SMB100A

Versatile, compact, up to 40 GHz; 170 GHz with upconverter

The compact, versatile R&S®SMB100A microwave signal generator with a frequency range up to 40 GHz provides outstanding spectral purity and high output power. In addition, it features easy operation, comprehensive functionality and low cost of ownership.
The R&S®SMB100A provides microwave characteristics that are exceptional in its class, making it an excellent general-purpose instrument. These outstanding characteristics plus its compact size and low weight make the instrument ideal for a wide range of applications. The R&S®SMB100A is optimally suited for use in development, production and service, or, to put it even simpler: wherever an analog microwave signal is required. Its wide frequency range covers a large number of challenging applications. The R&S®SMB100A is the perfect choice for applications in the important ISM bands up to 5.7 GHz.
Furthermore, the R&S®SMB100A can be ideally used for measuring the blocking characteristic up to a CW ­frequency of 12.75 GHz, as specified in various telecommunications standards. When it comes to frequently changing level ­settings, this is the first time that a wearfree electronic step attenuator is used in this frequency range. Four frequency options up to 12.75 GHz, 20 GHz, 31.8 GHz and 40 GHz are available to cover the microwave range. These options are suitable for tests on radar systems and antennas in the X and K bands, for example for wideband receiver tests. For even higher frequencies, the frequency range of the R&S®SMB100A can be easily extended with the R&S®SMZ frequency multiplier. The R&S®SMB100A plus R&S®SMZ solution combines easy handling with precise, ­adjustable output levels in the frequency range from 50 GHz to 110 GHz (adjustable output levels are not possible with R&S®SMZ170). In addition to pure CW signals, the R&S®SMB100A also provides the most common analog AM and FM/φM modulation modes as standard. Moreover, the R&S®SMB100A can be equipped with an excellent pulse generator and pulse modulator that makes it possible to generate userprogrammable pulse scenarios, also referred to as pulse trains.

Features

• All-purpose signal source
  • Wide frequency range from 100 kHz to 12.75/20/ 31.8/40 GHz covering the main frequency bands for microwave applications
  • Frequency extension from 50 GHz to 170 GHz in combination with the R&S®SMZ frequency multiplier
  • All important analog modulations with AM, FM/φM and pulse modulation supported
  • Support of R&S®NRP-Zxx power sensors
  • Reverse power protection for high operational reliability (optionally available for the 12.75 GHz model)
  • Intuitive user interface with graphical display of signal flow for easy operation
  • Remote control via LAN, USB and GPIB including emulation modes for legacy instruments
  • Low weight and compact design for a wide range of applications, including mobile applications


• Best signal quality in the mid-range
  • Very low SSB phase noise of typ. –128 dBc at 1 GHz and typ. –108 dBc at 10 GHz carrier frequency (20 kHz carrier offset, 1 Hz measurement bandwidth)
  • Optional internal low harmonic filters for the 20 GHz and 40 GHz model to lower the harmonics to less than –50 dBc for frequencies above 150 MHz
  • Innovative DDS-based synthesizer concept


• High output power and wide level range
  • High power over a wide frequency range
  • Low level range down to –120 dBm (for instruments equipped with step attenuator) with no compromise in quality
  • High harmonics suppression of < –30 dBc even at high output power


• Ideal for production
  • Wear-free electronic attenuator up to 12.75 GHz ensuring long life even in the case of heavy use in production
  • High level accuracy and repeatability for high production yield
  • Closed loop power control ensures highly accurate and very stable input power to the DUT irrespective of unwanted power drifts in the test setup (e.g. caused by a power amplifier in between the signal generator and the DUT)
  • Short frequency and level settling times which can be further reduced in List mode
  • Low power consumption

Specifications

Specifications in brief
Frequency range
Frequency range	R&S®SMB-B112/-B112L	100 kHz to 12.75 GHz
	R&S®SMB-B120/-B120L	100 kHz to 20 GHz
	R&S®SMB-B131	100 kHz to 31.8 GHz
	R&S®SMB-B140/-B140L/-B140N	100 kHz to 40 GHz
Settling time	SCPI mode	< 3 ms
	List mode	< 1 ms
Level
Maximum specified output power (PEP)	R&S®SMB-B112/-B112L, 1 MHz < f ≤ 12.75 GHz	+18 dBm
	R&S®SMB-B120 with R&S®SMB-B31, 50 MHz < f ≤ 20 GHz	+16 dBm
	R&S®SMB-B120L with R&S®SMB-B31, 100 MHz < f ≤ 20 GHz	+19 dBm
	R&S®SMB-B131/-B140/-B140N with R&S®SMB-B32, 50 MHz < f ≤ 40 GHz	+13 dBm
	R&S®SMB-B140L with R&S®SMB-B32, 50 MHz < f ≤ 40 GHz	+16 dBm
Minimum specified output power	R&S®SMB-B112/-B120/-B131/-B140/-B140N	–120 dBm
	R&S®SMB-B112L	–5 dBm
	R&S®SMB-B120L/-B140L	0 dBm
Settling time (without switching of the mechanical attenuator)	SCPI mode	< 2.5 ms
	List mode	< 1 ms
Spectral purity
SSB phase noise	f = 1 GHz, carrier offset = 20 kHz, 1 Hz measurement bandwidth	< –122 dBc, typ. –128 dBc
	f = 10 GHz, carrier offset = 20 kHz, 1 Hz measurement bandwidth	< –102 dBc, typ. –108 dBc
Harmonics
R&S®SMB-B112/-B112L	1 MHz < f ≤ 6 GHz; level ≤ 13 dBm 1), f > 6 GHz; level ≤ 10 dBm1)	< –30 dBc
R&S®SMB-B120/-B120L/-B131/-B140/ -B140N/-B140L	standard; level ≤ 8 dBm1)
	f > 1 MHz	< –30 dBc
	with R&S®SMB-B25/-B26 low harmonic option, low harmonic filter on, level ≤ 10 dBm 1)
	1 MHz < f ≤ 150 MHz	< –30 dBc
	150 MHz < f ≤ 3 GHz	< –58 dBc
	3 GHz < f ≤ 20 GHz	< –50 dBc
	f > 20 GHz	< –60 dBc (meas.)
Supported modulation modes
AM		Standard
AM depth		0% to 100%
FM/φM		Standard
Maximum FM deviation	f = 10 GHz	32 MHz
Maximum φM deviation	f = 10 GHz	320 rad
Pulse	R&S®SMB-K21/-K22 pulse modulator
Rise/fall time		< 20 ns, typ. < 5 ns
ON/OFF ratio		> 80 dB
Minimum pulse width of pulse generator output		10 ns
Connectivity
Remote control		GPIB IEEE-488.2, Ethernet (TCP/IP), USB
Peripherals		USB

¹⁾ Or maximum specified output power, whichever is lower.