Achieving quality audio testing for mobile phones
Jan 1, 2006
By Joey Tun The audio capabilities of a cellular handset provide the fundamental interface between the user and the radio receiver. Just as RF testing must be performed in a controlled environment, large-scale production testing of the mobile phones require special acoustical tests....
Phase-Noise Profiles Aid System Testing
Nov 1, 2005
By Ken Yang Engineers normally try to
minimize phase noise, but for test purposes, they sometimes
worsen the phase noise intentionally. The deliberate introduction of phase noise
aids in testing a system's tolerance for phase noise or jitter....
A general measurement technique for determining RF immunity
Oct 1, 2005
By Arpit Mehta This article describes a generalized technique to measure the RF
immunity of a circuit. It defines a standard and structured test methodology
aimed at establishing adequate repeatability of the test results for
qualitative analysis....
Goodbye ESN, hello MEID: MEID as a solution to ESN exhaustion
Sep 1, 2005
By Mike Keeley Electronic serial numbers have served CDMA
and other wireless technologies well, providing a mechanism to uniquely identify
each mobile device. But the impending exhaustion of available ESNs necessitates a
replacement. That replacement is the mobile equipment identifier....
Arbitrary/function generator combines three products into one
Aug 1, 2005
Implementing a 0.18-micron CMOS-based generator-on-a-chip ASIC device, Tektronix has readied a new family of arbitrary/function generators that establishes a new benchmark in performance and ease of use. ...
In context--Internal zero and calibration for RF power sensors
Jun 1, 2005
By Alan B. Anderson The primary use of an RF power sensor and RF power meter combination is to add traceability and accuracy to test systems and for making accurate, absolute...
Probing signals at 13 GHz
Jun 1, 2005
By Lon Hintze Lon Hintze previews the types of available probing solutions, the trade offs between them and the practical considerations for ensuring high signal fidelity and accurate measurements....
Increasing the speed of testing GSM/EDGE mobile phone power amplifiers
May 1, 2005
By Roland Minihold, Rohde & Schwarz Munich, Germany Testing is one of the critical operations necessary to ensure that GSM/EDGE mobile phones meet their required specifications. Consequently, reducing this...
Digital oscilloscopes feature 100 GHz bandwidth
Mar 1, 2005
New sampling techniques permit LeCroy Corp.'s new digital oscilloscopes, WaveExpert 9000 and SDA 100G, to offer unprecedented 100 GHz bandwidth....
Detecting interfering signals and mitigating them
Jan 1, 2005
By Steve Thomas Interfering signals close to a carrier can be sources of interference that are
difficult to detect. Field technicians must be able to identify and mitigate such
interfering signals that can be less than 1 kHz apart and have a 60 dB difference
in amplitude. The article discusses the type of performance necessary in a test
instrument in order to identify interfering signals and track them down to their
sources....
Synthetic instruments in automatic test systems
Nov 1, 2004
By John Stratton This article will describe why there is a move toward synthetic instrument ATS architecture, how synthetic instrument architecture will differ from that of a stand-alone instrument, and how it is possible to achieve high-performance measurements in a synthetic instrument framework....
