¸SMB100A Signal Generator
Data sheet
Version
01.01
July
2007
CONTENT
CONTENT ..................................................................................................................................................................................................2
Key features ...............................................................................................................................................................................................3
Specifications .............................................................................................................................................................................................4
RF characteristics ...................................................................................................................................................................................4
Frequency ...........................................................................................................................................................................................4
Frequency sweep ................................................................................................................................................................................4
Reference frequency ...........................................................................................................................................................................4
Level....................................................................................................................................................................................................5
Level sweep ........................................................................................................................................................................................7
Spectral purity .....................................................................................................................................................................................7
List mode.............................................................................................................................................................................................8
Analog modulation ..................................................................................................................................................................................9
Possible modulation types...................................................................................................................................................................9
Simultaneous modulation ....................................................................................................................................................................9
Amplitude modulation..........................................................................................................................................................................9
Frequency modulation.......................................................................................................................................................................10
Phase modulation..............................................................................................................................................................................11
Pulse modulation (R&S®SMB-K22 option) ........................................................................................................................................12
Input for external modulation signals.................................................................................................................................................12
Modulation sources...............................................................................................................................................................................12
Internal modulation generator ...........................................................................................................................................................12
Pulse generator (R&S®SMB-K23 option) ..........................................................................................................................................13
General data.............................................................................................................................................................................................14
Remote control......................................................................................................................................................................................14
Operating data ......................................................................................................................................................................................14
Ordering information.................................................................................................................................................................................15
License information ..................................................................................................................................................................................15
R&S®SMB100A Signal Generator Version 01.01, July 2007
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Key features
Best signal quality in its class
• Low SSB phase noise of typ. –128 dBc (20 kHz carrier offset, 1 GHz carrier frequency, 1 Hz measurement bandwidth)
• Very low SSB phase noise even at low output frequencies (because a new DDS synthesizer is used from 9 kHz to
23.4375 MHz instead of a downconverter)
• 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, 1 Hz measurement bandwidth)
• Harmonics of typ. –30 dBc at the maximum specified output power of +18 dBm
… for high measurement accuracy in a wide variety of applications
Highest output power in its class
• 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 entire frequency range up to 6 GHz
… provides power reserve to replace external amplifiers
On-site servicing as convenient alternative
• Flexible concept allows servicing to be done 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 troubleshooting
• Verification of level accuracy and automatic level correction with a connected power sensor of the R&S NRP family
… 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/φM, 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 the signal flow facilitates operation
• Context-sensitive online help ensures efficient utilization of the instrument
… makes the R&S SMB100A the ideal signal source for a wide variety of applications
1
Ideal for production
• Short switchover times for frequency of typ. 1.6 ms and level of typ. 1.2 ms via remote control and <1 ms 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
… reduces production costs
Ready for aerospace and defense applications
• Optional pulse modulator offers excellent performance with typ. 90 dB on/off ratio and a rise/fall time of typ. 10 ns
• Flexible pulse generator with minimum pulse width of 20 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 applications
… expands the range of locations and applications for which the R&S SMB100A can be used
1
Available as of December 2007 via firmware update.
Version 01.01, July 2007 R&S®SMB100A Signal Generator
3
Specifications
Specifications apply under the following conditions:
30 minutes warm-up time at ambient temperature, specified environmental conditions met, calibration cycle adhered to, and total
calibration performed. Data designated ‘overrange’ or ‘underrange’ and data without tolerance limits is not binding.
RF characteristics
Frequency
Range
Resolution of setting 0.01 Hz
Resolution of synthesis f = 1 GHz 0.44 μHz
Setting time
Phase offset adjustable in 0.1° steps
Frequency sweep
Operating modes digital sweep in discrete steps
Sweep range full frequency range
Dwell time range 10 ms to 10 s
resolution 0.1 ms
R&S®SMB-B101 9 kHz to 1.1 GHz
R&S®SMB-B102 9 kHz to 2.2 GHz
R&S®SMB-B103 9 kHz to 3.2 GHz
®
R&S
SMB-B106 9 kHz to 6 GHz
to within <1 × 10−7 for f > 200 MHz or
<20 Hz for f ≤ 200 MHz
after IEC/IEEE bus delimiter <3 ms, typ. 1.6 ms
in ALC OFF mode (S&H) <7 ms
after trigger pulse in List mode <1 ms
automatic, step, single sweep,
external single, external step,
manual or external trigger,
linear or logarithmic spacing
linear full frequency range Step width
logarithmic 0.01 % to 100 % per step
Reference frequency
after 30 days of uninterrupted operation <1 × 10−6/year Aging
with R&S®SMB-B1 option <1 × 10
in temperature range 0 °C to 50 °C <2 × 10−6 Temperature effect
with R&S®SMB-B1 option <1 × 10
Warm-up time to nominal thermostat temperature (only
Output for internal reference signal
Input for external reference
with R&S®SMB-B1 option)
frequency (approx. sinewave) 10 MHz
level typ. 10 dBm
source impedance 50 Ω
frequency 10 MHz
maximum deviation 3 × 10−6
input level, recommended ≥0 dBm, ≤16 dBm
input impedance 50 Ω
≤10 min
−9
/day, <1 × 10−7/year
−7
R&S®SMB100A Signal Generator Version 01.01, July 2007
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Level
The R&S®SMB100A has two different attenuator modes for level setting:
AUTO MODE: In this mode, the attenuator is switched automatically. The output level is specified over the full range from –120 dBm
to +13/18 dBm.
FIXED MODE: The level is set without switching the attenuator. The attenuator is fixed to the current setting. If ALC state is ON, level
changes are performed without interruption. The maximum attenuation range is limited. With higher attenuation, the spectral purity of
the output signal decreases.
Setting range –145 dBm to +30 dBm
Specified level range with
®
R&S
SMB-B101/102/103/106 frequency
option
1 MHz < f ≤ 6 GHz
200 kHz < f ≤ 1 MHz
–120 dBm to + 18 dBm (PEP)
–120 dBm to + 13 dBm (PEP)
2
Resolution 0.01 dB
Level uncertainty
ALC state ON, AUTO mode
temperature range 18 °C to 33 °C
200 kHz < f ≤ 3 GHz <0.5 dB
f > 3 GHz <0.9 dB
Additional uncertainty with ALC OFF, S&H This mode is only needed in case of pulse
<0.5 dB
modulation.
Output impedance VSWR in 50 Ω system 200 kHz < f ≤ 6 GHz <1.8
Setting time
after IEC/IEEE bus delimiter,
with GUI update stopped,
AUTO mode,
temperature range 18 °C to 33 °C,
to <0.1 dB deviation from final value
ALC state ON <2.5 ms, typ. 1.2 ms
ALC state OFF <7 ms
in List mode after trigger pulse <1 ms
FIXED mode, ALC state ON Uninterrupted level setting
setting range >20 dB
Reverse power (from ≥50 Ω source)
maximum permissible RF power in output
frequency range of RF path for f > 1 MHz
1 MHz < f ≤ 1 GHz 50 W
1 GHz < f ≤ 2 GHz 25 W
2 GHz < f ≤ 6 GHz 10 W
maximum permissible DC voltage 50 V
2
PEP = peak envelope power.
Version 01.01, July 2007 R&S®SMB100A Signal Generator
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