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Lab Brick LDA Series Digital Attenuators

Lab Brick LDA Series Digital Attenuators

DC – 20 GHz Programmable Digital Attenuators

• Input power to 2 Watts

• USB powered and controlled

• Includes easy to install and use GUI

• Programmable attenuation ramp

• Operate multiple devices directly from a PC or self powered USB hub

• Easily programmable for ATE applications


Data Sheets



The LDA series of Lab Brick® Digital RF Attenuators includes 50 Ohm and 75 Ohm bidirectional RF step attenuators with calibrated operation up to 20 GHz. These units connect to a USB port for control and power and require no additional DC supply voltage. They are easily programmable for fixed attenuation or swept attenuation ramps directly from the included GUI. Lab Brick Digital Attenuator API DLL, Linux drivers and LabVIEW-compatible drivers are also available for custom programming applications. Lab Brick LDA Series Digital Attenuators

The Lab Brick Digital Attenuators are ideal for engineering and production test laboratories as well as integration into high speed automatic-test-equipment (ATE) systems. They can also be used in development of low-cost fading simulators for Multiple Input Multiple Output (MIMO) and Single Input Multiple Output (SIMO) communication systems such as WiMAX, 3G and LTE. They are based on solid state attenuator technology for excellent repeatability of attenuation values.

Each device comes with a USB flash drive containing the GUI software, Windows SDK, Linux SDK, LabVIEW driver and digital version of the programming guide, along with a 6-ft. USB cable. The Lab Brick Digital RF Attenuator GUI is compatible with Microsoft Windows™ standard operating systems for personal computers. They are housed in rugged aluminum enclosures, each measuring 3.86 x 2.52 x 1.35 in. (98 x 54 x 34 mm) and weigh just 0.5 lb. (0.23 kg). All Lab Brick LDA Digital Attenuators are ROHS compliant. Lab Brick LDA Series Digital Attenuators


  • Automated Test Equipment (ATE)
  • WiMAX, 3G Fading Simulators
  • Engineering/Production Test Labs

Digital attenuators with up to 120 dB of programmable attenuation through 6,000 MHz

The LDA-102E and LDA-602E all have input power of up to 1 W. The LDA-102E offers frequency coverage of .1 – 1,000 MHZ while the LDA-602E model ranges from 400 – 6,000 MHz. Both units are powered and controlled by connection to a PC or self-powered USB hub, and are programmable for fixed attenuation or swept attenuation ramps directly from the included graphical user interface (GUI) software.

Easily programmable for ATE applications, the LDA Digital Attenuators can also be used in WiMAX, 3G, 4G, LTE, DVB Fading Simulators, and engineering and production test labs. Lab Brick LDA Series Digital Attenuators


Typical Specifications

Standard Models – 50 Ohm
LDA-102 6 to 1000 MHz
LDA-102E 10 to 1000 MHz
LDA-302P-H 10 to 3000 MHz
LDA-302P-1 10 to 3000 MHz
LDA-302P-2 10 to 3000 MHz
LDA-602 6 to 6000 MHz
LDA-602E 400 to 6000 MHz
LDA-203 1 to 20 GHz
Standard Models – 75 Ohm
LDA-102-75F 10 to 1000 MHz
Attenuation: Range Step Size
LDA-102 63 dB 0.5 dB
LDA-102-75F 95 dB 0.5 dB
LDA-102E 120 dB 0.5 dB
LDA-302P-H 31.5 dB 0.5 dB
LDA-302P-1 63 dB 1.0 dB
LDA-302P-2 90 dB 2.0 dB
LDA-602 63 dB 0.5 dB
LDA-602E 120 dB 0.5 dB
LDA-203 63 dB 0.5 dB
Input: Max Level2 Input IP3
LDA-102 +22 dBm +32 dBm
LDA-102-75F +30 dBm +52 dBm
LDA-102E +30 dBm +55 dBm
LDA-302P-X +33 dBm +68 dBm
LDA-602 +22 dBm +32 dBm
LDA-602E +30 dBm +55 dBm
LDA-203 +23 dBm 1-5 GHz: +48 dBm
1-20 GHz: +45 dBm
Insertion Loss: <1 GHZ 1-2 GHz 2-3 GHz 4-6 GHz
LDA-102 7 dB
LDA-102-75F 6 dB
LDA-102E 5 dB
LDA-302P-x 4.5 dB 5.5 dB 7.5 dB
LDA-602 7 dB 8 dB 9 dB 10 dB
LDA-602E 5.5 dB 6.5 dB 7.5 dB 9.5 dB
1-5 GHZ 5-10 GHz 10-15 GHz 15-20 GHz
LDA-203 -11 dB max -13 dB max -16 dB max -19 dB max
Attenuation Accuracy3
LDA-102, LDA-302, LDA-602 ± 0.5dB typ, ± 0.3 + 5% (3.5 dB max)
LDA-102E, LDA-102-75F, LDA-602E ± 0.5dB typ, ± 0.3 + 3% max
LDA-203 ± .75dB typ, ± 0.5 + 5%
Switching Speed
LDA-102 70 ns typ.
LDA-102-75F 1.5 us typ.
LDA-102E 4 us typ.
LDA-302P-X 2 us typ.
LDA-602 70 ns typ.
LDA-602E 4 us typ.
LDA-203 100 ns typ.
Input/Output VSWR 2.0:1 max, 1.3:1 typ.
DC Power 5V/65 mA
GUI Compatibility4 Windows 7/8/XP/2000/10
LDA-102, LDA-302, LDA-602 3.86″ x 2.52″ x 1.35″ (98 mm x 54 mm x 34 mm)
LDA-102E, LDA-203, LDA-602E 4″ x 2.5″ x .94″ (101.6 mm x 63.5 mm x 23.9 mm)
LDA-102, LDA-302, LDA-602 < 0.5 lbs (0.23 Kg)
LDA-102E, LDA-602E 0.6 lbs (0.27 Kg)
LDA-203 < 0.75 lbs (0.34 Kg)
RF Connectors
LDA-102, LDA-302, LDA-602 SMA-female or Type N-female
LDA-102E, LDA-203, LDA-602E SMA-female
LDA-102-75F Type F-female
USB Cable5
LDA-102, LDA-302, LDA-602 USB 2.0 A/miniB
LDA-102E, LDA – 203, LDA-602E USB 2.0 A/B
1These specifications are subject to change without notice.
2Exceeding the maximum input level may cause permanent damage.
3Customized models are available tailored to specific performance requirements.
4The GUI software is included with the purchase of each Lab Brick Digital Attenuator.
5A 6’ USB cable is included with the purchase of each Lab Brick Digital Attenuator.
Lab Brick LDA Series Digital Attenuators


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