UNI-T USG3045M | Professional RF Signal Generator (9 kHz to 4.5 GHz)

Overview

The UNI-T USG3045M RF signal generator delivers exceptional performance with frequencies from 9 kHz to 4.5 GHz, making it ideal for wireless communications, component testing, and research applications. Featuring high signal purity, precise level control, and comprehensive modulation capabilities, this instrument provides the reliability and accuracy that RF professionals demand in today's challenging testing environments.

Engineered for professional testing needs, the USG3045M combines advanced RF signal generation capabilities with an intuitive user interface and versatile connectivity options. The exceptional signal quality with low phase noise (<-122 dBc/Hz @ 1 GHz, 20 kHz offset) ensures accurate measurements for critical applications. Whether you're working in wireless communications, educational environments, production testing, or RF development, the USG3045M provides the measurement accuracy, modulation capabilities, and ease of operation needed to solve your most challenging RF testing requirements.

USG3000M RF Signal Generator with professional-grade performance

Key Features

• Broad Frequency Coverage - Generates signals from 9 kHz to 4.5 GHz with ultra-fine 0.001 Hz resolution for precise testing
• Wide Output Range - Adjustable output levels from -135 dBm to +20 dBm to meet diverse testing requirements
• Superior Signal Quality - Low phase noise (<-122 dBc/Hz @ 1 GHz, 20 kHz offset) ensures accurate measurements
• Versatile Modulation - AM, FM, and ΦM capabilities with internal, external, or combined modulation sources
• Intuitive Operation - 5-inch capacitive touch screen with clear visual feedback and logical menu organization
• Flexible Connectivity - Remote control via LAN and USB interfaces for automated testing environments
• Integrated Function Generator - Built-in 50 MHz function/arbitrary waveform generator adds versatility
• Electronic Attenuator - Provides reliable output level control with 0.01 dB resolution
• Mechanical Attenuator - Enhanced output power and superior level stability (-P Model Only)
• Comprehensive Sweep Capabilities - Frequency, amplitude, and list sweep modes with customizable parameters
• Advanced Pulse Modulation - Optional pulse modulation with on-off ratios up to 80 dB (USG3000M-PM)
• Narrow Pulse Generator - Optional pulses as narrow as 20 ns with 10 ns resolution (USG3000M-PG)

High Performance Signal Generation

The USG3045M delivers precision RF signal generation with exceptional purity across its full frequency range. With phase noise performance of <-122 dBc/Hz at 1 GHz (20 kHz offset), the signal generator provides the clean signal sources necessary for accurate component characterization and receiver testing. The high-performance RF architecture ensures superior harmonic suppression (≤ -50 dBc from 10 MHz to 1 GHz), enabling confident measurements without interference from unwanted signal components.

The outstanding frequency resolution of 0.001 Hz allows for ultra-precise frequency setting, essential for applications requiring exact signal frequencies. Combined with amplitude accuracy of ≤ 0.7 dB (typical), the instrument ensures your test signals meet exact specifications. This exceptional performance makes the USG3045M ideal for applications ranging from cellular component testing to aerospace and defense verification, where signal quality directly impacts measurement validity.

Low phase noise performance ensures high signal purity for precision measurements

Comprehensive Modulation Capabilities

The USG3045M provides versatile modulation capabilities essential for thorough communications system testing. Standard analog modulation includes AM with depths up to 99%, FM with deviation up to 10 MHz, and phase modulation up to 5 radians. The flexible modulation sources allow for internal, external, or combined operation, adapting to diverse testing scenarios. Each modulation type features precise control of parameters, enabling accurate simulation of real-world signal conditions.

For applications requiring pulsed RF signals, the optional USG3000M-PM pulse modulation capability delivers outstanding on-off ratios up to 80 dB with fast rise/fall times below 20 ns. The pulse modulation can operate in various modes including free-running, triggered, gated, and customized pulse train patterns. When combined with the optional USG3000M-PG narrow pulse generator, the system can generate pulses as narrow as 20 ns with 10 ns resolution, perfect for radar system testing and pulse characterization applications.

Comprehensive analog modulation capabilities include AM, FM, and ΦM with various modulation sources

High-precision Pulse Generator

USG3000M series features a stable clock source and offers optional pulse modulation and a narrow pulse generator. The USG3000M-PG option delivers a minimum pulse width of 20 ns with a resolution of 10 ns, meeting the requirements of automotive millimeter-wave radar systems and advanced timing applications. The pulse generator provides exceptional timing precision and stability across multiple operating modes.

With the optional pulse modulation package, you can generate customized pulse trains with precisely controlled timing parameters. Multiple pulse modes are supported, including Free-Run, Square, External Triggered, Adjustable Doublet, External Trigger Doublet, Gated, External Pulse, and Pulse Train. The outstanding on-off ratio of ≥ 80 dB ensures clear signal transitions with minimal bleed-through, while fast rise/fall times below 20 ns enable accurate simulation of high-speed pulsed systems. These capabilities are essential for radar system testing, pulse characterization, and advanced communications applications.

High-precision pulse generator with minimum pulse width of 20 ns and 10 ns resolution

Advanced Sweep Functions

The USG3045M features comprehensive sweep capabilities that simplify component characterization and system response testing. The instrument supports frequency, amplitude, and list sweep modes with customizable step sizes and dwell times. Engineers can perform frequency sweeps across the full 9 kHz to 4.5 GHz range with linear or logarithmic step patterns, enabling efficient measurement of frequency-dependent parameters like filter responses or amplifier gain flatness.

For more complex testing requirements, the list sweep mode allows creation of custom frequency-amplitude point sequences, ideal for focused testing at specific frequencies of interest. Sweep operation can be triggered via multiple methods including free-running, external trigger, manual key press, or computer command, providing flexibility for both manual testing and automated sequences. These advanced sweep functions streamline the characterization process and reduce overall test time compared to point-by-point manual measurements.

Comprehensive sweep modes including frequency, amplitude, and list sweep with customizable parameters

Intuitive User Interface

The USG3045M features a 5-inch capacitive multi-touch screen with an intuitive user interface that accelerates test setup and enhances productivity. The flat design with clear parameter organization allows for quick access to commonly used functions, while the logical menu structure ensures even complex operations can be performed with minimal keystrokes. The touch interface supports gestures for common operations, reducing setup time and allowing engineers to focus on test results rather than instrument configuration.

Visual feedback is provided through clear waveform displays for both output and modulating signals, enabling immediate verification of signal characteristics. The interface allows seamless switching between time-domain and frequency-domain views, providing comprehensive signal visualization. Numerical parameters are displayed with high visibility and logical grouping, ensuring settings are easily verifiable at a glance. This thoughtful interface design reduces learning curves and improves testing efficiency in both research and production environments.

5-inch capacitive multi-touch screen with intuitive, flat design interface for efficient operation

Integrated Function Generator

The USG3045M includes a built-in 50 MHz function/arbitrary waveform generator that extends the instrument's versatility beyond RF applications. This integrated LF generator produces high-quality sine waves up to 50 MHz, square and pulse waveforms up to 15 MHz, and triangular waves up to 3 MHz. With output amplitude adjustable from 1 mVpp to 2 Vpp and DC offset control, it provides the signal flexibility needed for various testing applications without requiring additional equipment.

The function generator includes advanced capabilities such as linear and logarithmic sweep functions and comprehensive modulation options including AM, FM, and pulse modulation. For digital communications testing, it supports ASK, FSK, PSK, and QAM modulation with various digital patterns. This integration delivers significant value by combining two essential instruments in one compact unit, saving both bench space and equipment costs while maintaining signal generation quality.

Integrated 50 MHz function/arbitrary waveform generator with comprehensive waveform and modulation capabilities

Optional Power Meter Option

The optional USG3000M-PK power meter option transforms the USG3045M into a comprehensive RF test solution by adding accurate power measurement capabilities. Connected through the front panel USB port, this accessory enables precise RF power measurements, particularly valuable for calibrating output power levels and verifying signal integrity at the device under test. The power measurement system allows direct verification of actual received power, eliminating uncertainty in test setups.

A key capability of the power meter option is the line loss calibration function, which automatically compensates for cable and fixture losses in the test path. This ensures that the power level reaching the device under test matches the specified value, improving measurement accuracy and test consistency. By combining signal generation and power measurement in a single coordinated system, the power meter option streamlines test procedures and reduces the need for additional test equipment, providing significant value for RF development and production test applications.

Optional power meter option provides power measurement, output control, and line loss calibration capabilities

Professional Applications

Wireless Communications

The USG3045M's precise frequency control, low phase noise, and comprehensive modulation capabilities make it ideal for testing wireless communication systems and components. Engineers can generate the clean signals needed for receiver sensitivity testing, while the modulation functions enable simulation of real-world transmission conditions. The instrument's frequency range covers key wireless bands including cellular, Wi-Fi, Bluetooth, and IoT standards, providing the versatility required for modern communications development. Whether characterizing RF components like filters and amplifiers or testing complete receiver systems, the USG3045M delivers the signal quality and flexibility needed for accurate wireless communications measurements.

Educational and Research Facilities

For educational and research applications, the USG3045M provides the comprehensive functionality needed to support diverse learning and experimental scenarios. The intuitive interface with clear visual feedback simplifies operation for students, while the professional-grade specifications ensure accurate results for serious research. The integrated function generator and optional pulse capabilities expand the instrument's utility across multiple laboratory applications, from basic RF principles to advanced communications theory. The USG3045M's affordability combined with its feature set makes it an excellent choice for equipping educational laboratories where budgets are constrained but performance requirements remain high.

Production Testing

In production environments, the USG3045M's automation capabilities and signal stability make it an excellent choice for quality assurance and validation testing. The comprehensive remote control options via LAN, USB, or optional GPIB support seamless integration into automated test systems. Fast frequency and amplitude switching speeds minimize test time, increasing throughput in high-volume manufacturing applications. When equipped with the optional power meter option, the system provides closed-loop verification of RF parameters, ensuring consistent test conditions across production batches. These capabilities make the USG3045M particularly valuable for manufacturing tests of RF modules, wireless devices, and communication equipment.

General RF Development

RF engineers developing filters, amplifiers, mixers, and other components rely on the USG3045M's signal quality and measurement capabilities to characterize device performance. The low phase noise and harmonic content ensure measurements reflect true device characteristics rather than signal generator artifacts. Sweep functions streamline frequency response measurements, while the optional power meter option provides immediate verification of gain or loss figures. The instrument's comprehensive frequency coverage from 9 kHz to 4.5 GHz encompasses most standard RF development applications, making it a versatile tool for general RF engineering tasks from initial prototyping through final validation.

Technical Specifications

Parameter	Specification
Frequency Range	9 kHz to 4.5 GHz
Frequency Resolution	0.001 Hz
Phase Offset	Step of 0.1°
Output Level Range	-135 dBm to +20 dBm
Amplitude Accuracy	≤ 0.7 dB (typical)
Phase Noise	<-122 dBc/Hz @ 1 GHz, 20 kHz offset (typical)
Harmonics	≤ -50 dBc (10 MHz to 1 GHz), ≤ -40 dBc (1 GHz to 4.5 GHz)
Modulation Types	AM, FM, ΦM (standard); Pulse (optional)
Display	5-inch capacitive multi-touch screen (800×480)
Connectivity	LAN (10/100/1000 Base, RJ-45), USB Device, USB Host
Optional Interfaces	GPIB (IEEE-488.2)
Power Supply	100 to 240 VAC, 50/60 Hz, <50 W
Dimensions (H×W×L)	426mm × 88mm × 400mm
Weight	<20 kg
Calibration Period	One year

USG3000M Series Model Comparison

The USG3000M series offers multiple models to address specific RF testing requirements. The series includes models with different frequency ranges and output power capabilities, allowing you to select the instrument that best meets your application needs and budget constraints.

Model Variants and Key Differences

The USG3000M series includes four main models. The USG3045M and USG3045M-P cover frequencies up to 4.5 GHz, while the USG3065M and USG3065M-P extend coverage to 6.5 GHz. The "-P" designation indicates models equipped with a mechanical attenuator, which provides higher maximum output power and improved level stability for applications requiring stronger signals.

Feature	USG3045M	USG3045M-P	USG3065M	USG3065M-P
Frequency Range	9 kHz to 4.5 GHz	9 kHz to 4.5 GHz	9 kHz to 6.5 GHz	9 kHz to 6.5 GHz
Mechanical Attenuator	No	Yes	No	Yes
Maximum Output Power (250 MHz to 1.2 GHz)	+20 dBm	+24 dBm	+20 dBm	+24 dBm
Maximum Output Power (1.2 GHz to 3.6 GHz)	+18 dBm	+22 dBm	+18 dBm	+22 dBm
Maximum Output Power (3.6 GHz to 4.5/6.5 GHz)	+15 dBm	+20 dBm	+15 dBm	+20 dBm
SSB Phase Noise at 1 GHz, 20 kHz offset (Typ.)	-122 dBc/Hz	-122 dBc/Hz	-122 dBc/Hz	-122 dBc/Hz
Step Attenuator	Electronic (0 to 110 dB)	Mechanical (0 to 110 dB)	Electronic (0 to 110 dB)	Mechanical (0 to 110 dB)
SWR (1.0 GHz to Max. Freq.)	< 1.8:1	< 1.6:1	< 1.8:1	< 1.6:1

Standard Features Across All Models

All USG3000M series models share a common set of core capabilities that ensure professional-grade performance regardless of which variant you select:

• 0.001 Hz frequency resolution
• Automatic Level Control (ALC) with multiple operating modes
• Standard AM, FM, and ΦM modulation
• 5-inch capacitive multi-touch display
• Built-in 50 MHz function/arbitrary waveform generator
• LAN and USB connectivity
• Step, list, and sweep functionality
• Low phase noise and high signal purity

Selecting the Right Model

When choosing between USG3000M series models, consider these factors to determine which variant best meets your requirements:

Frequency Requirements

If your applications only require signals up to 4.5 GHz, the USG3045M models offer excellent value. For higher frequency applications including 5 GHz Wi-Fi bands, 5G sub-6 GHz testing, or other systems operating between 4.5 and 6.5 GHz, select the USG3065M models.

Output Power Needs

The "-P" models with mechanical attenuators provide up to 4 dB more output power, making them ideal for:

• Testing high-attenuation systems
• Driving power amplifiers
• Compensating for lossy test setups
• Applications requiring stronger signals

The standard models with electronic attenuators offer excellent performance for most general-purpose applications at a more economical price point.

Common Options for All Models

All USG3000M series models support the same set of optional capabilities:

• USG3000M-PM: Pulse modulation with 80 dB on-off ratio
• USG3000M-PG: Narrow pulse generator (20 ns minimum width)
• USG3000M-PK: Power meter option
• USG3000M-GPIB: GPIB interface for legacy systems

Application-Specific Recommendations

Wireless Communications Testing

For 2.4 GHz applications (Wi-Fi, Bluetooth, ZigBee), the USG3045M provides complete coverage. For 5 GHz Wi-Fi and similar bands, choose the USG3065M. If you're testing receivers through lossy fixtures or conducting sensitivity measurements that require stronger signals, select a "-P" model.

Educational and Research

For university labs and educational settings, the USG3045M offers the best value for most RF teaching applications. The USG3065M should be considered when training involves 5 GHz wireless systems.

Radar and Pulse Applications

If your work involves radar systems or precise pulse generation, any model can be equipped with the USG3000M-PM and USG3000M-PG options. The "-P" models are recommended if higher power pulses are required, as they provide 4-5 dB more output power at higher frequencies.

Production Testing

For automated test systems, all models offer similar remote control capabilities. Select the model that matches your frequency and power requirements. Adding the USG3000M-PK power meter option is recommended for production environments to enable closed-loop verification of power levels.

Cost-Benefit Considerations

The USG3000M series is designed to provide optimal price-performance ratios across the range of models:

• USG3045M: Best value for applications below 4.5 GHz with standard power requirements
• USG3045M-P: Optimal for applications below 4.5 GHz requiring higher output power
• USG3065M: Most economical solution for applications requiring frequencies up to 6.5 GHz
• USG3065M-P: Premium solution with maximum frequency range and output power

Each model delivers professional-grade performance, with the primary differences being frequency range and output power capabilities.

Available Options and Accessories

Item	Description	Order No.
Pulse Modulation	Enables pulse modulation capability	USG3000M-PM
Narrow Pulse Generator	Adds narrow pulse generation functionality	USG3000M-PG
Power Meter option	Provides power measurement and calibration	USG3000M-PK
GPIB Interface	Adds GPIB connectivity for legacy systems	USG3000M-GPIB
RF Cable	SMAJ-NJ-0.7M DC-6G cord	UT-W02-6GHz
RF Cable	NJ-NJ-0.7M DC-6G cord	UT-W01-6GHz
Adapter	SMA-N-KJ-T DC-6GHz	UT-C01-6GHz
Adapter	N-BNC-JK DC-4GHz	UT-C02-4GHz
Accessories Pouch	Carrying case for accessories	UT-CK01

Advanced Pulse Modulation Cap