Sigint Solutions


LSG Signal Generators

The Lab Brick LSG series of USB-compatible signal generators covers frequencies from 20 MHz to 6 GHz with high output levels and excellent spectral purity.

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The LSG series require no additional DC supply voltage and offer several operating modes, including continuous-wave (CW) and swept-frequency. GUI software can track and control several connected signal generators, simplifying multiple-signal test setups. Each device stores settings in internal memory, allowing it to power up in a specific instrument state. Each device comes with a USB flash drive containing the GUI software and digital version of the programming guide, along with a 6-ft. USB cable. It measures 4.90 x 3.14 x 1.59 in. (124 x 80 x 40 mm) and weighs less than 1 lb. (0.45 kg). In non-USB applications, the Lab Brick® signal generators can operate with battery power or remote power supply. For automatic-test-equipment (ATE) applications, a programming guide is available for each Lab Brick® signal generator. In addition, they are programmable by means of LabVIEW software drivers from National Instruments (

Lab Brick® signal generators comply with international requirements for electromagnetic-compatibility (EMC) emissions and immunity for Class A ISM devices to ensure that they don't interfere with other ISM-band equipment. All Lab Brick LSG signal generators are ROHS compliant and can be used with any PC or laptop computer with USB 2.0 port (or powered USB hub) and Windows 2000, XP, Vista, or Windows 7 operating system.

Features and Benefits
  • USB powered and controlled
  • Includes easy-to-install-and-use GUI
  • Programmable frequency stepping
  • Operate multiple devices directly from a PC or self-powered USB hub
  • Autonomous operation from USB hub or battery pack
  • Easily programmable for ATE applications
  • Robust aluminum construction
  • Customization available for unique requirements
  • API DLL and LabVIEW compatible drivers available
  • Automated Test Equipment (ATE)
  • Portable LO Source
  • Engineering/Production Test Lab

Technical Specifications

 Standard Models1 LSG-121 LSG-251 LSG-451 LSG-152 LSG-222 LSG-402 LSG-602
Frequency Range [MHz] 20-120 50-250 70-450 250-1500 500-2200 1000-4000 1500-6000
Phase Noise at
Offset [dBc/Hz]
-105/-125 -105/-125 -105/-125 -95/-115 -90/-110 -85/-105 -75/-95
Frequency Resolution 100kHz      
Frequency Accuracy +/- 2ppm       
Output Power Range2 +10 - -45 dBm3       
Output Power Resolution 0.5 dB       
Output Power Accuracy +/-0.5 dB at +10 dBm
        +1.5/-0.5 dB full range       
Spurius Typical -80 dBc       
Spurius Maximum  -70 dBc      
VSWR(max.) 1.5:1
 Harmonics (max.)  -10 dBc      
 DC Current via USB 400 mA typical       
 RF Connector        SMA-female
 USB Connector    MiniB-female    
Dimensions 4.90 x 3.14 x 1.59 in. (124 x 80 x 40 mm)
Weight < 1.0 lb. (< .45 kG)
Mounting Holes (2) #6 socket head screws (not included)
Standard Operating Modes Fixed frequency
Frequency stepping - single sweep
Frequency stepping - repeat sweep
Available Options
Opt 001
External reference
Available Options
Opt 002
+13 dBm output power
GUI Compatibility Windows 2000/XP/Vista/7
Included Accessories USB Flash Drive with GUI Software & User Manual/Programming Guide
6-ft. USB Cable
Notes 1Customized models are available tailored to specific performance requirements.
2 Output power capability to +26 dBm on select models.
3 +10 to -40 dBm for the LSG-602.
Specifications are subject to change without notice.