[RECOMMENDED] Best Rf Signal Generators for the Money

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An RF signal generator is without a doubt one of the most useful tools in any shack or home RF lab. It is required for receiver alignment as well as measuring receiver performance characteristics such as sensitivity, dynamic range, reciprocal mixing noise, and so on. A signal generator with a strong RF output (0 dBm or greater) can also be utilized as a test signal source for transmitter alignment and as a local oscillator for assessing mixer designs.

As a result, below is a list of the Best Rf Signal Generators.

Name Where To buy
  • B&K Precision 2005B RF Signal Generator, 150 MHz
  • SPA-6G Spectrum Analyzer and RF Explorer 6G Combo Bands. Handheld Frequency Analyzing for Ham Radio, Wireless Devices, WiFi Networks, Audio Engineers
  • RF Explorer Signal Generator Carrying Case Included – Frequency 24-6000 MHZ in The CW Area.
  • RF Explorer Signal Generator With Aluminium Case
  • SeeedStudio – RF Explorer Signal Generator RFE6GEN – Wideband Spectrum – DIY Maker Open Source BOOOLE
  • Koolertron Upgraded 60MHz DDS Signal Generator Counter,High Precision Dual-Channel Arbitrary Waveform Function Generator Frequency Meter 200MSa/s (60MHz)

Best Rf Signal Generators

B&K Precision 2005B RF Signal Generator, 150 MHz

Useful for the majority of Amplitude Modulation tasks. It does not support Frequency Modulation. Precision is preferable to accuracy.


The 2005B generates sine wave outputs at up to 100 mV at frequencies ranging from 100 kHz to 150 MHz (harmonics usable up to 450 MHz) (RMS).

The output can be amplitude modulated with an internal 1 kHz signal or an external audio signal with a maximum voltage of 1 V. (RMS). For more precise frequency control, an external crystal can be plugged in. A BNC female connector provides the output.

SPA-6G Spectrum Analyzer and RF Explorer 6G Combo Bands. Handheld Frequency Analyzing for Ham Radio, Wireless Devices, WiFi Networks, Audio Engineers.

My main goal was to find a portable analyzer that covered the core HAM bands and could be expanded. The WSUB1G+ was ideal for the job.

The resolution and accuracy of the analyzer are specified, and the unit appears to meet these requirements.

I chose this seller’s item because of the durable travel case. My initial application was to locate two sources of interference in the UHF band (particularly, a rural DTV signal), capture them, and address the problem. When a notebook computer is not available, the unit’s LCD is large enough to be used.

The user interface is a little awkward, but it’s not impossible to use. When used alone, my device tends to freeze, necessitating a power cycle and re-selection of your settings to continue. I need to speak with the seller about this issue. Will keep you updated on the status of the review as it progresses. Overall, I’m pleased with this product.

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RF Explorer Signal Generator Carrying Case Included – Frequency 24-6000 MHZ in The CW Area.

This thing performs admirably. When paired with the spectrum analyzer, this provides tracking generator capability, which is surprising given the low price. The buttons are too small for the casing, making it difficult to dial in settings.

Also, the harmonics are powerful, so if you are concerned, you may need to use a bandpass filter. At the highest power level, the fundamental is close to 0 dBm.

It would be ideal if the seller created a step-by-step list of instructions for each of the functions that this machine can perform.

The user interface appears to have been built for a different product (possibly in the same enclosure) and then forced to accomplish what the generator was supposed to do.

When I modify the function of frequency, it takes a lot of fiddling to get the unit to do what I want.

The amplitude accuracy (+/-0.2 dB) and frequency accuracy (+/-2 Hz at 915 MHz) are both rather good. The battery life is adequate, lasting at least several hours. A good price for a portable, battery-powered signal generator.

RF Explorer Signal Generator With Aluminium Case.

By selecting embedded menu options, the RF Signal Generator generates CW and Sweep signals. When linked to a PC, the RF Explorer for Windows software utility can be used to fully program it.

Furthermore, when used in conjunction with the SPA-6G Spectrum Analyzer linked to the same PC, the unit can function as a powerful Tracking Generator, providing complete Scalar Network Analyzer (SNA) capabilities. Filters, amplifiers, and any 2-port RF device can be fully characterized using the SNA function.


  • Lightweight and pocket-sized
  • Metal casing made of solid aluminum
  • Lifetime free firmware upgrades are provided, as well as access to community-requested additions.
  • Lipo battery with a capacity of 16 hours or more of continuous runtime, rechargeable through USB RF Explorer for Windows PC client Free and Open Source
  • Internal Expansion Modules can be added for future band support and functionality.
  • Broadband support
  • Supported frequency range: 24 to 6000 MHz
  • 1KHz frequency step/resolution
  • 0.5ppm frequency stability
  • Temperature control (0-45C)
  • Backlighting for improved indoor visibility
  • SMA 50 ohm connection standard
  • Amplitude programmable with inbuilt internal programmable attenuator:
  • 40dBm to -30dBm in 3dB increments
  • In 3dB increments, go from 10dBm to 0dBm.
  • Accuracy of amplitude: +-0.5dB (normalized) or +-3dB (absolute)
  • 10ms switch measurement point speed
  • Graphics LCD 128×64 pixels, excellent outdoor visibility
  • PC Windows client is compatible with both 32-bit and 64-bit versions of Windows XP/Vista/Win7.
  • Functional modes:
  • CW signal generator that can generate signals at any frequency in the range
  • The function of a tracking generator

Best Rf Signal Generator

SeeedStudio – RF Explorer Signal Generator RFE6GEN – Wideband Spectrum – DIY Maker Open Source BOOOLE

It does exactly what it says it does: it generates signals. I attempted to create a Frequency Tracking Generator using it and the RF Explorer Spectrum Analyzer to tune up some bandpass cavities. What a calamity.

It got me close, but it took a watt meter and a false load to get them to the peak. So, if you think these devices are a good substitute for an expensive service monitor, reconsider. There’s a reason why service monitors are so pricey.

These goods are cheap for a reason.

Koolertron Upgraded 60MHz DDS Signal Generator Counter,High Precision Dual-Channel Arbitrary Waveform Function Generator Frequency Meter 200MSa/s (60MHz)

I put it through a lot of testing, and it’s quite accurate. For the price, the company appears to make the best signal generators available. The controls are smooth and functional, the display is adequate, and it comes with clips.

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A handful of things to keep in mind:

  1. It’s extremely light. The board inside appears to be the same as the one used in their portable model: https://amazon.com/Koolertron-Precision-Generator-Dual-channel-Frequency/dp/B07597TJPC/ It works wonderfully, but it means the thing slides around a lot on a bench. That can be fixed by hot-gluing it down or placing some weight inside it.
  2. The rated frequency, as usual, only applies to the sine wave. The main difference between this and a higher-end piece of equipment is that the other (non-sine) forms degrade more / at lower frequencies with this. As a result, you couldn’t use the square wave as a harmonic generator to power UHF resonators or the like. But if you want to achieve that, you’ll need more specialist equipment, such as WindFreak’s.
  3. The maximum amplitude of 20V applies only up to a frequency of (IIRC) 10MHz, beyond which it is 10Vpp. Most generators have a starting voltage of 10V or 15V, so it’s wonderful that this one has a maximum voltage of 20V for much of the range.
  4. What truly impressed me was how exact their frequencies and impedance are. This device was well tested and calibrated. Simply said, this is a fantastic piece of equipment at an unbeatable price.

How Do You Use An Rf Signal Generator?

This is how to utilize a function generator to test the behavior of a circuit:

Turn on the generator and choose an output signal: square wave, sine wave, or triangle wave.

Connect the output leads to an oscilloscope to see the output signal and adjust its characteristics with the amplitude and frequency controls.

Connect the function generator’s output leads to the input of the circuit you want to test.

Connect the output of your circuit to a meter or oscilloscope to see the ensuing signal change.

A function generator, which is used to test the response of circuits to ordinary input signals, generates a variety of voltage patterns with varying frequencies and amplitudes. Connect the electrical leads of the function generator to the ground and the signal input terminals to the gadget under test (DUT).

The majority of function generators allow you to choose the shape of the output from several options, including square wave, which immediately goes from high to low voltage; sine wave, which curves from high to low voltage like a sinusoid; and triangle wave, which goes from high to low voltage at a fixed rate.

Advanced function generators, often known as arbitrary waveform generators, create any waveform that can be described by an amplitude table using direct digital synthesis techniques.

Some arbitrary waveform generators can also work as regular function generators, and they frequently include waveforms such as square, sine, ramp, triangle, noise, and pulse, as well as exponential rise and fall time, sinx/x, and cardiac.

The amplitude control of the function generator modifies the voltage difference between the high and low voltages of the output signal.

Its direct current (DC) offset control modifies the average voltage of the signal about the ground. The duty cycle of a function generator is its ratio of high to low voltage time when dealing with square wave signals.

The frequency control of the function generator is used to change the rate of oscillation of the output signal. The frequency control on some function generators combines three independent controls: one set of controls determines the frequency range, or order of magnitude, while the other picks the specific frequency.

This allows the function generator to accommodate the wide range of frequency scales required for signals.

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You use a function generator by turning it on and customizing the output signal to the shape you want. Connect the ground and signal leads to your oscilloscope to test the controls.

The function generator is then adjusted until the necessary signal is obtained, and the function generator’s ground and signal leads are connected to the device under the test’s input and ground terminals.

While connecting to the ground is usually enough, in rare cases, you may need to connect the function generator’s negative lead to the device’s negative input.

What Is An Rf Signal Generator Used For?

When toying with radio receivers, an RF signal generator is a must-have equipment. It’s used to fine-tune resonant circuits and alter the gain of various RF stages.

The modulation capability of the RF signal generator is a very helpful feature. It is a non-replaceable instrument for RF design work if it can vary the frequency amplitude or frequency.

Rf Signal Generator Vs Function Generator

What is the distinction between a Signal Generator and a Function Generator?

In this post, we will look at the fundamental difference between a signal and a function generator. But first, we should learn a little bit about these two. So, first and foremost, the fundamental definitions of Signal and Function generators are discussed.

Signals Generator

A signal generator is a type of electronic device (or piece of equipment) that produces repeating or non-repeating electronic signals (in either the analog or digital domains).

A signal generator is an essential piece of equipment for test setup, electronic development, and troubleshooting.

It is also used to test complex communication systems, measure the frequency response of amplifiers, and align radio receivers, among other things.

It is commonly utilized in the design, testing, and troubleshooting of electro-acoustic devices and circuits.

The complexity of waveforms produced by various types of electronic equipment spans from simple fixed frequency sinusoidal waves to those created by extremely sophisticated devices such as those required for testing complicated telecommunication circuits and networks.

Signal generators are classified into two types:

Signal generator for audio frequency (AF)

A radio frequency (RF) signal generator is a device that generates radio frequency (RF) signals.

There are several varieties of signal generators, but the following qualities are shared by all:

Harmonic content is low.

Consistent operating frequency

A constant amplitude of the output

Low spurious output, such as hum, noise, modulation, and so on.

Functions Generator

The function generator is a device that generates various waveforms such as sine waves, square waves, triangular waves, saw-tooth waves, and so on.

These waveforms’ frequency and amplitude can be changed across a wide range.

All waveforms are available at the same time.

Another valuable characteristic of the function generator is its ability to be phase-locked to an external signal source, allowing two output signals to be shifted out of phase by an adjustable amount.

Furthermore, one generator’s fundamental frequency can be phase-locked to a harmonic of another generator. The amount of any waveform can be generated by altering the amplitude and phase of the harmonic.

What is the difference between a Signal Generator and a Function Generator?

Signal Generator Function Generator
The signal generator generates only a Sine wave. Function Generator generates various waveforms like sine, square, sawtooth, triangular, etc.
Limited Frequency stability. High-Frequency Stability.
No capability of phase looking with the external source. The capability of phase-locking with the external source.
Frequency is controlled by frequency range
Frequency is controlled by varying the magnitude of the current which drives the integrator.


Author: Howard S. Baldwin

My name is Howard S. Baldwin. I am a work-at-home dad to three lovely girls, Jane + Hannah + Beauty. I have been blogging for the last 3 years. I worked for other Home and Lifetsyle blogs, did hundreds of product reviews and buyers’ guides. Prior to that, I was a staff accountant at a big accounting firm. Needless to say, researching and numbers are my passion. My goal is to be an informative source for any topic that relates to DIY life and homemaking.

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