In Days of Old
Surrounded by History
by Dan Wiswell Many years ago, I worked in a building in Boston that had a plaque on an outside wall that commemorated the invention of the telephone by Alexander Graham Bell. Passing by it […]
Year: 2025
Automation Corner
The Problems with Hardware Emulation Modes
Let me start with “I hate it!” It is okay for simple tasks, but calibration and metrology is not a simple task. Often, what we do in automation is very complex—getting into the low-level settings […]
News
In-situ rotary table calibration – PTB.de
PTB-News 3.2024 – The deviations of rotary tables can be directly measured on coordinate measuring machines (CMMs) in all six degrees of freedom by means of a self-calibrating procedure using a ball plate. A new […]
Archives
A New Direct Comparison Calibrator for RF Power Sensors
by Michael Eckart Wireless products are everywhere. From wireless communications devices to children’s toys to military weapons systems, more and more products are using radio frequencies (RF) (100 kHz to 1 GHz) and microwaves (1 […]
Archives
Statistical Analysis of Network Analyzer Measurements
by John Juroshek, C.M. Wang, George McCabe For the past five years, the Automatice RF Techniques Group (ARFTG) has conducted a measurement comparison program for vector network analyzers. The results of those measurements varies substantially, […]
Archives
RF/Microwave Coaxial Connector Care
by Curtis Moss & Greg Miller An RF/Microwave measurement is only as good as the connections made in that measurement. Cleanliness and careful handling of RF/Microwave coaxial connectors are critical for making repeatable and reliable […]