¸SMB100A Signal Generator
Setting standards in the mid-range
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The technical characteristics of the ¸SMB100A set new standards in the mid-range
Excellent signal characteristics, high
flexibility, plus low cost of ownership
are key criteria when it comes to selecting a signal source. The analog
¸SMB100A signal generator superbly handles all these requirements,
as a well-planned effort to fulfill them
was made right from the initial stages
of development. The technical characteristics of the ¸SMB100A set new
standards in the mid-range, especially
the generator’s high output power and
signal purity. Moreover, the service concept of the ¸SMB100A enables users to perform maintenance themselves.
The straightforward modular design allows servicing to be performed on-site
– quickly and easily. This ensures low
total cost of ownership, plus high availability in labs and production.
The ¸SMB100A provides RF characteristics that are exceptional in its class,
making it an excellent general-purpose
instrument. These excellent RF characteristics plus its compact size and low
weight make the instrument ideal for a
wide range of different applications. The
¸SMB100A is thus ideal for use in
development, production, and service,
or, to put it even simpler: wherever an
analog RF signal is required.
The ¸SMB100A is outstanding for its
comprehensive standard equipment and
hardly needs any additional options.
Its wide frequency range of 9 kHz to
6 GHz covers a large number of crucial
RF applications. The ¸SMB100A
is thus the perfect choice for applications in the important ISM bands up to
5.7 GHz as well as for EMC applications
because of its lower frequency limit of
9 kHz. In addition to pure CW signals, it
also provides the most common analog
AM and FM/jM modulation modes as
standard. Moreover, the ¸SMB100A
can be equipped with an excellent pulse
generator and modulator, allowing it to
handle pulse applications.
¸SMB100A Signal Generator
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at a glance
High output power as standard
◆ Specified output power of >+18 dBm
over the wide frequency range of
1 MHz to 6 GHz
◆ Typical maximum level of +25 dBm
(in overrange) over the frequency
range up to 6 GHz
Best signal quality in the mid-range
◆ Low SSB phase noise of typ.
–128 dBc (20 kHz carrier offset, 1 GHz
carrier frequency, 1 Hz measurement
◆ Very low SSB phase noise even
at low output frequencies (a new
DDS synthesizer from 9 kHz to
23.4375 MHz is used instead of a
◆ Nonharmonics suppression of typ.
–85 dBc (>10 kHz carrier offset,
carrier frequency <1.5 GHz)
◆ Low wideband noise of typ. –152 dBc
(>10 MHz carrier offset, 1 GHz carrier
frequency, level >5 dBm)
◆ Harmonics of typ. –30 dBc at the
maximum specified output power of
+18 dBm
On-site servicing as convenient
◆ Flexible concept allows servicing to be performed on site or by a
Rohde & Schwarz service center
◆ Straightforward modular instrument
design with only four exchangeable
modules ensures short repair times
◆ Calibrated replacement modules
make extensive calibration and adjustment tasks unnecessary
◆ Built-in selftest of modules supports
◆ Verification of level accuracy and
automatic level correction with a
connected power sensor of the
¸NRP-Zxx family
… provides power reserve to
replace external amplifiers
… for high measurement accuracy in
a wide variety of applications
… ensures low cost of ownership and
maximum instrument availability
All-purpose RF source
◆ Wide frequency range from 9 kHz
to 6 GHz covers the main frequency
bands for RF applications
◆ Integrated frequency, level, and
LF sweeps
◆ All important analog modulations
with AM, FM/jM, and pulse modulation supported
◆ Internal LF generator provides sinewave signals up to 1 MHz as well as
squarewave signals up to 20 kHz
◆ Intuitive user interface with graphical display of signal flow facilitates
◆ Context-sensitive online help ensures
efficient utilization of the instrument
Ideal for production
◆ Short switchover times for frequency
of typ. 1.6 ms and level of typ. 1.2 ms
via remote control and typ. 650 µs in
the List mode allow high throughput
◆ High level accuracy and repeatability
are the basis of high production yield
◆ High output power of up to +25 dBm
compensates level loss on the way to
the DUT
◆ Wearfree electronic attenuator with
overvoltage protection up to 6 GHz
as standard ensures long service life
even in the case of heavy use in production
◆ Compact design with only two height
units saves rack space
◆ Remote control via LAN, USB, and
GPIB allows easy integration into the
test system
Ready for aerospace and defense
◆ Optional pulse modulator
(¸SMB-K22) offers excellent
performance with typ. 90 dB on/off
ratio and a rise/fall time of typ. 4 ns
◆ Flexible pulse generator
(¸SMB-K23 option) with minimum pulse width of 10 ns allows the
generation of various pulse signals
◆ Wide temperature range of 0 °C to
55 °C and maximum permissible operating altitude of 4600 m above sea
level allow the instrument to be used
even under extreme conditions
◆ Low weight of only 5.3 kg for mobile
… makes the ¸SMB100A the
ideal signal source for a wide variety
of applications
… reduces production costs
… expands the range of locations
and applications for which the
¸SMB100A can be used
¸SMB100A Signal Generator
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Best signal quality in the
Phase noise, harmonics, and nonharmonic spurious, as well as wideband
noise are key parameters when it comes
to characterizing the spectral properties of analog signal generators. Many
measurements focus on more than one
aspect simultaneously. For example, in
blocking measurements, nonharmonics
together with phase noise are essential
in generating the usually unwanted RFI
power in the adjacent channel.
When it comes to SSB phase noise performance, the ¸SMB100A consistently achieves excellent values over the
entire frequency range from 9 kHz to
6 GHz. This is due to its remarkable concept. The ¸SMB100A works down
to 23.3475 MHz with frequency dividers. Below this value, the integrated
DDS synthesizer generates the output
signal directly. In contrast, conventional
designs use a mixer range below approx. 250 MHz, which results in a much
worse phase noise performance. The
¸SMB100A is thus the ideal replacement in test circuits for fixed-frequency
high-end crystal oscillators that are
often used as a reference signal. The
¸SMB100A combines equal or even
improved signal performance with adjustable frequency and adjustable level,
which is highly beneficial as it can thus
be ideally adapted to the DUT. Moreover, the ¸SMB100A makes it possible to define the DUT tolerance range
relative to the reference by varying these
Typical SSB phase noise with internal OCXO (¸SMB-B1 option)
SSB phase noise in dBc/Hz
The ¸SMB100A superbly handles
these requirements. Due to its innovative DDS-based synthesizer concept,
the ¸SMB100A yields unsurpassed
values in all parameters called for in the
mid-range, thus setting new standards.
Carrier frequency in MHz
Typical SSB phase noise at 20 kHz offset versus frequency with internal OCXO (¸SMB-B1 option)
¸SMB100A Signal Generator
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High output power as standard
Measured maximum output power versus frequency
The ¸SMB100A combines excellent
signal quality with a high output power
of >+18 dBm, which is unique in this
instrument class, over a wide frequency
range of 1 MHz to 6 GHz. The maximum
available output power is typ. +25 dBm
(and thus even significantly higher), offering sufficient power reserve to easily
compensate for level loss in a test setup.
This usually eliminates the need for an
additional external amplifier, thus saving space and also drastically reducing
costs for a test system. In applications,
users additionally benefit from the high
level accuracy that the ¸SMB100A
provides – a level accuracy that is not
necessarily provided if an external amplifier is used. Its high output power makes
the ¸SMB100A ideal for controlling
high-power devices such as high-level
What’s special about the
¸SMB100A is that harmonics are
still suppressed with typ. –30 dBc even
at an output power of +18 dBm.
But even in the lower level range, the
¸SMB100A makes no compromise in
quality. The RF level can be set down to
–145 dBm as standard. Thus, the generator is ideally suited for sensitivity measurements on receivers.
Measured harmonics at +18 dBm versus frequency
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The ¸SMB100A with connected
¸NRP-Zxx power sensor performs
automatic level correction
On-site servicing as convenient
The ¸SMB100A is designed for
maximum reliability and easy servicing.
Thus, uptime can be maximized in all application fields and cost of ownership
significantly reduced. Customers can
choose between calling on a certified
Rohde & Schwarz service center as usual
or servicing the instrument themselves.
All corrections necessary after a repair
are carried out fully automatically by
the instrument itself. To additionally
optimize level accuracy after servicing,
a new level correction can be performed
in a fully automated manner by means
of an ¸NRP-Zxx power sensor that is
connected to the ¸SMB100A.
A complete calibration is recommended
for the ¸SMB100A only every three
years and can, of course, also be performed on-site.
A built-in selftest carries out an operational check of the instrument and
serves as a troubleshooting aid during
servicing. The simple and straightforward architecture with only four modules cuts the time required for troubleshooting and repair to a minimum. Moreover, if a module has to be replaced,
the ¸SMB100A does not need to
be recalibrated as all replacement modules come fully adjusted. A simple function check is usually sufficient to ensure
the outstanding specifications of the
¸SMB100A. Do-it-yourself servicing
can be completed within only 45 minutes on average.
A minimum of modules in the ¸SMB100A
means high reliability and easy servicing
¸SMB100A Signal Generator
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Wide frequency range, high output power, and a variety of possible modulations make the
¸SMB100A a flexible signal source for a broad scope of applications
All-purpose RF source
The signal generator’s wide frequency
range, high output power, plus a wide
variety of possible modulations make it
a flexible signal source for a broad scope
of applications. Its minimum frequency
of 9 kHz permits applications in EMC
measurements. Its maximum frequency
of 6 GHz covers ISM bands as well as all
important mobile radio bands.
The ¸SMB100A handles the important analog AM, FM/jM modulation modes and pulse modulation with
excellent characteristics. In AM and
FM/jM modulation, the RF carrier is
modulated with the internal LF generator in the range up to 1 MHz, or also with
externally applied signals. Of course,
the two different sources of modulation can be internally added to generate two-tone-modulated signals. Due
to its digital modulation processing, the
¸SMB100A implements the modula-
tion modes with high accuracy and only
minimum distortion. For example, AMmodulated signals in the high-frequency
range are generated with a total harmonic distortion of typ. only 0.1%.
The standard overvoltage protection up
to 6 GHz protects the ¸SMB100A
from high external voltages and high
power applied at the RF output. This
feature shields the RF output from unwanted high reverse power and ensures
a high degree of operational reliability.
The generator’s compact size of only two
height units and ¾ 19” width coupled
with its low weight of only about 5 kg
make it ideal for mobile use. It easily fits
into any lab and service center, where
space is often at a premium.
hand. To support graphical operation, a
mouse can be connected via USB.
The ¸SMB100A is also ideally
equipped with regard to the remote-control interface. In addition to conventional
GPIB, it also supports LAN and USB as
standard. This is of special advantage in
environments such as service labs where
there is often no GPIB.
Of course, the ¸SMB100A also
supports the power sensors of the
¸NRP-Zxx family. The ¸NRP-Z92
is a power sensor that ideally complements the frequency and level range
of the generator. Equipped with such a
power sensor, the ¸SMB100A fully
automatically performs external level
correction or precisely measures the
power in the test setup.
Intuitive operation via the graphical user
interface and the integrated help system facilitate the optimum use of the
¸SMB100A for the application at
¸SMB100A Signal Generator
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Ideal for production
The wearfree electronic attenuator
of the ¸SMB100A functions reliably, even if the level values frequently
change. As a result, high availability in
the test system is ensured. Moreover,
the standard overvoltage protection
shields the ¸SMB100A against high
reverse power or DC voltage on the RF
The ¸SMB100A offers a very high
level sweep range of typ. –145 dBm to
+25 dBm as standard, as well as high
level accuracy and repeatability over the
entire range. Measurements within narrow limits can thus be performed with
high reproducibility, boosting production
Another criterion in production is short
setting time of the test instrument in
order to achieve high throughput. The
¸SMB100A meets this requirement
by achieving short frequency (typ. 1.6 ms)
and level (typ. 1.2 ms) setting times in
the regular operating mode. Plus, it features the List mode as standard, which
reduces the setting times to well below
1 ms.
The extremely compact design of the
¸SMB100A with only two height
units makes it easy to integrate the instrument into any test system, thus saving precious rack space.
Measured level repeatability at 3 GHz, 5 dBm, ALC ON
Especially in production environments, a generator’s maximum output power is a key criterion when it
comes to compensating for any power
loss that may occur. This is where the
¸SMB100A comes into its own, featuring >+18 dBm. Thus, it can replace
external power amplifiers, saving space
and reducing setup costs.
Time in ms
Measured frequency setting time statistics for remote control over
10000 settings
Ready for aerospace and
defense applications
modulation signal by the internal pulse
Pulsed signals are frequently required in
aerospace and defense applications to
test radar systems. To meet this need,
the ¸SMB100A can be equipped
with an integrated pulse modulator
(¸SMB-K22) and pulse generator
(¸SMB-K23) with superb characteristics. The pulse modulator, for example,
makes it possible to perform radar tests
with a high on/off ratio of typ. 90 dB
and very short rise/fall times of typ. 4 ns.
The pulse modulator is either controlled
by an external video signal or it is supplied with single or double pulses as a
The ¸SMB100A functions reliably
under extreme conditions owing to its
wide temperature range of 0 °C to 55 °C
and a maximum permissible operating
altitude of 4600 m above sea level.
To meet requirements for secured areas,
an erase and sanitize procedure is being
developed that reliably erases user data.
This ensures that no sensitive data will
leave the secured area. Moreover, LAN
and USB ports can be disabled by means
of a security password.
¸SMB100A Signal Generator
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Testing of FM stereo and RDS
FM stereo is still the major audio broadcasting medium – especially in the automobile sector, where millions of car
radios are produced every year. For testing FM stereo receivers, audio test signals are modulated onto an RF carrier
and measured after demodulation by the
DUT. Test signals are also needed for the
radio data system (RDS), established in
many countries for a long time.
The optional stereo/RDS ­coder
(¸SMB-B5) meets all the
above requirements. Built into the
¸SMB100A, the solution is based
on equipment that features an excellent price/performance ratio as well as
top-class specifications and provides
full coverage of the frequency range in
The internal LF generator, which is
suitable for general receiver tests, is
part of the basic configuration of the
¸SMB100A. It generates sinusoidal
signals at fixed or swept LF frequencies,
thus allowing basic functional tests to be
carried out without an external signal.
Typical test setup with ¸UPV audio analyzer
The stereo/RDS coder also works with
external signals applied to its analog (left
and right) or digital (S/P DIF) modulation
inputs. Combining the ¸SMB100A
signal generator and the ¸UPV audio
analyzer creates a general-purpose test
system for FM receivers. The great advantage is the automatic synchronization
of measurement results. Just as in other
audio measurements, the test signals
are produced in the generator section
of the audio analyzer, routed to the DUT
through the ¸SMB100A as a modulator, and measured in the analyzer section
of the ¸UPV. Since generation and
analysis are optimally timed, measurement times are considerably shorter than
with separately operating instruments.
The ¸SMB100A with the
¸SMB‑B5 option generates the stereo multiplex signal, including ARI and
RDS information, and outputs the signals
on the RF. It is possible to choose between traffic announcement identification and standardized area identification
A to F. The RDS traffic program or RDS
traffic announcement can be switched
on and off. Up to five different RDS sequences can be loaded. Due to a length
of up to 64000 characters per sequence,
longer RDS applications such as radio
text can be tested as well.
Summary of benefits
Best signal quality in the mid-range expands the instrument‘s
scope of use and ensure high measurement accuracy in the diverse applications of the ¸SMB100A. The high signal quality
and repeatability of the ¸SMB100A make for narrow measurement limits which are essential in increasing production
On-site servicing as convenient alternative enables users to
perform servicing themselves. On-site servicing improves maximum instrument availability and optimizes cost of ownership due
to cost-efficient and convenient maintenance. Customers can, of
course, also call on a certified Rohde & Schwarz service center to
handle the job.
High output power as standard offers sufficient level for highpower DUTs or compensates for attenuation in the signal flow
toward the DUT. The ¸SMB100A makes external amplifiers
superfluous, thus streamlining the test setup.
The excellent ¸SMB100A offers a unique price/performance ratio and sets new standards in the mid-range.
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Specifications in brief
Frequency range
9 kHz to 1.1 GHz
9 kHz to 2.2 GHz
9 kHz to 3.2 GHz
9 kHz to 6 GHz
SCPI mode
List mode
<3 ms, typ. 1.6 ms
<1 ms
Maximum output power
f = 1 MHz to 6 GHz
>+18 dBm
up to +25 dBm in Overrange mode
Level uncertainty
f = 200 kHz to 3 GHz
<0.5 dB
Setting time
SCPI mode
List mode
<2.5 ms, typ. 1.2 ms
<1 ms
f = 1 MHz to 1 GHz
f = 1 GHz to 2 GHz
f = 2 GHz to 6 GHz
50 W / 50 V
25 W / 50 V
10 W / 50 V
Setting time
Spectral purity
level ≤8 dBm, f > 1 MHz
<–30 dBc
carrier offset >10 kHz, f ≤ 1500 MHz
<–70 dBc (typ. –85 dBc)
SSB phase noise
f = 1 GHz
carrier offset = 20 kHz
1 Hz measurement bandwidth
<–122 dBc (typ. –128 dBc)
Wideband noise
level > 5 dBm
carrier offset >10 MHz
1 Hz measurement bandwidth
<–142 dBc (typ. –152 dBc)
Supported modulation modes
AM depth
0 to 100 %
Maximum FM deviation
f > 3 GHz
16 MHz
Maximum jM deviation
f > 3 GHz
160 rad
optional (¸SMB-K22 pulse modulator)
Rise/fall time
Minimum pulse width
On/off ratio
<20 ns, typ. 4 ns
using the optional pulse generator
10 ns
>80 dB
Remote control
Ethernet (TCP/IP)
¸SMB100A Signal Generator
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Ordering information
Order No.
9 kHz to 1.1 GHz
9 kHz to 2.2 GHz
9 kHz to 3.2 GHz
9 kHz to 6 GHz
Reference Oscillator OCXO
Stereo/RDS Coder
Pulse Modulator
Pulse Generator
Base unit
Signal Generator1)
RF Path
Recommended extras
Hardcopy manuals (in English, UK)
Hardcopy manuals (in English, US)
19" Rack Adapter
Power Sensor 9 kHz to 6 GHz
Keyboard with USB Interface (US character set)
Mouse with USB Interface, optical
Two-Year Calibration Service
please contact your local sales office
Three-Year Calibration Service
Five-Year Calibration Service
One-Year Repair Service following the warranty period
Service options
Two-Year Repair Service following the warranty period ¸RO3SMB100A
Four-Year Repair Service following the warranty period ¸RO5SMB100A
Documentation of Calibration Values
DKD (ISO 17025) Calibration including ISO 9000
calibration (can only be ordered with the device)
The base unit must be ordered together with an R&S®SMB-B101/R&S®SMB-B102/R&S®SMB-B103/R&S®SMB-B106 frequency option.
¸SMB100A Signal Generator
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Certified Environmental System
ISO 9001
ISO 14001
For data sheet, see 5213.8396.22
(search term: SMB100A)
¸ is a registered trademark of Rohde & Schwarz GmbH & Co. KG · Trade names are trademarks of the owners · Printed in Germany (we/ed)
PD 5213.8396.12 · Version 02.00 · July 2008 · ¸SMB100A · Data without tolerance limits is not binding · Subject to change *0.14 €/min within German wireline network; rates may vary in other networks (wireline and mobile) and countries.
Certified Quality System
Europe, Latin America, Africa, Middle East Tel. +49 1805 124242* or +49 89 4129 13774
North America +1-888-837-8772
Asia | Pacific +65 65 130 488
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