Product Spotlight: Vaunix LPA-103V Programmable Gain Amplifier Puts 0.5–10 GHz Gain Control on Your Bench

RF test setups often need controlled gain changes. Engineers may need to condition a signal, evaluate receiver response, run a gain sweep, or repeat a defined test sequence. The challenge is managing these changes with enough precision to produce reliable results.

Vaunix addressed this need with the new LPA-103V Lab Brick Programmable Gain Amplifier, released in June 2026. The device provides programmable gain control across the 0.5–10 GHz frequency range. It offers up to 30 dB of gain control, with 0.1 dB step resolution and calibrated, repeatable accuracy better than 0.25 dB at room temperature.

For design engineers and RF test professionals, the LPA-103V supports a practical path from manual bench evaluation to automated test equipment integration.

CTM Marketing represents Vaunix in the Rocky Mountain Region, including Arizona, Colorado, Idaho, Montana, New Mexico, Utah, and Wyoming. As a local technical sales agency and component sales representative, CTM can help your team evaluate the LPA-103V for a specific test system or design-in requirement.

LPA-103V at a Glance

The LPA-103V combines wideband RF coverage with fine programmable gain control.

• Frequency range: 0.5–10 GHz

• Gain control range: Up to 30 dB

• Gain step resolution: 0.1 dB

• Calibrated accuracy: Better than 0.25 dB at room temperature

• Operating modes: Fixed gain, swept gain, and programmable gain sequences

• Control: USB using HID and Ethernet

• Driver requirement: No kernel drivers required

• Power options: PoE, USB-PD, or external DC

These capabilities make the amplifier useful in RF laboratories, engineering test benches, automated test equipment, and production test environments.

For complete electrical, mechanical, and operating details, review the official Vaunix LPA-103V product announcement and consult CTM or Vaunix for the full datasheet.

Why Programmable Gain Matters

A fixed-gain amplifier can be useful when a design requires one defined signal level. It becomes less flexible when the test plan requires multiple gain states.

Manual adjustments create several problems:

• Test conditions can vary from one run to the next.

• Operators must repeat the same setup changes.

• Sweeps take longer to configure.

• Production test fixtures may require additional switching hardware.

• Measurement data can become harder to compare.

The LPA-103V replaces these manual changes with software-controlled gain settings. A test engineer can select a fixed gain value, define a gain sweep, or load a custom gain sequence.

The 0.1 dB step resolution provides fine control for applications where small changes in signal level matter. The calibrated repeatable accuracy helps maintain consistent test conditions across repeated measurements at room temperature.

This does not eliminate the need for proper system calibration. Cable loss, connector condition, analyzer settings, temperature, and the full RF signal path still affect measurement results. However, programmable and repeatable gain control gives the test system a more consistent starting point.

Three Gain Modes for Three Test Needs

The LPA-103V supports three primary operating approaches. Select the mode that matches the test objective.

Fixed Gain

Use fixed gain when the test requires a stable, repeatable signal condition.

Examples include:

• Establishing a defined gain state for receiver testing

• Conditioning a signal before a measurement

• Repeating a reference test during troubleshooting

• Maintaining a consistent level during a design comparison

Fixed gain is also a practical starting point during early bench evaluation. Engineers can connect the amplifier, select a gain value, and begin testing without building an automation sequence.

Swept Gain

Use swept gain when the test requires a controlled ramp through multiple values.

A gain sweep can help characterize how a device responds as the input or conditioned signal changes. Depending on the test plan, the sweep may be used for:

• Receiver response evaluation

• Signal-conditioning studies

• Gain-dependent performance checks

• Automated RF characterization

A programmed sweep also makes the test easier to repeat. The same gain profile can be used during design revisions, verification testing, and regression testing.

Programmable Gain Sequences

Use programmable sequences when the test requires a custom series of gain states rather than a simple linear sweep.

For example, a sequence may move through selected gain values that represent defined test conditions. This can reduce unnecessary test points and align the amplifier’s behavior with the larger test procedure.

The result is a more deliberate test flow. Instead of manually adjusting gain and recording each condition, the software-controlled amplifier can follow the sequence defined by the engineer.

From Bench Instrument to ATE Subsystem

A major design-in benefit of the LPA-103V is its ability to serve both bench and automated test applications.

During early development, engineers may control the amplifier directly while validating a circuit, subsystem, or RF path. Later, the same type of gain-control function can be incorporated into an automated test platform.

This bench-to-ATE versatility can reduce the need to redesign the test approach as the project progresses. The gain-control method remains programmable while the surrounding system evolves.

Ethernet control supports installations where the amplifier is located inside a rack, test fixture, or remote setup. USB HID control provides another straightforward connection method for bench systems and embedded test platforms. Because the device does not require kernel drivers, integration can be simpler than systems that depend on specialized hardware drivers.

Power flexibility also supports different deployment models:

• Use USB-PD for compatible bench or embedded installations.

• Use PoE to combine power and network connectivity in Ethernet-based systems.

• Use an external DC supply when the test architecture calls for a dedicated power source.

Always confirm system-level power, interface, environmental, and integration requirements with the current Vaunix documentation before finalizing a design.

Practical Integration Guidance

Before selecting the LPA-103V for a design or test system, define the complete RF use case.

Start with the following questions:

Also review the full signal chain. RF cables, adapters, connectors, switches, filters, sources, receivers, and analyzers all contribute to system performance. The LPA-103V provides programmable gain control, but the complete measurement path determines the final result.

A Strong Fit for RF Design-In Work

The best time to evaluate a programmable gain amplifier is early in the design-in phase. Early technical review can help answer questions about architecture, control, power, automation, and future test requirements before they become costly changes.

The LPA-103V may be worth considering when your project needs:

• Wideband gain control from 0.5–10 GHz

• Fine 0.1 dB gain adjustments

• Repeatable test conditions

• Automated gain ramps or custom profiles

• USB and Ethernet control options

• Flexible power integration

• A test solution that can move from the bench into ATE

CTM supports this evaluation process locally. Our sales engineers work with engineering, purchasing, and manufacturing teams across the Rocky Mountain Region. We focus on understanding the application first, then matching the requirement with the appropriate engineered product.

CTM Marketing: Your Rocky Mountain Vaunix Representative

CTM Marketing is a design-driven manufacturers representative firm serving the Rocky Mountain Region. We represent Vaunix and provide technical sales support for RF and microwave test applications.

Our role goes beyond forwarding a product link. We help connect your requirements with the right product information, documentation, and manufacturer resources. That support can be valuable when you are comparing test architectures, planning a design-in, or preparing an automated test platform.

Read our previous overview of Vaunix Lab Brick solutions for wireless testing, or see how CTM approaches design-in support for engineered products.

Let’s Chat About Your RF Test Application

The Vaunix LPA-103V brings programmable gain control to a wide 0.5–10 GHz frequency range. Its fine resolution, repeatable accuracy, multiple gain modes, and USB or Ethernet control make it a practical option for both bench testing and ATE integration.

Need to evaluate the LPA-103V for a receiver test, signal-conditioning path, RF characterization setup, or production fixture?

Contact CTM Marketing for design support, application guidance, pricing, and current product documentation. You can also email sales@ctmrm.com or call 720-320-2932.

Let’s Chat! Give CTM the details of your frequency range, gain-control requirements, test workflow, and integration environment. We will help you take the next step with Vaunix.