Vector Signal Generator ¸SMU200A
Product brochure
Version
Version
02.02
01.00
July
November
2006
2004
The art of signal generation
Highlights of a new generation
The Vector Signal Generator
¸SMU200A has been designed to
meet all requirements encountered in research and development of modern communications systems as well as in their
production. The ¸SMU200A not only
combines up to two independent signal
generators in one cabinet of only four
height units – it also offers unrivaled RF
and baseband characteristics.
Due to its modular design, the
¸SMU200A can be optimally adapted to the requirements of different applications. The first RF path can be
equipped with one of the four available
frequency options. The upper frequency limit of 2.2 GHz/3 GHz/4 GHz or 6 GHz
is user-selectable. In addition, a second
RF path can be installed with upper frequency limits of 2.2 GHz and 3 GHz. The
lower frequency limit of all frequency
options is 100 kHz.
Up to two generators can also be in
stalled in the baseband section. They
generate complex signals in realtime and
are equipped with an arbitrary waveform
generator with 64 Msample memory for
I and Q (256 Mbyte). The signals generated in the different basebands can be
added. Frequency offset of the individual
signals is possible.
The modern, intuitive concept of the
¸SMU200A ensures fast and easy
operation.
-
2 Vector Signal Genera tor ¸SMU200A
2 Vector Signal Generator ¸SMU200A
Two signal generators in one
Frequency options from 100 kHz to
◆
2.2 GHz/3 GHz/4 GHz/6 GHz for the
first RF path
Optional second RF path up to
◆
2.2 GHz or 3 GHz
Up to two complete baseband paths
◆
Lossless combination of baseband
◆
signals in the digital domain (e.g. for
testing multistandard base stations)
Outstanding signal quality
I/Q modulator with 200 MHz RF band-
◆
width
Very low SSB phase noise of typ.
◆
–135 dBc (f = 1 GHz, 20 kHz carrier
offset, 1 Hz measurement bandwidth)
Wideband noise of typ. –153 dBc
◆
(CW, f = 1 GHz, >5 MHz carrier offset, 1 Hz measurement bandwidth)
Excellent ACLR of typically +70 dB for
◆
3GPP FDD (test model 1, 64 DPCHs)
Very high level repeatability of
◆
0.05 dB
High output power up to +19 dBm
◆
(PEP), overrange +26 dBm
High-stability reference oscillator as
◆
standard
Unrivaled flexibility
Four code channels in realtime for
◆
3GPP FDD
Change of modulation from slot to
◆
slot for GSM/EDGE
Baseband generator with universal
◆
coder for realtime signal generation
Arbitrary waveform generator with
◆
64 Msamples for I and Q (256 Mbyte)
Arbitrary waveform generator sup-
◆
ported by Simulation Software
¸WinIQSIM™
Optional fading simulator with up to
◆
40 fading paths
Intuitive operation
Color display with 800 × 600 pixels
◆
(SVGA format)
Intuitive user interface with graphical
◆
display of signal flow (block diagram)
Graphical display of baseband signals
◆
through built-in transient recorder
Context-sensitive help system
◆
Ideal for production
Very short frequency setting times
◆
(<3 ms); only 450 µs in List mode
Electronic attenuator up to 6 GHz
◆
Minimum space required as two com-
◆
plete generators are accommodated in one cabinet of only four height
units
Connectivity
Can be remote-controlled via GPIB
◆
and LAN
USB connectors for keyboard, mouse
◆
and memory stick
User-selectable trigger and marker
◆
signals
Vector Signal Genera tor ¸SMU200A 3
Intuitive operation
Turn
Click
The ¸SMU200A is equipped with a
modern and intuitive user interface. The
signal flow from the baseband to the RF
output is clearly shown in the block diagram. Each block represents a functional unit of the instrument. The generated
signal can be seen at a glance, including
whether it is affected by additive white
Gaussian noise or other impairments.
The rotary knob plays a central role in
¸SMU200A operation. It allows
the instrument to be operated with one
hand. Any task – whether navigating in
the block diagram or menus, selecting of
parameters or toggling between states
– can be performed simply by turning or
pressing the rotary knob.
Active windows are indicated by a labeled button in the Winbar at the bottom of the screen. With the softkey below, the respective window can be
quickly brought to the foreground. This
allows rapid navigation between different windows. It is possible, for instance,
to simultaneously display two slots of
a GSM/EDGE system and to toggle between them. Windows can of course also be automatically arranged (REARR),
hidden (HIDE) or closed (CLOSE) by
means of hardkeys.
Block diagram of the ¸SMU200A
Tool tip for permissible frequency setting range
4 Vector Signal Genera tor ¸SMU200A
Rotary knob for navigation in the menus
Softkeys and hardkeys of the
¸SMU200A for windows
management
The baseband signal can be monitored
in the graphics block. For instance, the
vector or constellation diagram, the
I/Q characteristic or the output spectrum
of a signal can be displayed, making it
possible to check whether the generated signal corresponds to the required
signal. This is of great help particularly
when complex signals are produced.
Another outstanding feature of the
¸SMU200A is its context-sensitive
online help. If the exact function of a parameter is not known, simply pushing
the help key instantaneously displays a
help text with information about the selected parameter. Further information
can be obtained through navigation with
a browser-like system. The help system
also specifies the relevant remote-control commands. Full-text searching in the
help system, which contains the complete operating manual, comes in handy
when complex measurement tasks are
to be performed. Tool tips are provided
in addition. If you pause on a parameter,
the currently permissible setting range is
displayed.
Graphics block with I/Q, vector
and spectrum diagram
More information about the user interface at
http://www.smu.rohde-schwarz.com/
Help system
Vector Signal Genera tor ¸SMU200A 5
Outstanding signal quality
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
SSB phase noise / dBc(1 Hz)
1 10 10210310410510610
7
2,1 GHz
Frequency offset / Hz
100 MHz
850 MHz
5,7 GHz
A
Ref -9.5 dBm Att 10 dB*
*
*
*1 RM
CLRWR
RBW 30 kHz
VBW 300 kHz
SWT 2 s
NOR
*
Center 2.16 GHz Span 25.5 MHz2.55 MHz/
SGL
PRN
-90
-80
-70
-60
-50
-40
-30
-20
-9.45
Tx Channel W-CDMA 3GPP FWD
Bandwidth 3.84 MHz
Pow er -6. 03 dBm
Adjacent Channel
Bandwidth 3.84 MHz
Low er - 70. 03 dB
Spacing 5 MHz
Upp er - 70. 40 dB
Alternate Channel
Bandwidth 3.84 MHz
Low er - 72. 96 dB
Spacing 10 MHz
Upp er - 73. 42 dB
-100
-100 -80 -60 -40 -20 0 20 40 60 80 100
-5
-4
-3
-2
-1
0
1
2
3
4
5
Frequency offset from c arrier / MHz
Delta / dB
RF 850 MHz
RF 1900 MHz
RF 2200 MHz
Owing to the sophisticated multiloop
synthesizer concept, the ¸SMU200A
features extremely low SSB phase noise
and wideband noise. A high-stability
oven-controlled reference oscillator is installed as standard, which provides excellent aging characteristics as well as
minimum temperature drift. In addition,
the low phase noise option further enhances the performance significantly. The ¸SMU200A is ideal, for instance, for LO or VCO substitution.
Typical SSB phase noise at 100 MHz, 850 MHz, 2.1 GHz and 5.7 GHz
Amplifiers of 3GPP base stations require
very good adjacent channel leakage ratio
(ACLR) performance in order not to impair the adjacent channels of the transmission. To test this feature, the ACLR
characteristics of the signal generator
must be better than those of the amplifier. Presently, multicarrier power amplifiers are increasingly used. In this case,
not only one but several neighboring signals in the frequency range are amplified. Testing such amplifiers places even
higher demands on signal generator capabilities. The outstanding ACLR characteristics of the ¸SMU200A more
than qualify the generator for this task.
with internal reference oscillator (without low phase noise option)
Outstanding ACLR characteristics
When external I/Q signals are applied, the ¸SMU200A features an
RF bandwidth of 200 MHz. If the internal baseband is used, an RF bandwidth
of 80 MHz is available, which is ideal
for testing multicarrier amplifiers. The
¸SMU200A is thus well prepared for
future broadband systems.
6 Vector Signal Genera tor ¸SMU200A
Frequency response (mode: external wideband I/Q)
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