Used specifically in audio and acoustics applications, a sweep generator — sometimes called a tone generator — is a specialized piece of equipment that varies the range of frequency outputs to take measurements. They're typically used along with sound level meters which test sound reproduction systems and some digital audio applications. Sweep generators are often confused with synthesizers, which generate musical audio signals. There are simple sweep generators used by hobbyists and inventors, but some highly specialized industries often rely on a pneumatic sweep generator which eliminates the need for electricity by relying on a reciprocating air filter which measures air velocity. And since there is no electromagnetic interference, some experts say the measurements are more accurate.

Consider the following to find the sweep generator suppliers that are right for your business:

1. Sweep generator suppliers of portable units

2. Leading sweep generator manufacturers

3. Refurbished sweep generator distributors

Action Steps
The best contacts and resources to help you get it done

Find portable sweep generator distributors online

If you're looking for convenience, look for portable sweep generators. They're ideal for both field and in-house applications and are usually no more than eight inches in length. Portable sweep generators, like traditional units, should work in both analog and digital applications and offer collaboration with Windows support programs for easy and accurate record keeping.

I recommend: Electronic Surplus offers a basic inventors sweep generator for a minimal investment. Signal Forge offers a portable sweep generator for a full range of diagnostics.

Stick to a name-brand sweep generator manufacturer

Brand recognition can be a great way to shop, especially if you're planning on investing in a particularly special unit. Go to sweep generator manufacturers for products the competition relies on for accuracy and durability.

I recommend: Bell Electronics carries the Hewlett Packard-manufactured Agilent line of sweep manufacturers. Byram Labs sells trusted B&K Precision model sweep generators.

Shop refurbished sweep generators and save big

Whether you're shopping for pneumatic sweep generators or the traditional variety, they can cost many thousands of dollars. If you shop refurbished, especially on sweep generators used for serious diagnostics, you could save thousands. And, most of the sweep generator distributor companies that offer refurbished units test them against the readings of brand new units for accuracy.

I recommend: A scientific marketplace, LabX often has a nice selection of refurbished and tested sweep generators. Bizi International and Value Tronics International also offer refurbished units with top-notch name brands like Agilent.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  If you're in the television repair business or are interested in restoring old radios for the antiques industry, sweep generators can mean the difference between reception and dead air. You can make audio and picture reception worse if you adjust the coils randomly without making a 'sweep' with a generator.