Shopping Cart

Your cart is empty.

Your cart is empty.

Koolertron DDS Signal Generator Counter, 2' Screen Display 25MHz High Precision Dual-Channel Arbitray Waveform Generator Frequency Meter 200MSa/s

Free shipping on orders over $29.99

$96.99

$ 43 .99 $43.99

In Stock

1.Size:30mhz


  • Arbitray Waveform Generator adopts large scale FPGA integrated circuit and high speed MCU microprocessor. The internal circuit adopts active crystal oscillator as benchmark. So the signal stability is greatly strengthened.
  • Using Dual-channel DDS signal and TTL electric level output to generate precise, stable, low distortion output signal. includes Sine wave, Square wave, Triangle wave, Saw tooth wave, TTL, user-defined waveform etc. each channel can be independently set the parameters.
  • With linear sweep(Max. up to 999.9s) and logarithmic frequency sweep functions.Has a frequency measurement, period measurement, positive and negative pulse width measurement and counting function.
  • Storage feature: You can store 10 groups instrument state parameters set by the user, can be called up to Reproduce. Frequency output of Sine wave can be up to 25MHz. 200MSa/s sampling rate. It has 16 positions for saving user-defined waveform. Waveform Length of each one is 2048 and vertical resolution is 12 bits
  • This instrument signal generation, waveform scanning, as well as the use of parameter measurement has great advantages, is an electronic engineer, electronic laboratories, production lines and teaching, research and the ideal test, measurement equipment.


Instrument Characteristics:

1、Direct digital synthesis (DDS) technology, FPGA design, low power consumption;

2、Dual output, can work in sync phase adjustable;

3、It has up to 999 seconds of linear and logarithmic sweep function Sweep;

4、With a sine wave, triangle wave, square wave, sawtooth rise, falling sawtooth waveform basic function and variable duty cycle pulse wave, but also has 16 sets of arbitrary waveform customized by the user;

5、A total of 10 sets of parameters stored bits have M0 ~ M9, M0 boot automatically transferred out of data;

6、At 12MHz or less, the sharpest of up to 20Vp-p, more than 12MHz, the biggest reach 15Vp-p;

7、Built precision -20dB attenuator reach the minimum amplitude resolution 1mV;

8、With a 120% ~ + 120% DC bias function;

9、Pulse Duty precise adjustment to 0.1%;

10、Having four variable phase difference of TTL output;

11、Having a frequency measurement, period measurement, positive and negative pulse width measurement, duty cycle measurements and counting function;

12、Four optional gate frequency measurement time, which strike a balance between speed and accuracy;

13、All parametric equalizer can be done by an internal calibration procedure;

14、Powerful communications features, completely open communication protocol that allows the secondary development of very simple;

15、After connecting with the PC, the PC can be used to control the instrument, and can be edited on the PC arbitrary waveform output waveform is downloaded to the instrument.

16、This type machine can be equipped with an increase in power module, the signal output amplitude reaches 30Vpp, the maximum output current reaches 1A

Technical indicators:

Output modulation: Frequency sweep

Waveform types: Sine, square, triangle, sawtooth lift, TTL digital signal wave, Arb

Waveform Length: 2048 Point

Sampling rate: 200MSa/s

Waveform amplitude resolution: 12 bits

The minimum frequency resolution: 10mHz

Frequency error: ±5×10-6

Frequency stability: ±1×10-6

Amplitude range (peak to peak): 5mVp-p~20Vp-p(12MHz or less)

5mVp-p~15Vp-p(12MHz above):

Output Impedance: 50Ω±10%

Amplitude resolution: 1mVp-p(-20dBAttenuation)

10mVp-p(Does not decay)

Amplitude stability: ±0.5%(Every five hours)

Amplitude error: ± 1%+10mV(Frequency1KHz,15 Vp-p)

Offset Range: -120%~+120%(The ratio of the bias voltage and signal amplitude)

Bias Resolution: 1%

Phase range: 0~359°

Phase resolution: 1°

Sine wave:

Harmonic arrived System: 40dBc(

Distortion

Square wave:

Lifting along time≤20ns

Overshoot ≤10%

Duty cycle adjustment range: 0%~99.9%

TTL:

Lifting along time ≤20ns

LOW

High: 1V~10V

Arbitrary Waveform:

Quantity: 16 groups

Memory depth / group: 1KB / 16 group

Scan:

Scan Mode: Linear sweep, log sweep

Scan time: 1S~999S

Scan range: It is determined by the sweep parameter settings

Input voltage range: 0.5Vp-p~20Vp-p

Counting range: 0~4294967295

Counting: Manually

Positive and negative pulse width measurement: 10ns resolution, the maximum measurable: 10s

Periodic measurements: 20ns resolution, the maximum measurable: 20s

Duty Cycle Measurement: 0.1% resolution, measuring range from 0.1% to 99.9%

Source Selection: 1.Ext.IN input (AC signal), 2.TTL_IN input (digital signal)

Memory:

Memory: 10

Location: M0-M9

Interface:

Interface: Using USB to serial interfaces

Communication rate: 57600bps

Protocol Using the command line, the agreement public

DC : DC 5V

Length × width × height: 180×190×71mm

Package includes:

1* Signal Generator

1* Power Adapter

1* USB cable

2* Signal connection cable

1* User Manual

1* Optical disc


MakerMan
2025-08-27 11:02:47
I tested pretty extensively, and it's impressively accurate. For the price, the company seems to make the best signal generators you can get by a mile. Controls are smooth and functional, display is fine, and comes with clips.A couple things to note:1. It's super light. The board inside looks to be the same board used with their portable model: https://amazon.com/Koolertron-Precision-Generator-Dual-channel-Frequency/dp/B07597TJPC/ Works great, but means that the thing slides around on a bench very easily. Hot gluing it down or securing some weight inside it fixes that.2. As usual, the rated frequency only applies to the sine wave. The biggest difference between this and a higher end piece of kit is that with this, the other (non-sine) forms degrade more / at lower frequencies. So you couldn't use the square wave, for example, as a harmonic generator for driving UHF resonators or the like. But if you want to do that, you'll have more specialized equipment anyway - something like WindFreak's stuff.3. The max amplitude of 20V only applies up to a frequency of (IIRC) 10MHz - after that it's 10Vpp. Most generators limit to 10V or maybe 15V from the start, so it's nice that this does 20 for much of the range.4. What really impressed me is that they have the frequencies and impedance as accurate as they do. They clearly tested and calibrated this thing thoroughly. Just a great piece of equipment at a killer price.
WM5E
2025-08-17 13:24:42
This is a great audio generator for the money. It's stable, has a clean output, tons of features and it's really easy to use. The screen is well lit, and it only takes a short time to learn the UI. I work on audio gear, and it's got everything that I need. The stability is good enough for my wow/flutter test, and the multifrequency waveform is perfect to troubleshoot filters. Everything works like it should. The only negative would be the thing is so light, you have to have a hand on top when you push a button or you'll push it off the shelf. Tie it down some way, or just learn to hold it while you use the buttons. I'm very happy with mine.
Barry Watson
2025-07-20 18:36:46
I’m impressed by the capabilities of this signal generator. Not long ago, a device like this would have been prohibitively expensive. The unit is compact and lightweight yet performs exceptionally well, making it a great addition to any test bench. While I’m very satisfied with its functionality, there are a few design elements that could be refined.The display and menus, although in English, retain some stylistic influences from the original Chinese design. This has no impact on usability but may feel slightly unconventional to some users. Setting the operating frequency is straightforward, though the process is a bit unconventional—you select a specific decimal position and adjust the value with the control knob.One minor inconvenience is that while the unit offers plenty of memory slots for saving operational states, it always starts up with its default settings rather than remembering the last frequency and mode used. It would be much more user-friendly if it resumed the previous operational state upon powering on.That said, these quirks are minor and don’t detract from the unit’s overall performance. While it’s not reference-grade test equipment—understandable at this price point—it is an extremely capable and excellent value for general-purpose use.
Klaus Ziegler
2025-06-27 14:01:39
This is a very nice, compact and very easy to use signal generator. It is very precise. Excellent performance when I compare it with my other generators. Besides, its price is much lower than other equipment.Shipment was fast!I recommend it 100%
Sol & Ollie
2025-06-07 16:59:49
Edited review: regarding the duty, I realized that there was specifically a pulse wave which is affected, and that the square wave is not. This was confusing since duty is selectable for all waves, but it does work. I also took this into the lab today and compared it to lab quality generators. I’m creating very low voltage, low frequency signals on this thing (10 Hz at 0.1V) and attenuating it down to about 200uV. This thing is a beast and does that no problem, even slightly better than some of the lab grade equipment we have. Do your own tests, but for my purposes this exceeds my expectations. I still have not tried creating software defined arbitrary waves, but if that works reliably I’d give this 6 stars if it was possible.Original Review: I’m using this for very low frequency, low voltage stuff (10Hz @ 0.1V) and it does a pretty good and reliable job. So far the only thing that doesn’t work is the duty. Adjusting it still results in a fully symmetrical wave. I also haven’t tried uploading arbitrary waveforms yet, but watched a YouTube video that tracked down the required software and it seemed a bit annoying to set up. So far it’s been a productive instrument, but unfortunate that I didn’t get a feature I paid for.
thorrk
2025-06-05 17:50:22
The default oscillator inside of this is a YXC 50.000 XO (possibly a OT2ED8K5JI-111YXC-50M). This oscillator doesn't suck, but it only has 10-20 ppm of precision and lacks temperature compensation.On my unit, I replaced its default oscillator with a Jaunch TXCO (model: O 50,0-JT32CT-A-K-3,3-LF) which costs about $5 on DigiKey, and has 2.5ppm precision plus temperature compensation :)Following this, a subsequent recalibration adjustment to the 'Freq. Fine Tuning' option in the 'System Setup' menu has allowed me to get a stable and low-ish jitter signal regardless of output frequency.
Clayton
2025-06-02 18:35:48
It’s quite easy to use and very lightweight.Is it lab quality accurate? Probably not. It is good enough for my day-to-day use testing circuits.I would recommend it if your thing is simple development or repair.
Guy Bisson
2025-05-18 11:22:49
The generator was ok and after a few days the chanel 1 stop working.A few mail with support to explain my problem, and to do the tests they asked of me, they send a replacement main board.The new board was the good way to correct the problem.Work fine now.
Joani F.
2025-04-11 10:29:44
Arrived on time and in good condition. Has amazing capabilities just what my husband needed for some lab work with his university courses
Bruce M. Walker
2025-04-10 13:52:31
I bought this signal generator to replace my very old (1970's) Heathkit instrument. I needed to repair some older hi-fi gear that I wanted to put back into service. I had earlier acquired a modern digital oscilloscope to use with it [Hantek DSO5102P].This signal generator is pretty amazing. I really just needed square waves and sine waves in the audio range (20Hz - 20KHz) for my work, but I figured it wouldn't hurt to have more capability and I did spend some time trying the extra functionality out. The unit is light, but that didn't cause me any problems. It's very compact which is perfect for my tight work space.I did find the arrow-key method for adjusting the output frequency to be a bit un-obvious and slightly annoying, but I can get used to it. (To be honest, I prefer the big sweep knob on the old Heathkit generator.)But I cannot complain about the quality of the output signals generated or the amazing range of features it has. I will be able to use this device for all sorts of design and troubleshooting in future.
David
2025-04-09 17:46:08
It's extremely light, I assume the case is mostly empty space, with a small circuit board mounted on the front of the case.The on/off button on mine is a little dodgy, it takes a very precise push to turn the device on, but there merest whisper of a touch to turn it off. But I can live with it.With the device feeling so light, I feel it’s a little overpriced, but it does work well, and the UI is pretty intuitive.
MakerMan
2025-03-15 18:26:52
I tested pretty extensively, and it's impressively accurate. For the price, the company seems to make the best signal generators you can get by a mile. Controls are smooth and functional, display is fine, and comes with clips.A couple things to note:1. It's super light. The board inside looks to be the same board used with their portable model: https://amazon.com/Koolertron-Precision-Generator-Dual-channel-Frequency/dp/B07597TJPC/ Works great, but means that the thing slides around on a bench very easily. Hot gluing it down or securing some weight inside it fixes that.2. As usual, the rated frequency only applies to the sine wave. The biggest difference between this and a higher end piece of kit is that with this, the other (non-sine) forms degrade more / at lower frequencies. So you couldn't use the square wave, for example, as a harmonic generator for driving UHF resonators or the like. But if you want to do that, you'll have more specialized equipment anyway - something like WindFreak's stuff.3. The max amplitude of 20V only applies up to a frequency of (IIRC) 10MHz - after that it's 10Vpp. Most generators limit to 10V or maybe 15V from the start, so it's nice that this does 20 for much of the range.4. What really impressed me is that they have the frequencies and impedance as accurate as they do. They clearly tested and calibrated this thing thoroughly. Just a great piece of equipment at a killer price.
WM5E
2025-03-11 17:44:00
This is a great audio generator for the money. It's stable, has a clean output, tons of features and it's really easy to use. The screen is well lit, and it only takes a short time to learn the UI. I work on audio gear, and it's got everything that I need. The stability is good enough for my wow/flutter test, and the multifrequency waveform is perfect to troubleshoot filters. Everything works like it should. The only negative would be the thing is so light, you have to have a hand on top when you push a button or you'll push it off the shelf. Tie it down some way, or just learn to hold it while you use the buttons. I'm very happy with mine.
Barry Watson
2025-02-18 15:25:15
I’m impressed by the capabilities of this signal generator. Not long ago, a device like this would have been prohibitively expensive. The unit is compact and lightweight yet performs exceptionally well, making it a great addition to any test bench. While I’m very satisfied with its functionality, there are a few design elements that could be refined.The display and menus, although in English, retain some stylistic influences from the original Chinese design. This has no impact on usability but may feel slightly unconventional to some users. Setting the operating frequency is straightforward, though the process is a bit unconventional—you select a specific decimal position and adjust the value with the control knob.One minor inconvenience is that while the unit offers plenty of memory slots for saving operational states, it always starts up with its default settings rather than remembering the last frequency and mode used. It would be much more user-friendly if it resumed the previous operational state upon powering on.That said, these quirks are minor and don’t detract from the unit’s overall performance. While it’s not reference-grade test equipment—understandable at this price point—it is an extremely capable and excellent value for general-purpose use.
Klaus Ziegler
2025-01-31 11:50:12
This is a very nice, compact and very easy to use signal generator. It is very precise. Excellent performance when I compare it with my other generators. Besides, its price is much lower than other equipment.Shipment was fast!I recommend it 100%
Sol & Ollie
2025-01-13 17:45:08
Edited review: regarding the duty, I realized that there was specifically a pulse wave which is affected, and that the square wave is not. This was confusing since duty is selectable for all waves, but it does work. I also took this into the lab today and compared it to lab quality generators. I’m creating very low voltage, low frequency signals on this thing (10 Hz at 0.1V) and attenuating it down to about 200uV. This thing is a beast and does that no problem, even slightly better than some of the lab grade equipment we have. Do your own tests, but for my purposes this exceeds my expectations. I still have not tried creating software defined arbitrary waves, but if that works reliably I’d give this 6 stars if it was possible.Original Review: I’m using this for very low frequency, low voltage stuff (10Hz @ 0.1V) and it does a pretty good and reliable job. So far the only thing that doesn’t work is the duty. Adjusting it still results in a fully symmetrical wave. I also haven’t tried uploading arbitrary waveforms yet, but watched a YouTube video that tracked down the required software and it seemed a bit annoying to set up. So far it’s been a productive instrument, but unfortunate that I didn’t get a feature I paid for.
thorrk
2025-01-11 10:28:26
The default oscillator inside of this is a YXC 50.000 XO (possibly a OT2ED8K5JI-111YXC-50M). This oscillator doesn't suck, but it only has 10-20 ppm of precision and lacks temperature compensation.On my unit, I replaced its default oscillator with a Jaunch TXCO (model: O 50,0-JT32CT-A-K-3,3-LF) which costs about $5 on DigiKey, and has 2.5ppm precision plus temperature compensation :)Following this, a subsequent recalibration adjustment to the 'Freq. Fine Tuning' option in the 'System Setup' menu has allowed me to get a stable and low-ish jitter signal regardless of output frequency.
Clayton
2025-01-02 14:58:32
It’s quite easy to use and very lightweight.Is it lab quality accurate? Probably not. It is good enough for my day-to-day use testing circuits.I would recommend it if your thing is simple development or repair.
Guy Bisson
2024-12-27 16:45:08
The generator was ok and after a few days the chanel 1 stop working.A few mail with support to explain my problem, and to do the tests they asked of me, they send a replacement main board.The new board was the good way to correct the problem.Work fine now.
Joani F.
2024-12-26 10:17:02
Arrived on time and in good condition. Has amazing capabilities just what my husband needed for some lab work with his university courses
Bruce M. Walker
2024-12-22 09:21:33
I bought this signal generator to replace my very old (1970's) Heathkit instrument. I needed to repair some older hi-fi gear that I wanted to put back into service. I had earlier acquired a modern digital oscilloscope to use with it [Hantek DSO5102P].This signal generator is pretty amazing. I really just needed square waves and sine waves in the audio range (20Hz - 20KHz) for my work, but I figured it wouldn't hurt to have more capability and I did spend some time trying the extra functionality out. The unit is light, but that didn't cause me any problems. It's very compact which is perfect for my tight work space.I did find the arrow-key method for adjusting the output frequency to be a bit un-obvious and slightly annoying, but I can get used to it. (To be honest, I prefer the big sweep knob on the old Heathkit generator.)But I cannot complain about the quality of the output signals generated or the amazing range of features it has. I will be able to use this device for all sorts of design and troubleshooting in future.
David
2024-11-26 11:04:56
It's extremely light, I assume the case is mostly empty space, with a small circuit board mounted on the front of the case.The on/off button on mine is a little dodgy, it takes a very precise push to turn the device on, but there merest whisper of a touch to turn it off. But I can live with it.With the device feeling so light, I feel it’s a little overpriced, but it does work well, and the UI is pretty intuitive.
Recommended Products

$9.99

$ 3 .99 $3.99

4.3
Select Option