LDA-608V-4 Lab Brick High Resolution Digital Attenuator®

200 – 8000 MHz Frequency | 60 dB Attenuation Range | 4 Channels | 0.1 Step SizeFeatures/Benefits▪ USB and Ethernet Control Interfaces▪ Reliable and Repeatable solid state digitalattenuation▪ Includes Windows GUI and SDK, macOSGUI and SDK, Linux SDK, LabVIEW driver,Python examples and more
▪ Configurable Static IP or DHCP
▪ Password protected Ethernet interface▪ Programmable attenuation ramp and fading
profiles▪ Operate multiple devices directly from a PCor self powered hub▪ Easily portable USB powered deviceApplications▪ Wi-Fi, Wi-Fi 6E, 3G, 4G, 5G, LTE,Microwave Radio Fading Simulators▪ Engineering/Production Test Labs
▪ Automated Test Equipment (ATE)

The Lab Brick LDA series of Digital Attenuators bring affordability, functionality, reliability, andsimplicity to the microwave test bench. The LDA products range from 6 MHz to 40 GHz with
input level tolerance to 2 Watts and step size as small as 0.1 dB.
The LDA-608V-4 offers both USB and Ethernet interfaces. The USB port uses a native HID
interface to avoid the difficulties inherent in using older serial or IEEE-488 interfaces
implemented over USB. As a result, Lab Brick users can get to work faster without having toinstall kernel level drivers, and Lab Brick devices can be easily used on any system thatsupports USB HID devices, including low-cost embedded computers using Linux or similar
operating systems. The Ethernet interface is configurable for Static IP or DHCP with the ability
to assign the HTTP port for extra security.
The LDA-608V-4 Digital Attenuator is a highly accurate, bidirectional, 50 Ohm step attenuatorwith 4 independently controlled attenuator paths. The LDA-608V-4 provides calibrated
attenuation from 200 to 8000 MHz with an amazing step size of 0.1 dB and typical accuracy<0.25 dB over 60 dB of control range. The attenuators are easily programmable for fixed
attenuation, swept attenuation ramps and fading profiles directly from the included Windows ormacOS Graphical User Interface (GUI). Alternatively, for users wishing to develop their owninterface, Vaunix supplies LabVIEW drivers, Windows API DLL files, macOS DYLIB files, Linuxdrivers, Python examples, and more.

7 New Pasture Road
Newburyport, MA 01950
978-662-7839
www.Vaunix.com
Revision A3 6/10/24

LDA-608V-4 Specifications

Parameter

Test Conditions

Min

Frequency Range (MHz)Typ2008000

Impedance (Ω)

50Channels

4Attenuation Range (dB)60

Step Size (dB)

0.1

Insertion Loss (dB)

Attenuation Accuracy (dB)Max

< 2 GHz

4.75

5.25

< 4 GHz

66.75< 8 GHz

7.25

8+25 °C

0.25

1.5-30 °C to +70 °C

13

Switching Speed (µs)

15

Maximum Input Level (dBm)

23

Input IP3 (dBm)

38

VSWR

45
1.5:1

Test Conditions/Notes

Parameter

Power Requirements

From the USB connection+5 VDC
75 mA

Operating Temperature-30 °C to +70 °C

Relative Humidity (non-condensing)<95%Power

USB Type C – female

Control

USB/Ethernet

RF Connectors

SMA – female

Environmental

Physical Connections

Operating Modes

Manual Attenuation Control
Swept Attenuation – uni/bi directional– one time/repeat
ProfileSize

6.88 x 2.105 x 0.785 inches
174.8 x 53.5 x 19.9 millimeters

Weight0.4 pounds
0.182 kilograms

Mechanical

7 New Pasture Road
Newburyport, MA 01950
978-662-7839
www.Vaunix.com
Revision A3 6/10/24

LDA-608V-4 Performance PlotsLDA-608V-4 Mechanical Outline

7 New Pasture Road
Newburyport, MA 01950
978-662-7839
www.Vaunix.com
Revision A3 6/10/24

LDA-608V-4 USB Software Interface

7 New Pasture Road
Newburyport, MA 01950
978-662-7839
www.Vaunix.com
Revision A3 6/10/24

LDA-608V-4 Ethernet Web Interface

7 New Pasture Road
Newburyport, MA 01950
978-662-7839
www.Vaunix.com
Revision A3 6/10/24