Defense Electronics October 2014 page S30

"The number of suppliers for military-grade RF/microwave signal generators is large, and includes ...April Instrument (www.aprilinstrument.com),..."

Microwaves & RF July 2001 page 112

"low-cost signal sources from April Instrument ( Sunnyvale, CA ) are designed as basic measurement tools for the test laboratory...."

Test & Measurement World June 1997 pg. 42-46

"This "economy" model finds use in the most basic applications, many of which are in classified government projects"

RF Design December 1996 pg. 72

"Signal generator guarantees output power of 10 dBm"

Electronic Design December 16, 1996 pg. 142

"MW Signal Generator includes FM input"

Applied Microwave & Wireless Nov/Dec 1996 pg. 57

"Low cost signal generator"

Test & Measurement World November 1996 pg 4-5

"New Product Alert...Basic GHz Generator is economical"

EDN June 6, 1991 pg. 232

"Handheld 2- to 8- GHz Signal Generator"