Noise Com of Parsippany, New Jersey, has released an E911 Noise and Interference Generator for testing susceptibility to interference of E911 applications on cellular phones, as well as GPS receivers used in airborne, automotive, defense and mobile locations.

The instrument is based on digital noise, arbitrary wave-form, and proprietary switching technology, enabling a reported on/off ratio of 164.5dB. The product can generate low-phase noise, high-power out-of-band interference without obscuring signals in the GPS band, thereby isolating the GPS receiver from their effects. Out-of-band interference signals tune from 800 MHz to 2500 MHz, allowing engineers to emulate interference coming from cellular, PCS, 3G, Bluetooth, and WLAN frequencies.

The generator has one (or optionally two) independent arbitrary waveform generators capable of 40MHz bandwidth for interference generation over the L1 and L2 or L5 bands. Any waveform can be generated, including sine waves and noise, pulsed at any duty cycle between 0 and 100 percent at 6.67 nanoseconds resolution. It allows engineers to simultaneously test GPS receiver operation in L1 and L2 or L5 frequencies.

The generator supports three operation modes: continuous wave (CW) synthesized, arbitrary interference including broadband Gaussian noise, and pulse mode for burst and TDMA emulations.