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Siglent SDG1025 25MHz Arbitrary Waveform Generator

Item no. SDG1025
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Siglent SDG1025 25MHz Arbitrary Waveform Generator

Item no. SDG1025
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Siglent SDG1025 25MHz Arbitrary Waveform Generator Review & Features

High Level Performance for a Reasonable Price

Shipped & Supported from the USA

3 Year limited warranty

The SDG1025 Function/Arbitrary Waveform Generator represents a new level of price performance  value from SIGLENT.  The ergonomic design features a 3.5 inch TFT-LCD display;  Online help feature; Support for USB and internal storage to accomodate file management; . The SIGLENT SDG1025 implements a  DDS  ( Direct Digital Synthesizer) design which provides several technical advantages over older analog Function/Waveform generators including enhanced frequency agility, better phase noise and more precision to control the output phase across frequency switching transitions. 

Arbitrary Waveform Generation Capabilities:

The SIGLENT SDG1025 generates 14-bit 16kpts arbitrary waveforms, Arbitrary editing software (EasyWave) provides 9 standard waveforms: Square, Sine, Pulse, Ramp, Exponential Fall, Exponential lRise, Sinc, Noise and DC, which meets’ basic needs of all engineers; It is easy to develop your  own waveforms using EasyWave drawing software with your computer mouse.  Supports point-to-point line segment drawing and arbitrary point drawing.making it easy to create complex waveforms. Multi-file screen management helps the engineer  edit multiple-waveforms at the same time. It provides ten (10) Storage locations in non-volatile RAM. You can edit and store more waveforms on your PC by using the EasyWave sofware.

Click Here to view Siglents 50MHz version of this product

Main Features:

  • DDS technology, dual-channel output. Outputs are totally independent with adjustable phase shift.
  • 125MSa/s sample rate, 14bit vertical resolution.
  • 5 types of standard output waveforms, built-in 48 arbitrary waveforms.
  • Complete set of modulation functions: AM, FM, PM, FSK, ASK, PWM, linear/logarithmic sweep, burst.
  • Abundant input/output: waveform output, ‹ Synchronous signal output, External modulation source input, 10MHz clock input, external trigger input, internal trigger output etc. 
  • Channel coupling and duplication function 
  • Built-in accurate freq. counter allows the user to measure frequencies up to 200MHz (single channel) 
  • Standard interfaces: USB Device, USB Host, 
  • High precision clock
  • Supplied with powerful arbitrary editing software (EasyWave)
  • Supports Remote control

Arbitrary waveform output:

Built-in 48 arbitrary waveforms, including math, engineering and other commonly-used waveforms.

Complete set of modulation functions, sweep output, burst output.

  • Complete set of modulation functions: AM, DSB-AM, FM, PM, FSK, ASK, PWM, the modulation waveform can be observed directly, which it is desirable for education and training sessions;
  • Sweep output: varies output frequency from start frequency to stop.  Sweep time range: 1ms~500s. The carrier can be Sine, Square, Triangle and Arbitrary waveforms. 
  • Burst output: It can periodically generate pulse sequences. Internal counter and external control signal are available to control burst output.

Dual-channel Synchronization:

Duplicating function 

  • Channel coupling: after setting the primary channel and coupling frequency/phase differences, the frequency/phase of the second channel will change in relation to the primary channel, maintaining the frequency /phase difference .
  • Channel duplicating: allows user to duplicate parameters from one channel to the other.

Built-in frequency counter:

Wide frequency range: 0.1Hz~200MHz. Measurable parameters: frequency, period, duty-cycle, positive pulse width, negative pulse width Ssetting: Adjustable parameters include DC/AC coupling, trigger level and high frequency rejection.


  • Maximum output frequency: 25MHz 
  • Output channels: 2 
  • Sample rate: 125MSa/s 
  • Arbitrary waveform length: 16kpts 
  • Frequency resolution: 1μHz 
  • Vertical resolution: 14bits 
  • Waveforms: Sine, Square, Ramp, Pulse, Gaussian Noise. 48built-in arbitrary waveforms(include DC)
  • Modulation: AM, DSB-AM, FM, PM, FSK, ASK, PWM, Sweep, Burst
  • Frequency counter Range: 100mHz~200MHz
  • Standard interface: USB Host & Device
  • Dimension: Width x Height x Depth=229mm x 105mm x 281mm

Frequency Specifications:

  • Waveforms: Sine, Square, Ramp, Pulse, Noise, Arbitrary 
  • Sine: 1μHz ~ 25MHz
  • Square: 1μHz ~ 25MHz
  • Pulse : 500μHz ~ 5MHz
  • Ramp/Triangular: 1μHz ~ 300kHz
  • Gaussian white noise: 25MHz (-3dB)
  • Arbitrary: 1μHz ~ 5MHz 
  • Resolution: 1μHz 
  • Accuracy: Within 90daysv±50ppm within 1 year ±100ppm 18°C~28°C 
  • Temperature coefficient: <5ppm/°C

Sine Spectrum Purity:

  • DC~1MHz -60dBc 
  • 1MHz~5MHz -53dBc 
  • 5MHz~25MHz -35dBc 
  • Total harmonic waveform distortion ( Channel 1 & Channel 2)  DC~20kHz,1Vpp<0.2% 
  • Spurious signal(non-harmonic) 
    • DC~1MHz<-70dBc 
    • 1MHz~10MHz<-70dBc+6dB/spectrum phase
  • Phase noise 10kHz Offset,–108dBc/Hz(typical value)


  • Rise/fall time <12ns(10% ~ 90%) 
  • Overshoot <5%(typical,1kHz,1Vpp) 
  • Duty Cycle
    • 1μHz ~10MHz 20%~80% 
    • 10MHz(exclude)~20MHz 40%~60% 
    • 20MHz(exclude))~25MHz 50% 
  • Asymmetric(50% Duty Cycle) 1% of period+20ns(typical,1kHz,1Vpp) 
  • Jitter 0.1% of period(typical,1kHz,1Vpp)


  • Linearity <0.1% of Peak value output(typical,1kHz,1Vpp,100% symmetric) 
  • Symmetry 0%~100%


  • Pulse width 1800s, Max. 16 ns, Min. 8 ns resolution 
  • Rise/Fall time (10% ~ 90%,typical,1 kHz,1Vpp) 7ns 
  • Duty Cycle 0.1%Resolution 
  • Overshoot <5% 
  • Jitter(pk-pk) 8ns


  • Waveform length 16k points 
  • Vertical resolution 14bits 
  • Sample rate 125MSa/s 
  • Min. Rise/Fall time 7ns(typical) 
  • Jitter(pk-pk) 8ns(typical) 
  • Storage in non-volatile RAM memory (10 in total): 10 waveforms

Output Specifications:

  • Output Amplitude
    • CH1:
      • 2mVpp~10Vpp(50Ω,≤10MHz)
      • 2mVpp~5Vpp(50Ω,>10MHz)
      • 4mVpp~20Vpp(high
      • impedance,≤10MHz)
      • 4mVpp~10Vpp(high
      • impedance,>10MHz)
    • CH2
      • 2mVpp~3Vpp(50Ω)
      • 4mVpp~6Vpp(high impedance)
  • Vertical accuracy (100 kHz sine)
    • CH1 ±(0.3dB+1mVpp of setting value)
    • CH2 ±(0.3dB+1mVpp of setting value)
  • Amplitude flatness (compared to 100 kHz sine,5Vpp) ±0.3 dB
  • Channel phase deviation <400ps (classic value,sine,50MHz,4vpp) 
  • Cross talk <-70dBc 

DC Offset:

  • Range(DC) 
    • CH1 ±5V(50Ω) ±10V(high impedance) 
    • CH2 ±1.5V(50Ω) ±3V(high impedance)
  • Offset accuracy
    • CH1 ±(|setting offset value|*1%+3mV) 
    • CH2 ±(|setting offset value|*1%+3mV

Waveform Output:

  • Impedance: 50Ω(typical)
  • Protection: short-circuit protection

AM Modulation (CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Source Internal/External 
  • Modulation waveform Sine, Square, Ramp, Noise, Arbitrary (2mHz ~ 20kHz) 
  • Modulation depth 0% ~ 120% 

FM Modulation(CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Source Internal/External 
  • Modulation waveform Sine, Square, Ramp, Noise, Arbitrary(2mHz~20kHz) 
  • Frequency deviation 0 ~0.5*bandwidth 10μHz resolution 

PM Modulation (CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Source Internal/External 
  • Modulation waveform Sine, Square, Ramp, Noise, Arbitrary(2mHz~20kHz) 
  • Phase Deviation 0~360° ,0.1°Resolution 

FSK Modulation (CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Source Internal/External 
  • Modulation waveform 50% duty-cycle square waveform(2mHz~50kHz)

ASK Modulation (CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Source Internal/External 
  • Modulation waveform 50%duty-cycle square waveform(2mHz~50kHz)
PWM Modulation (CH1/CH2):
  • Frequency 500μHz~20kHz 
  • Source Internal/External 
  • Modulation waveform Sine, Square, Ramp, Arbitrary(except DC) 
  • External Modulation range -6V~+6V (maximum width deviation) 

Sweep (CH1/CH2):

  • Carrier Sine, Square, Ramp, Arbitrary(except DC) 
  • Type: linear/logarithmic
  • Direct: Up/down
  • Sweep time 1ms~500s 
  • Trigger source: Manual, external, internal

Burst (CH1/CH2):

  • Waveform Sine, Square, Ramp, Pulse, Arbitrary(except DC) 
  • Type: Count(1~50,000 periods),infinite, Gated
  • Start/Stop phrase 0°~+360°
  • Internal period 1μs~500s
  • Gated source: External trigger
  • Trigger source: Manual, External or Internal

Rear Panel Connector:

  • External modulation: ±6V=100% modulation>5kΩ input impedance 
  • External trigger: TTL compatible 
  • Note: The external input voltage can’t be over ±6V, otherwise instrument gets damaged.

Trigger Input:

  • Input Level: TTL compatible 
  • Slope: Rising Edge/Falling Edge
  • Pulse width >100ns 
  • Input impedance >5kΩ,DC coupling 

Trigger Output:

  • Voltage level TTL compatible 
  • Pulse width >400ns
  • Output impedance 50Ω (typical)
  • Max. frequency 1MHz 

SYNC Output:

  • Voltage level: TTL compatible
  • Pulse width >50ns 
  • Output impedance 50Ω(typical)
  • Max. frequency 2MHz

Frequency Counter:

  • Measurement: Frequency, Period, Positive/negative pulse width, duty cycle
  • Frequency range: Single Channel:100mHz~200MHz
  • Frequency resolution: 6bits/s 

Manual DC Coupling:

  • DC offset range ±1.5VDC
  • 100mHz~100MHz: 50mVrms~±2.5V
  • 100MHz~200MHz 100mVrms~±2.5V

Manual AC coupling:

  • 1Hz~100MHz 50mVrms~5Vpp 
  • 100MHz~200MHz 100mVrms~5Vpp 

Pulse width and duty-cycle measurement:

  • 1Hz~10MHz(50mVrms~5Vpp) 

Input adjustment:

  • Input impedance 1M ohm
  • Coupling mode AC,DC 
  • High-frequency rejection ON/OFF 

Trigger level range:

  • -3V~ +1.8V

General Specification:

  • Display 
    • Display type 3.5inch TFT-LCD 
    • Resolution 320×RGB×240 
    • Color depth 24bit 
    • Contrast Ratio 350:1(typical) 
    • Luminance 300cd/m2(typical)
  • Power
    • Voltage
      100~240 VACRMS, 45~66Hz,CATII  
    • Consumption <30W
    • Fuse 1.25A,250V
  • Environment 
    • Temperature
    • Humidity range 
      Below +35°:≤90% relative humidity
      +35?~+40°:≤60% relative humidity 
    • Altitude 
      Operation: below 3,000 meters 
      Storage: below 15,000 meters
  • Dimension
    • Width: 9 1/64th" (229mm)
    • Height: 4 9/64th" (105mm) 
    • Depth: 11 1/16th" (281mm)
  • Weight
    • N.W: 2.6Kg
    • G.W: 3.4Kg

Users Manual 


3-year limited warranty

30 day satisfaction guarantee
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Your satisfaction is important to us. If you're not satisfied, return the product within 30 days of purchase for a refund or credit.

Return policy
Three year warranty
Limited Warranty
Circuit Specialists wants you to be happy with your purchase. This product comes with a three-year limited warranty.

Warranty policy
Free tech support
Free Tech Support
Circuit Specialists offers free technical support for the life of your product. Please call our technical team with any questions.

1-800-528-1417 ext. 3
Mon - Fri: 8:00 AM - 5 :00 PM (MST)

Expected delivery within 3-7 business days after shipping. Free shipping offer applies only to orders that weigh under 150 lbs. Offer limited to the contiguous U.S. Certain exclusions and limitations may apply. Circuit Specialists reserves the right to modify or discontinue any offer at any time.

Some products must be specially ordered, usually resulting in a 1–2 business day delay. Please contact us for an estimated delivery date.