Signal Generators — Buy & Sell Used Signal Generators
Analog and vector signal generators from kHz to millimeter-wave. We buy surplus sources from labs, integrators, and calibration houses nationwide, and we sell tested units at well below list. Quote any model below in under a minute.
Available Models & Sourcing Catalog
We buy and sell tested, verified-working used signal 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 | N5181A MXG | Analog, up to 6 GHz | |
| Keysight / Agilent | N5181B MXG | Analog, up to 6 GHz | |
| Keysight / Agilent | N5182A MXG | Vector, up to 6 GHz | |
| Keysight / Agilent | N5182B MXG | Vector, up to 6 GHz | |
| Keysight / Agilent | N5183B MXG | Microwave, up to 40 GHz | |
| Keysight / Agilent | N5171B EXG | Analog, up to 6 GHz | |
| Keysight / Agilent | N5172B EXG | Vector, up to 6 GHz | |
| Keysight / Agilent | E8257D PSG | Analog, up to 67 GHz | |
| Keysight / Agilent | E8267D PSG | Vector, up to 44 GHz | |
| Keysight / Agilent | E4438C ESG | Vector, up to 6 GHz | |
| Keysight / Agilent | E4437B ESG | Vector, 4 GHz | |
| Keysight / Agilent | 8648C | 9 kHz-3.2 GHz | |
| Keysight / Agilent | 8657B | 100 kHz-2060 MHz | |
| Keysight / Agilent | 83712B | Synthesized CW, 20 GHz | |
| Keysight / Agilent | 83650B | Swept synthesizer, 50 GHz | |
| Keysight / Agilent | 8340B | Synthesized sweeper, 26.5 GHz | |
| Rohde & Schwarz | SMW200A | Vector, up to 44 GHz | |
| Rohde & Schwarz | SMBV100A | Vector, up to 6 GHz | |
| Rohde & Schwarz | SMBV100B | Vector, up to 6 GHz | |
| Rohde & Schwarz | SMB100A | Analog, up to 40 GHz | |
| Rohde & Schwarz | SMA100A | Analog, up to 6 GHz | |
| Rohde & Schwarz | SMA100B | Analog, up to 67 GHz | |
| Rohde & Schwarz | SMF100A | Microwave, up to 43.5 GHz | |
| Rohde & Schwarz | SMC100A | Analog, up to 3.2 GHz | |
| Anritsu | MG3692C | 0.1 Hz-20 GHz | |
| Anritsu | MG3694C | 0.1 Hz-40 GHz | |
| Anritsu | MG3710A | Vector, dual RF | |
| Aeroflex / IFR | 2023A | 9 kHz-1.2 GHz | |
| Aeroflex / IFR | 3416 | 250 kHz-6 GHz digital | |
| Stanford Research | SG384 | DC-4 GHz | |
| Stanford Research | SG386 | DC-6 GHz | |
| Berkeley Nucleonics | Model 845 | Microwave, up to 26.5 GHz | |
| Tektronix | TSG4104A | Vector, 4 GHz |
Signal Generators Buying Guide
Signal generators split first into analog and vector types, and that choice drives everything else. An analog generator produces CW and basic AM/FM/phase modulation; a vector generator adds wideband I/Q and digital modulation for cellular, radar, and complex waveforms. Beyond type, the key specs are frequency range, output power range, spectral purity (phase noise and harmonics), and — for vector units — modulation bandwidth. Match frequency and power to your device under test, and pay close attention to phase noise if you're testing receivers or doing close-in measurements.
On the used market, installed frequency range and modulation options dominate value. Keysight's MXG/EXG/PSG/UXG families and R&S SMW/SMB/SMA generators commonly license top frequency, modulation bandwidth, and signal personalities (LTE, 5G NR, radar, GNSS) as keys, so a vector generator's worth is largely the sum of its installed baseband and digital-modulation options. Hardware options like high output power, low phase noise, and additional baseband generators add further value. List the enabled options when you request a quote; a current calibration certificate commands a premium.
Refurbished generators typically save 40-70% off list with identical performance on mature designs. Mid-range analog and vector units (Keysight MXG/EXG, R&S SMB) offer strong value, while flagship vector sources like the PSG and SMW carry six-figure new prices. Whether you're sourcing a unit or retiring one, send us the model and its options and we'll quote within one business day.
Frequently Asked Questions
How much is my used signal generator worth?
Value is set mainly by the model, installed frequency range and modulation options, and calibration status. Send us the model and a list of enabled options and we'll return a fair-market offer within one business day.
What's the difference between an analog and a vector signal generator?
An analog generator produces CW and basic analog modulation (AM/FM/PM). A vector generator adds wideband I/Q and digital modulation for standards like LTE, 5G NR, and radar. Vector units are more capable and their value depends heavily on installed baseband and signal-format options.
Can I add frequency range or modulation formats after purchase?
On many modern generators, yes — frequency, modulation bandwidth, and signal personalities are often software-licensed keys that can be added later, which also raises the value of a higher-licensed used unit.
Do you buy non-working or out-of-calibration signal generators?
Yes. We purchase units as-is, including out-of-cal and partially working instruments. Describe 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 Signal 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.