GW Instek SFG-830 Arbitrary Waveform Generator
The Instek SFG-830 is a Direct Digital Synthesis design using DDS technology to generate stable output frequency waveforms with extraordinary resolution.
Traditional frequency synthesized function generators typically are designed using Phase Locked Loop (PLL) technology which utilize a dynamic loop filter resulting in problems such as poor phase jitter and frequency switching response.
PLL designs require a wave -shaping circuit with an address counter that is controlled by a variable frequency clock. The counter addresses memory locations in a waveform RAM where the RAM output is then converted by a high speed digital-to-analog converter (DAC) to produce an analog output signal. Problems such as poor phase jitter and lack of proper transient response arise here as well.
DDS designs avoid the problems by using a variable speed clock frequency and a 32 bit high speed DAC.
Abbreviated Specifications
Abbreviated Specifications
Output Waveforms: Sine, Triangle, Ramp, Square, Sync Output, Arbitrary
Arbitrary Waveform: 12000 points max with 12bit Vertical Resolution
Range: Sine: 20mHz ~ 30MHz
Square: 20mHz ~ 30MHz
Triangle: 100mHz ~ 100kHz
Ramp: 10mHz ~ 100kHz
Frequency Resolution: (milli-Hz)
Sine & Square: 20mHz
Triangle & Ramp: 10mHz
Amplitude: 10mV~10Vpp + DCV offset <5V (Into 50Ω)
Sweep: Line of Log from 20mHz to 30Mhz
AM ~ Modulation Rate: 10mHz to 10KHz Int.-50KHz Ext.
FM ~ Modulation Rate: 10mHz to 10KHz
Interface: RS-232 Std, GRIB IEEE-488.2 Optional
FEATURES：
- 30MHz Direct Digitally Synthesized Source
- 20 mHz Frequency Resolution
- +/-10ppm Frequency Accuracy
- 12 Bit, 5M Sample/S Arbitrary Waveforms
- Remote Controlled
- FM Stereo Modulation ~(GSG-122)~ Internally Synthesized FM , AM and Phase Modulation (PSK)
- Arbitrary Modulation
- Linear and log Sweeps
- +/- 10ppm Frequency Accuracy Std. Standard Interface : RS-232C
- IEEE-488 Interface (SFG-830G)
Budgetary Guidance: Under $1450
________________________________________________________________________
SFG-2000 series DDS Function Generators
DDS series frequency synthesizer Function Generators consists of a Phase Accumulator, a lookup (ROM or RAM) waveform table, a high-speed Digital-to-Analog Converter (DAC), and a Low Pass Filter (LPF). The phase accumulator accumulates K by adding K with its output for every clock cycle. The output of
the accumulator is used to position the data in the ROM-RAM Table. The DAC converts the digital data into an analog waveform with step-shape generated from the digital data. The following LPF smoothes the step shape by filtering out the clock frequency to form a very pure sine wave.
SFG-2120 DDS Function Generator - 20MHZ, w/Ext. Counter, Sweep, AM/FM
Featuring:
- DDS Technology and FPGA Chip Design
- Frequency Range:0.1Hz~10MHz
- High Frequency Accuracy : ± 20ppm
- High Frequency Stability : ± 20ppm
- Frequency Resolution :100mHz
- Low Distortion Sine Wave:-55dBc,0.1Hz~200kHz
- Front Panel Setting Save/Recall with 10 Groups of Setting Memories
- Build-in 6 Digits 150MHz/High Resolution Counter
- INT/EXT AM/FM Modulation
- LIN/LOG Sweep Mode
Budgetary Guidance: Under $525
__________________________________________________________
GFG-3015 Function Generator - 15MHz w/ Ext. Counter, Sweep, AM/FM
Waveforms: Sine, Square, Triangle, Ramp, Pulse, AM, FM, Sweep, Trigger and
Gate / Burst
FEATURES：
- Frequency Range 0.01Hz~15MHz
- Max. Frequency Resolution 10mHz
- Dual Display Indicate Frequency and Amplitude
- Built-in 6-digit Counter with INT/EXT Function up to 150MHz High Resolution
- Output Waveforms Sine, Square, Triangle, Ramp, Pulse, AM, FM, Sweep, Trigger and
Gate / Burst
- VCF for 100:1 EXT Frequency Control
- INT/EXT, AM/FM Modulation
- GCV Output for Synchronization
- Variable DC Offset Control
- SYNC Output
- LIN/LOG Sweep Mode
- Output Overload Protection
- RS-232C Interface Standard
Budgetary Guidance: Under $725
________________________________________________________
GFG-8215A 3MHz Function Generator
- Frequency Range：0.3Hz ~ 3MHz
- Waveforms: Sine, Triangle, Square, Ramp, TTL and CMOS Output
- External Voltage Controlled Frequency (VCF) Function
- Duty Cycle Controlled with Signal Inversion Capability
- Variable DC Offset Control
- Two-Step (-20dB x 2) and Variable Attenuator
Budgetary Guidance: Under $175
________________________________________________________________
GAG-810 1MHz Audio Oscillator
Featuring:
- Frequency from 10Hz ~ 1MHz
- 0.02% Low sine wave distortion
- 6 steps output attenuator
- EXT SYNC Function
Budgetary Guidance: Under $ 200
____________________________________________________________
GRG-450B 150MHz RF Generator
Six Ranges: 150KHz to 150MHz ( to 450MHz on calibrated Harmonics)
AM Modulation: 1KHz Internal
50Hz to 20KHz External
External Output: 50mVrms MIN
Budgetary Guidance: ~$200
|
