Siglent SDG2042X 40 MHz 2-Channel Arbitrary Waveform Generator

SDG2042X is the 40 MHz, dual-channel member of the Siglent SDG2000X series of function and arbitrary waveform generators, with a 1.2 GSa/s, 16-bit sampling system, up to 20 Vpp output amplitude and a 4.3 inch touchscreen.

Low-jitter pulses and true point-by-point arbitrary waves

Conventional DDS generators can show one-clock jitter when the sample clock is not an integer multiple of the output frequency. Siglent addresses this with two techniques named in the datasheet. EasyPulse produces square and pulse waveforms with jitter of 150 ps rms (cycle to cycle) and lets pulse width be set from 16.3 ns in 100 ps steps, with rise and fall times from 8.4 ns to 22.4 s.

TrueArb generates arbitrary waveforms point by point, never skipping a point, for waveforms of 8 points to 8 Mpts at sample rates from 1 µSa/s to 75 MSa/s. The generator ships with 196 built-in arbitrary waveforms and a frequency counter that measures 0.1 Hz to 200 MHz.

Key features as printed in the datasheet

• Both channels guarantee 20 Vpp amplitude at 20 MHz and below (10 Vpp above 20 MHz) into a high-impedance load.
• Modulation: AM, DSB-AM, FM, PM, FSK, ASK, PSK and PWM, with internal or external source.
• Linear and logarithmic sweep; N-cycle and gated burst; harmonic function up to the tenth order.
• Standard USB host, USB device (USBTMC) and LAN (VXI-11); GPIB through a USB-GPIB adapter.
• EasyWaveX arbitrary waveform editing software.

Technical specification

Models in the series

Waveform characteristics

Output, counter and auxiliary

General and environmental

Choosing a model and accessories

The three order codes differ only in maximum bandwidth: SDG2042X 40 MHz, SDG2082X 80 MHz, SDG2122X 120 MHz. Standard configuration is a quick start, power cord, USB cable, calibration certificate and a BNC coaxial cable. Optional items are the USB-GPIB adapter, a 20 dB attenuator and the SPA1010 10 W power amplifier. Specifications apply only inside the calibration period and after 30 minutes of operation at 18 to 28 °C.

Operating notes

Output amplitude is specified into a high-impedance load; divide by two for a 50 Ω load, as the datasheet notes. Lock several instruments to one 10 MHz reference using the rear reference input and output. The protection rating is IP20, which means indoor use only, with no dust or water resistance. Calibrate every year as per the datasheet interval.

Use in repair, training and production test

A dual-channel generator can inject sensor-like signals into amplifiers, PLC analog inputs and data acquisition front ends, simulate quadrature encoders with the two channels, or provide clock and pulse sources for digital debugging. At 40 MHz it covers audio, instrumentation and most control-system test needs in college labs and service benches. The frequency counter lets it double as a quick frequency check.

Selection and installation notes

Test and measurement instruments are selected from the accuracy, the range and the interfaces the work needs. Allow the warm-up time, use leads and probes rated for the voltage and category of the circuit, keep the inputs inside the stated limits and keep the calibration current according to your quality system. Record the settings used for any test that must be repeated later.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Related items

Siglent offers the SPA1010 power amplifier, a 20 dB attenuator and a USB-GPIB adapter for this series. Use it with a Siglent oscilloscope such as the SDS1104X-E for signal verification. See the Portable Test and Measurement category.

Frequently asked questions

What bandwidth does the SDG2042X have?

40 MHz sine output on two channels, with 1.2 GSa/s sampling and 16-bit vertical resolution.

What is TrueArb?

Siglent describes TrueArb as point-by-point arbitrary waveform generation for 8 points to 8 Mpts, avoiding one-clock jitter of conventional DDS.

What is the maximum output amplitude?

20 Vpp into a high-impedance load at 20 MHz and below; the value is halved into a 50 Ω load.

Does it include a frequency counter?

Yes. It measures frequency, period, pulse width and duty cycle from 0.1 Hz to 200 MHz.

Is Seven Star LLC a Siglent distributor?

No, we are an independent supplier in Muscat and supply Siglent items on request rather than acting as a Siglent channel partner.

Documents and quotation

For quotation, send your required quantity and destination. The Siglent datasheet for SDG2042X is provided below the description on this page. Seven Star LLC works as an independent supplier from Muscat. Please compare code, ratings and approvals with the document before you place an order; see also the category listing.