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Instek GTL-232 RS-232C Cable

Brand New
Instek GTL-232 RS-232C Cable

Instek GTL-232 RS-232C Cable

Brand New
Model#: GTL-232
Stock #:

Expedite Available
Availability: Contact Us

Item Details & Specifications

This Instek GTL-232 RS-232C Cable is Brand New and has full manufacturer's warranty. 56578

Product Family Overview

Instek SFG-830 30MHz Arbitrary / Function Generator

  • 30MHz Direct Digitally Synthesized Source
  • 20mHz Frequency Resolution
  • ±10ppm Frequency Accuracy
  • 12Bit, 5M Sample/S Arbitrary Waveforms
  • Sine, Triangle, Ramp and Square Waveforms
  • Internally Synthesized FM, AM and Phase Modulation (PSK)
  • Low Distortion
  • RS232 interface
  • Arbitrary Modulation
  • Linear and log sweeps
  • Optional IEEE-488 Interface only for SFG-830G
  • Free Arbitrary Waveform Composer Software for Windows 95/98/2000


The frequency synthesis method applied by the Instek SFG-830 is Direct Digital Synthesis (DDS), a new technique that generates stable output frequency with extraordinary resolution.

Unlike SFG-830, traditional frequency synthesized function generators typically use Phase Locked Loop (PLL) techniques. In order to synthesize frequencies, PLL should be high-resolution (up to 1:106 in general) and needs a stable frequency to be referenced. Due to the utilization of dynamic loop filter, problems such as poor phase jitter and frequency switching response may occur when running the PLL system. As in generating waveforms, PLL needs a wave-shaping circuit with an address counter that controlled by a variable frequency clock. The counter addresses memory locations in a waveform RAM, and the RAM output is converted by a high speed digital-to-analog converter (DAC) to produce an analog output signal.

Problems like poor phase jitter and transient response may arise here as well. Although DDS also generates analogue waveforms by way of the waveform RAM and high speed DAC, it does not have the problems as PLL does due to the use of fixed frequency clock (fs). Besides, the resolution of DDS is higher than that of PLL’s. DDS’s resolution is fs/2k where the digit of the control frequency word (K), which is more than 32bits in general, decides the quality of it.

Additional Photos

Instek GTL-232 RS-232C Cable


  • Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above Item Details & Specifications section and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.