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.
| Model class | Freq range | Waveforms | Best for |
|---|---|---|---|
| Bench DDS | 1 mHz-50 MHz | Sine, square, ARB | Precision lab testing, low distortion |
| Portable/handheld | 1 Hz-1 MHz | Sine, square, triangle | Field testing and quick checks |
| USB/PC-controlled | DC-20 MHz | ARB, sweep via software | Automated test setups & education |
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.
