Order Function Generators & Signal Synthesisers Online - Fast Local Stock

Why buy your function generator from Communica in South Africa

Get the right signal source quickly: Communica holds a broad range of function generators and DDS synthesisers suitable for hobbyist labs, university testbenches and engineering teams. Local stock reduces lead times, lets you collect from our Samrand or Cape Town branches, and ensures you receive VAT invoices and quote support for procurement.

Practical value over specs

Rather than selling the highest MHz number, we prioritise tools that solve real problems: clean sine and arbitrary waveforms for sensor testing, stable frequency sweep for filter characterisation, and triggered burst modes for digital timing checks. Consider waveform fidelity, output amplitude, distortion (THD), and modulation options when you choose.

Fast local support and collection

Order online and use branch pickup to avoid courier delays: check stock in Samrand before you travel. See our branches and trading hours for collection windows and contact details here.

Key specifications to compare

When comparing models, use a short checklist so you buy what you need and not what looks impressive on paper.

• Frequency range and resolution - does it cover your highest test frequency?
• Waveform types - sine, square, triangle, ramp, pulse, arbitrary (ARB)
• Output amplitude and impedance - match to your DUT or amplifier input
• Modulation & sweep - AM/FM, frequency sweep and burst/trigger capability
• Connectivity - USB, LAN or GPIB for remote control and waveform upload

Specification comparison table

Below is a compact comparison format you can use when choosing between common bench-grade, compact and USB models.

Compatibility guidance and accessories

Match output impedance and amplitude to your device under test. Most generators use 50 ohm outputs; if your circuit expects high impedance, use a coupling resistor or buffer amplifier. We stock matching BNC leads, 50 ohm terminators, and isolation transformers so you can build a safe test chain.

Explore product categories and brands to compare options and accessories on our Collections page here and browse all products here.

Real-world buying scenarios and examples

Example 1 - Electronics lab for a tertiary course: choose a USB-controlled ARB that integrates with lab PCs for automated experiments. Example 2 - Field service technician: a compact handheld unit with battery operation and frequency counter is more useful than a large bench unit. Example 3 - R&D bench: a high-resolution DDS with low phase noise and external reference input is worth the premium.

Accessory bundle suggestions

• Basic testing bundle: function generator + BNC-BNC cable + 50 ohm terminator
• Education bundle: USB generator + software suite + lab leads + documented experiment notes
• R&D bundle: bench DDS + calibration kit + precision attenuator + power splitter

Troubleshooting & practical tips

If your waveform looks distorted at the DUT, check for wrong termination or drive into a reactive load. Use an oscilloscope with matching 50 ohm input or a high-impedance probe and confirm amplitude with a multimeter set for AC RMS where appropriate.

Simple trigger wiring (ASCII):
Generator TRIG OUT -----||----- Scope TRIG IN
(through TTL coupling or 10k pull-up as needed)

Objection handling - availability, service and procurement

Concerned about lead times? We list stock availability online and offer branch pickup in Samrand and Cape Town to bypass courier delays. Need a formal quote or VAT invoice for your department? Request a quote and our sales team will issue account pricing and documentation. Learn more about our company and service commitments on the About Us page here.

Summary - why order through Communica

We combine broad brand choice, practical advice, and South African logistical convenience so you get the right signal generator quickly and with the accessories to complete the job. Compare specs, check stock in Samrand, or request a quote for procurement-options exist for students, makers and engineering teams alike.

Ready to proceed? Shop Now, Check Stock in Samrand, Compare Specs or Request a Quote to match a model to your workflow. For browsing by manufacturer, visit our Shop by Brand page here.