ETS-Lindgren’s AMS-8000 system supports fully automated A-GPS receiver performance testing per Version 3.0 of the CTIA’s Test Plan for Mobile Station Over the Air Performance. Instrumentation options are available to support A-GPS testing of GSM/UMTS and/or CDMA devices.

A new receive signal strength (RSS) based test method uses the A-GPS carrier-to-noise ratio (C/N0) reported from the mobile device to determine its receive radiation pattern. An RSS linearization step is then performed to “calibrate” the reported signal strength and correct the pattern shape. Finally, an effective isotropic sensitivity search is performed at a single point on the pattern and normalized with the remaining pattern data to produce a full TIS pattern.

The provided EMQuest™ EMQ-100 Antenna Measurement Software also performs the Intermediate Channel Degradation test required to determine the effect of the cellular radio transmissions on the GPS receiver sensitivity. Measured performance parameters for A-GPS include TIS, Upper Hemisphere Isotropic Sensitivity (UHIS) and Partial Isotropic GPS Sensitivity (PIGS).

AMS-8000 systems include an anechoic chamber, device under test (DUT) positioning equipment, measurement and communication antenna, instrumentation, and EMQuest automated measurement software. Customers may also obtain optional audit assistance for their ISO 17025 and certification program audits.