Together with a signal generator (a Marconi 2032) I got my hands on an old (~2003) sattelite out door unit. These rugged units – the case itself probably weighs like 10 kg – are usually… Weiterlesen »Teardown of a KA-Band sattelite transceiver out-door-unit (ODU)
While messing around with the HP 8720A I discovered a great free (for non commercial use) tool called METAS VNA Tools. This software suite offers a comprehensive array of tools for tracking various uncertainty contributors… Weiterlesen »VNA Calibration, Characterization and Uncertainties
I stepped on a good deal for a HP8720A VNA where the RIFA caps just died while testing the device on site at the seller. After replacing the capacitors the unit worked pretty well until… Weiterlesen »Teardown and Repair of a HP 8720A Vector Network Analyzer
I entered an auction for two visually flawless Tektronix Type 109 pulse generators, though uncertain of their operational status. The Tektronix Type 109 Pulse Generator is a fast risetime pulse generator similar to the pulse… Weiterlesen »Tektronix Type 109
Deep into repairing the 2nd Advantest R3265A with the faulty power supply and replacing the 2nd LO with alternative parts, I’ve discovered an issue with my HP 8560A spectrum analyzer. Technical specifications & features The… Weiterlesen »HP 8560A Analysis and initial diagnosis steps
A good friend of mine saved this nice arbitrary function/waveform generator from the dumpster. He mentioned that presumably the output was overloaded with 230V line voltage.Upon powering it up it issued output overload. But allowing… Weiterlesen »Repair of Agilent 33220A
A few years ago, I purchased a spectrum analyzer manufactured by Advantest. The main reason for my purchase was its broad frequency range, spanning from 100 kHz to 8 GHz, and its EMI measurement capabilities.… Weiterlesen »Repair of Advantest R3265A Part 1
Building a high-speed Ethernet interface from scratch can be a challenging but rewarding experience. As a hardware enthusiast, I set out to design and assemble my own Ethernet card using the Microchip LAN7430 chip. After… Weiterlesen »Pallas Ethernet Adapter – First Prototype
In the past I designed a test board for transmission lines which had major flaws – not in the basic calculation of impedances but in the form and discontinuity of impedance at the transitions between… Weiterlesen »Pallas Ethernet Adapter
I think the topic I/Q modulation is damn interesting so I fiddelt a little bit around with the topic. I/Q modulation is the summing of two amplitude modulated 90° phase shifted signals. The experiments for… Weiterlesen »I/Q Modulation – Phase Splitter
