is
displayed in the background, and the
emission of interest can be selected and
monitored by marking it with the
frequency cursor.

Location of miniature transmitters at
close range is possible in the differential
mode of the DIGI Scan option. In this
mode, the displayed spectrum is stored as
a reference. Current spectra are superim­posed on the reference spectrum, and
any new signals or variations in signal
strength are clearly discernible as peaks.
If the measurement is carried out while
walking across the room, the field
strength of transmitters at close range
varies to a greater extent than that of
transmitters located far away. This differen­tial display ensures fast and reliable loca­tion of miniature transmitters even in the
case of spread-spectrum transmission.

Optimized view for current task

Overview

IF panoramic display

Scan modes

Frequency scan

It is possible to define a frequency range
to which a complete data set can be allo­cated. In addition to receiver settings, the
following scan parameters are included in
the data set:

Frequency spectrum

Fitted with the frequency spectrum
option DIGI Scan, the R&S ESMB scans
the frequency range of interest with
digital control and displays the associ­ated spectrum.

DIGI Scan listen mode

DIGI Scan differential mode

Monitoring Receiver R&S® ESMB 3