Atec FSEM20 User Manual

Spectrum and Network Analysis 152

Contents Overview R&S Addresses

Chapter Overview

Spectrum Analyzers FSEA, FSEB, FSEM, FSEK

20 Hz to 40 GHz

High-performance analyzers
for digital mobile radio and
universal applications

FSEK30 (photo 42756)

Brief description

FSEA, FSEB, FSEM and FSEK are
advanced, high-speed and high-per­formance analyzers tailored to the
requirements of modern digital com­munication systems. They can also be
used as general-purpose analyzers for
many applications. High measure­ment speed, modular design and
excellent technical features make for
an excellent price/performance ratio.

In addition to measurement functions
for digital communication systems,
such as 2 µs sweep time in ZERO
SPAN mode, pretrigger and trigger
delay, gated sweep and adjacent­channel power measurement, these
spectrum analyzers feature a wide
dynamic range, a very low measure­ment uncertainty of 1 dB and a low­noise synthesizer.

FSE analyzers have low inherent noise
and a wide dynamic range, so that for
instance measurement of GSM power
ramps is no problem.

An extremely wide intermodulation­free dynamic range of 110 dB (with
10 Hz resolution bandwidth) ensures
reliable measurements on highly lin­ear amplifiers as well as correct anal­ysis of broadband complex signals.

From the available frequency ranges,
the basic models 20 and the high-per­formance models 30 the right instru­ment can be chosen for every applica­tion. Models 20 can easily be
upgraded to give the full range of func­tions of models 30.

To ensure correct measurement of time
variants or pulse-modulated signals,
the FSE features digital resolution fil­ters (10 Hz to 1 kHz) with a response
corresponding to that of analog filters.
It additionally provides FFT band­widths down to 1 Hz (models 30).

Main features

• Resolution bandwidths 1 Hz (up to
10 MHz), adjustable in steps of

1/2/3/5/10

• Displayed noise floor down to

−160 dBm (FSEA)

Type Index

• 3rd-order intercept point >+15 dBm

• 1 dB compression point of RF input

>+10 dBm

• Phase noise at 20 kHz from carrier:

down to −123 dBc (FSEA)

• Intermodulation-free dynamic range
110 dB

• Measurement uncertainty up to
1GHz: 1dB

• Headphones connector and built-in
loudspeaker for AM/FM

• Internal RF trigger for GATED
SWEEP measurements

• Speed records:
– Shortest FULL SPAN sweep time

is 5 ms (for 3.5 and 7 GHz span)
with a fully synchronized sweep
– added speed is not at the
expense of frequency accuracy
but even enhances it

– Shortest ZERO SPAN sweep time

is 1 µs (100 ns/div) – ideal for
high-resolution measurements on
pulse edges

– More than 20 sweeps/s – an

optimal prerequisite for fast
alignments or applications in pro­duction

Contents Overview R&S Addresses

Chapter Overview

Type Index

Spectrum and Network Analysis 153

12

Contents Overview R&S Addresses

Chapter Overview

Spectrum Analyzers FSEA, FSEB, FSEM, FSEK

From AF to microwave

FSEM/K21/31 (corresponding to
FSEM/K20/30 with option FSE-B21)
allow frequency range extension by
means of external mixers. Continuous
automatic signal identification, which
is used to suppress unwanted image
frequency bands and mixture prod­ucts, ensures fast and easy measure­ments. Due to the built-in diplexer,
three-port as well as two-port mixers
can be used.

The external mixer measurement func­tion features great ease of operation:

• Definition of frequency range and
harmonics by selection of a
waveguide band

• Definition of all important parame­ters for each waveguide band
separately

• Frequency-dependent consideration
of mixer conversion loss

• Storage of parameters on hard disk

Measurement functions

• Up to 8 markers

• Marker functions for the direct
measurement of
– phase noise and

phase power density

– NEXT MIN/PEAK, NEXT MIN/

PEAK RIGHT, NEXT MIN/PEAK
LEFT

• Frequency counter with selectable
resolution

• LOW NOISE, NORMAL and LOW
DISTORTION modes to cater for
low-intermodulation and low-noise
operation

• Plotting or printout in background
operation or file saving in standard
graphic format

• Simultaneous display of four traces

• Selectable colour setup

• Numerous level and frequency lines

• Split-screen display with independ­ent windows

• Quasi-analog display

• Frequency zoom

Type Index

•Limit lines

• User-configurable menu and key­board macros

• Adjacent-channel power measure­ment for up to 7 channels

•RMS detector

Operation

A combination of hardkeys and
softkeys makes for extremely fast and
easy operation. The operating conven­ience based on a wide variety of eval­uation routines and marker functions
can be accessed via the menus. Com­plicated tree structures could be
avoided by using menus of lateral
structure and fixed control keys. Com­plete setups and traces, limit lines as
well as macros can be stored on the
hard disk or on floppy disks.

Overview of configurations and options

The analyzers of the FSE family are of modular design throughout. In the table below the right solution tailored to the needs

1)

of the various applications can be found. Except for the Colour Display FSE-B1 all options can easily be retrofitted (
be retrofitted, factory-fitted only).

Note: max. two of the options -B4, -B7 can be fitted in FSEM20

Designation, characteristics (hardware) Type Order No.

FSEA 20

FSEA 30

FSEB 20

FSEB 30

FSEM 20

FSEM 21

FSEM 30
Colour Display FSE-B11)1073.4990.02
7 GHz Frequency Extension FSE-B2 1073.5040.02
TV Demodulator Frame frequency and line trigger, trigger

delay and gap sweep allow convenient selection and analysis
of individual lines

Contents Overview R&S Addresses

Chapter Overview

FSE-B31)1073.5244.02

Type Index

m l m l m m l l m m l l

m m l l

m m m m m m m m m m m m

− − − − − − − −

Cannot

FSEM 31

FSEK 20

FSEK 21

FSEK 30

FSEK 31