• Highly accurate wideband noise source covers all common microwave link IFs
• Tracking mode maintains constant C/N ratio under carrier fading conditions
• Broadband interference facility, with or without noise injection, stresses the radio deterministically
• Option -001 changes Signal Connectors to 50 ohm Impedance

The HP 3708A Noise and Interface Test Set offers an accurate, yet simple, method of simulating microwave radio fade conditions. Designed for operation in the IF section of a digital or FM microwave radio, with addition of calibrated levels of white noise and/or interference signals to the radio IF carrier. A built-in power meter and microprocessor control enables the radio IF carrier power to be sampled at the point of noise injection and the noise density adjusted automatically to maintain a constant carrier level variations. A simple, yet powerful interference test facility is also included, allowing an external broadband signal to be mixed with the radio IF carrier along with/instead of the injected noise. Additional capability provided within the instrument includes

• True RMS IF power meter
• High stability 0 dBm reference tone
• Direct noise bandwidth measurement