Function Generators — Buy & Sell Used Function Generators
Function generators and arbitrary waveform generators from basic 20 MHz bench units to multi-GS/s AWGs. These move fast on the secondary market — if you have surplus, we'll quote it quickly; if you need one, we likely know where to find it.
Available Models & Sourcing Catalog
We buy and sell tested, verified-working used function generators from leading brands. Find your model below to request a buy quote or get an offer on yours.
| Brand | Model | Description | Actions |
|---|---|---|---|
| Keysight / Agilent | 33622A | 120 MHz, 2 ch AWG | |
| Keysight / Agilent | 33522B | 30 MHz, 2 ch | |
| Keysight / Agilent | 33509B | 20 MHz, 1 ch | |
| Keysight / Agilent | 33250A | 80 MHz function/arb | |
| Keysight / Agilent | 33220A | 20 MHz function/arb | |
| Keysight / Agilent | 33120A | 15 MHz function/arb | |
| Keysight / Agilent | 81150A | 120 MHz pulse/function | |
| Keysight / Agilent | 81160A | 330 MHz pulse/function | |
| Tektronix | AFG31052 | 50 MHz, 2 ch | |
| Tektronix | AFG31252 | 250 MHz, 2 ch | |
| Tektronix | AFG3022C | 25 MHz, 2 ch | |
| Tektronix | AFG3102C | 100 MHz, 2 ch | |
| Tektronix | AFG3252C | 240 MHz, 2 ch | |
| Tektronix | AWG5204 | 5 GS/s, 4 ch AWG | |
| Tektronix | AWG70001A | 50 GS/s AWG | |
| Rigol | DG1022Z | 25 MHz, 2 ch | |
| Rigol | DG4162 | 160 MHz, 2 ch | |
| Rigol | DG5252 | 250 MHz, 2 ch | |
| Siglent | SDG2042X | 40 MHz, 2 ch | |
| Siglent | SDG6052X | 500 MHz, 2 ch | |
| Stanford Research | DS345 | 30 MHz synthesized | |
| Berkeley Nucleonics | 765 | Fast pulse generator | |
| Keysight / HP | 8116A | 50 MHz pulse/function |
Function Generators Buying Guide
Function and arbitrary waveform generators are chosen on maximum frequency or bandwidth, sample rate and vertical resolution, channel count, and arbitrary-waveform memory depth. A basic function generator outputs standard sine, square, ramp, and pulse waveforms; an arbitrary waveform generator (AWG) lets you define custom shapes, and there its sample rate, resolution, and memory determine how faithfully and how long a waveform it can play. Decide first whether standard functions suffice or whether you need true arbitrary playback, then size the rest to your application.
Used value follows channel count, the bandwidth/sample-rate tier, arbitrary memory, and modulation options. Keysight's 33500B and 33600A Trueform generators and Tektronix AFG31000 cover bench needs, while high-speed AWGs like the Keysight M8190 and AWG70000 series serve advanced radar, comms, and research work and carry far higher value. Modulation and sequencing options add worth. A current calibration certificate commands a premium. List channels, memory, and options when you request a quote.
Refurbished generators typically save 40-70% off list with identical performance on mature designs. The 33500/33600 Trueform family offers excellent bench value, while high-speed AWGs command strong prices given their five-and-six-figure new cost. Whether you're sourcing a unit or retiring one, send us the model and its configuration and we'll quote within one business day.
Frequently Asked Questions
How much is my used function generator worth?
Value depends on the model, bandwidth and sample-rate tier, channel count, arbitrary memory, and calibration status. High-speed AWGs are worth considerably more than bench units. Send us the model and configuration and we'll return a fair-market offer within one business day.
What's the difference between a function generator, an AWG, and a high-speed AWG?
A function generator outputs standard waveforms (sine, square, ramp, pulse). An arbitrary waveform generator (AWG) plays user-defined shapes. High-speed AWGs add very high sample rates and bandwidth for radar, wideband comms, and research, at a much higher price point.
Can channels, memory, or modulation options be added?
Some generators allow added channels, extended arbitrary memory, or modulation/sequencing options. Included options raise a unit's value since they're costly separately.
Do you buy non-working or out-of-calibration generators?
Yes. We purchase units as-is, including out-of-cal and partially working instruments. Note the condition when you request a quote so we can price it accurately.
Why buy refurbished instead of new?
Refurbished generators typically cost 40-70% less than new with identical performance on mature designs. Every unit is tested and verified, and calibration can be arranged.
Don't see your model listed?
The test equipment catalog is massive. We trade, buy, and sell thousands of unlisted models from Keysight, Tektronix, Rohde & Schwarz, and other manufacturers. Tell us what you need and our sourcing team will find it.
We Buy Surplus Function Generators Nationwide
Turn your retired, underutilized, or surplus equipment into working capital. We purchase single units as well as entire lab liquidations. Fast offers, immediate payments, and we coordinate all freight logistics.