In this episode Shahriar troubleshoots a defective Agilent N9020A 8.4GHz spectrum analyzer. The instrument reports LO Unlock and refuses to perform any sweep at all. The complete block diagram of the instrument is presented with focus on the LO generation blocks.
The teardown of the instrument reveals the individual assemblies presented during the block diagram overview. After a few measurements, it is concluded that the LO Synthesizer module is faulty. The module is presented in detail and various components and signal paths are identified. Extensive measurements are carried out until the fault is traced to problems in the varactor bank of the main VCO. After the component replacement, the instrument is fully functional. The X-Ray of the synthesizer module is also presented during the repair.
In this episode Shahriar reviews the new Tektronix AFG31000 Arbitrary Function Generator. The AFG31000 series with InstaView™ technology is the first high-performance AFG with built-in waveform generation applications, patented real-time wave monitoring, and a modern user interface. The instrument is capable of 2GS/s waveform generation up to 250MHz and 14-bits of vertical resolution. This review is organized as follows:
00:08 – Introductions
01:01 – Front panel, rear panel and instrument design
03:44 – Detailed teardown, analysis, architecture and components
17:30 – GUI overview and basic functions
20:25 – Broadband FM modulation experiments
23:55 – InstaView experiments with a non-linear impedance
35:38 – Equation editor, waveform builder and advance sequencing
51:21 – Concluding remarks
In this episode Shahriar takes investigates the architecture and benefits of a precision sub-sampling wide-bandwidth oscilloscope. The teardown of the Agilent DCA instrument reveals a PC core combined with the acquisition board. The instrument without any plug-in modules does not perform any exciting tasks.
A 20GHz sampling module from eBay is available. However, the unit does not have an front connectors. New connectors are sourced from an old timing module and the sampling head is back to working condition. In order to test the unit, an Optellent OBP-04×10 4-channel pattern generator and error counter is used. The teardown of the unit reveals a simple design built around several transceiver ICs. The comparison between the sub-sampling scope and a real-time scope is also presented alongside measured results from the DCA.
In this episode Shahriar reviews the Keithley DAQ6510 6.5-Digit Data Acquisition & Multimeter. The instrument offers a new level of simplicity. The DAQ6510 has a touchscreen user interface that enables faster setup time, real time monitoring of test status, and detailed data analysis on the instrument. This review is organized as follows:
00:08 – Introductions
01:57 – Instrument specification and datasheet
03:06 – Unit overview & design
05:41 – DAQ6510 teardown and analysis
11:39 – Keithley 7700 acquisition module teardown
16:38 – Power on and GUI overview
18:29 – Component binning experiment with advanced triggering
28:31 – Analyzing DC-DC converter behavior at 1MS/s
32:06 – Thermal monitoring and modeling using DAQ6510
42:35 – KickStart PC software capabilities
45:43 – DAQ6510 buit-in App ecosystem
48:00 – Concluding remarks
In this episode Shahriar presents an overview of a small portion of the vendors present on the exhibition floor at the International Microwave Symposium 2019. The IEEE MTT International Microwave Symposium (IMS) is the premier annual international meeting for technologists involved in all aspects of microwave theory and practice. It consists of a full week of events, including technical paper presentations, workshops, and tutorials, as well as numerous social events and networking opportunities. The symposium also hosts a large commercial exhibition. Co-located with IMS are the IEEE RFIC, IMBioC and ARFTG conferences.
The Signal Path (TSP) is an electrical engineering video blog for industry professionals, students and hobbyists. TSP is a non-for-profit website dedicated to provide free education spanning a wide range of electrical engineering topics. Equipment reviews, tutorials and repair videos are posted regularly.