The SFG-1000 Series, an economic function generator with high accuracy and high stability output, are designed based on the DDS (Direct Digital Synthesized) technology embedded in a large scale FPGA.
The 3MHz frequency range and the output waveform selection of Sine, Square, Triangle and TTL available in the SFG-1000 Series adequately provide the fundamental functions to ensure high confidence in test results. The DDS technology at an affordable price gives a high value solution to the users who need a signal source for accurate but simple measurement applications.
Output Function Frequency Range(For Sine, Square) Frequency Range(For Triangle) Frequency Resolution Frequency Stability Frequency Accuracy Aging Amplitude Range Amplitude Accuracy Impedance Attenuator DC Offset Duty Control Range Display Output Control
Sine, Square, Triangle, TTL 0.1Hz ~ 3MHz
0.1Hz ~ 1MHz 0.1Hz maximum ±20ppm ±20ppm ±5ppm/year 10Vp-p (into 50Ω load) ±20% at maximum position (only SFG-1013) 50Ω±10% -40dB±1dB×1 ＜-5V ~ ＞5V (into 50Ω load) 25% ~ 75% below 1MHz (for square wave only) 6-digit LED display ON/OFF selector
Flatness (at maximum amplitude relative to 1kHz)
Maximum Amplitude attenuation to 1/10 of any panel settings, TTL OFF ≧-55dBc, 0.1Hz ~ 200kHz ≧-40dBc, 0.2MHz ~ 2MHz ≧-35dBc, 2MHz ~ 3MHz ＜±0.3dB, 0.1Hz ~ 1MHz ＜±0.5dB, 1MHz ~ 2MHz ＜±1dB, 2MHz ~ 3MHz
≧98%, 0.1Hz ~ 100kHz ; ≧95%, 100kHz ~ 1MHz
Symmetry Rise or Fall Time
5% of period+4ns, 0.1Hz ~ 100kHz ≦100ns at maximum output (into 50Ωload)
Level Fan Out Rise or Fall Time
≧3Vp-p 20 TTL load ≦25ns
Indoor use, altitude ＜2000m Ambient Temperature : 0°C ~ 40°C Relative Humidity: ＜80% at 0°C ~ 40°C Up to 70% at 35°C ~ 40°C Installation category II Pollution Degree 2
AC 100V/120V/220V/240V±10%, 50/60Hz
-10°C ~ 70°C 70% (Maximum).
DIMENSION & WEIGHT
251(W) x 91(H) x 291(D) mm, Approx. 2.1kg
User Manual x1, Power Cord x1, Test Lead GTL-101 x1
3MHz DDS Function Generator
3MHz Dual Display DDS Function Generator
Manuals & Guides
SFG-1000 Series User Manual
Brochure & Datasheet
SFG-1000 Series Datasheet
What are the minimum voltage and resolution for GWInstek’s 3MHz DDS function generator SFG-1013 with specifications including attenuator as -40dB±1dB X1 amplitude accuracy as ±20% at maximum position?
The minimum voltage for this DDS function generator is 1V x 0.01 = 0.01V = 10 mV. And its amplitude resolution is -40dB±1dB X1 amplitude accuracy as ±20% at maximum position.
What is the maximum frequency of a triangle wave less than sine and square waves for all DDS type function generators?
In order to have straight charge and a discharge curve of a triangle wave, the essential amount of data points is less than sine and square waves. In the case of insufficient data points for the triangle wave, a low pass filter makes it look like a sine wave.
Square symmetry at 100kHz
On GW Instek’s function generator of GFG/SFG Series, the symmetry specification of square waveform is almost at 100kHz, but the square is more big than 100kHz, why not define the symmetry range and square frequency range on the same range??
In all of type DDS function generators, why the triangle waveform maximun output frequency were always lower than sine waveform and square waveform?
In order to have straight charge and discharge curve of triangle wave, the number needed of data point is more than sine and square waves. In the case of less data point of triangle wave, the loss pass filter will make it look like sine wave.
Why has more measurement applications that use DDS function generator to be better than traditional function generator？
DDS FG is better than traditional FG in most of the applications. For example: the narrow pulse, ARB....etc.Because of the frequency stability and low distortion, the DDS is more adaptive as a signal source. Only in the few cases like higher frequency triangle wave and external FM function, the traditional function generators have better functionality.
Why the output signal displayed on oscilloscope is 1Vpp, but Feed the signal to DUT(Device Under Test),the amplitude is in half , 0.5 Vpp？
The input impedance of oscilloscope is 1M Ω,but function generator output impedance is 50Ω,if the DUT load is also 50Ω and connected to generator, the oscilloscope will ,measure half amplitude. Based on the same theory, for the generators like CFG-3015 and SFG-830,there are amplitude displays. The displayed amplitude is based on 50Ω load. For example ,the displayed 1Vpp means the voltage on the connected 50Ω load. If we disconnect the load and use oscilloscope to measure the voltage directly,2Vpp is measured on oscilloscope.
Why is the duty cycle specification specified at the frequency lower than the maximum main output frequency for all function generators？
If the duty cycle is set to significant ratio, say 99：1 at 4MHz ,the 1％ of frequency of 4MHz will be much higher than 4MHz,thus it is over the bandwidth the FG specified. Therefore, the lower frequency limit of duty cycle specification is indicated.