LDA Series

RF and Microwave USB Programmable Digital Attenuators

Vaunix LDA series Lab Brick RF and Microwave USB Programmable Digital Attenuators include 50 Ohm and 75 Ohm bi-directional RF step attenuators with calibrated operation up to 20 GHz. These low cost, portable, USB powered, hand-held wireless test devices are ideal for engineering and production test laboratories, field testing, and integration into high speed automatic-test- equipment (ATE) systems. They’ve been proven effective in the rapid and efficient development of wireless fading simulators for Multiple Input Multiple Output (MIMO), and Single Input Multiple Output (SIMO) wireless communication systems, such as WiMAX, 3G, 4G, and LTE. They’re also useful by wireless test engineers exploring next-generation 5G wireless systems.


Learn more about our USB Programmable RF Digital Attenuator technology, packaging, and what’s included with each device.


LDA Series Lab Brick RF and Microwave USB Programmable Digital Attenuators are designed with advanced solid-state attenuator technology for excellent repeatability of attenuation values. These USB powered and controlled, hand-held wireless test devices require no additional DC supply voltage. They’re portable and are easily programmable for fixed attenuation or swept attenuation ramps directly from the included Microsoft Windows compatible GUI.


Packaging and Compliance

Dual port Lab Bricks are housed in rugged aluminum enclosures, some measuring 3.86 x 2.52 x 1.35 in. (98 x 54 x 34 mm) and weighing just 0.5 lb. (0.23 kg), and others measuring 4” x 2.5” x 0.95” (101.6 x 63.5 x 23.9 mm) and weighing 0.6 lbs (0.27 Kg). (See each model’s detail page for mechanical specifications). 4 port Lab Bricks measure 7.3” x 2.5” x 0.95” (185.4 x 63.5 x 24.1 mm) and weigh 0.9 lbs (0.41 Kg). All Lab Brick LDA Digital Attenuators are RoHS compliant.


What’s Included

Each Lab Brick attenuator comes with a USB flash drive containing the GUI software, Microsoft Windows SDK, Linux SDK, LabVIEW driver, a digital version of the programming guide, and a 6- ft. USB cable. Optional length cables, battery packs, and ruggedized USB hubs are available separately. All Lab Brick products come with Vaunix’s committed customer support.


  • Portable, robust aluminum packages
  • Easily programmable for custom ATE applications
  • No DC supply voltage required
  • Operates from a PC or self-powered USB hub
  • Drivers include: Linux, LabView
  • API DLL included
  • Compatible with Microsoft Windows
  • Intuitive graphic user interface (GUI)
  • Includes easy to install and operate software and API
  • USB powered and controlled
  • Programmable fixed or swept attenuation ramps
  • Bi-directional RF step attenuation
  • 50 or 75 Ohm options
  • Calibrated operation up to 20 GHz


  • Engineering and production test labs
  • MIMO and SIMO testing
  • Wireless fading simulation
  • 5G wireless research and development
  • 3G and 4G wireless simulation
  • WiMAX testing
  • RF and microwave Automated Test Equipment (ATE)
LDA Series
RF and Microwave USB Programmable Digital Attenuators





LDA-302P-110-3000501631.0+33512 us typ.SMAMiniB
LDA-302P-H10 to 300050131.50.5+33512 us typ.SMAMiniB
LDA-302P-HN10 to 300050131.50.5+33512 us typ.Type NMiniB
LDA-602Q200 to 60005041200.1+286.50.515 us typ.SMAB
LDA-1026 to 1000501630.5+226170 ns typ.SMAMiniB
LDA-102N6 to 1000501630.5+226170 ns typ.Type NMiniB
LDA-102-75F10 to 1000751950.5+30511.5 us typ.Type FMiniB
LDA-102E10 to 10005011200.5+304.51.54 us typ.SMAB
LDA-302P-1N10-3000501631.0+33512 us typ.Type NMiniB
LDA-302P-210 to 3000501902.0+33512 us typ.SMAMiniB
LDA-302P-2N10 to 3000501902.0+33512 us typ.Type NMiniB
LDA-6026 to 6000501630.5+228170 ns typ.SMAMiniB
LDA-602N6 to 6000501630.5+228170 ns typ.Type NMiniB
LDA-602E400 - 60005011200.5+306.51.54 us typ.SMAB
LDA-602EH200 to 60005011200.1+286.50.515 us typ.SMAB
LDA-2031000 to 20000501630.5+23131.5100 ns typ.SMAB
LDA-906V200 – 6000501900.1+2850.2515 us typ.SMAType B
LDA-13310 - 13,000502630.5+2281.550SMAB
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