Teardown & Repair of a Rohde & Schwarz SMBV100A 9kHz – 3.2GHz Vector Signal Generator



In this episode Shahriar takes a look at a R&S SMBV100A Vector Signal Generator which does not produce the correct output level. Despite passing all self-tests and ALC checks, the output power level is far below expectation. The output also shows a high-pass frequency response.
The (heavily simplified) block diagram of the instrument is examined and discussed. The teardown of the unit reveals the output RF board which is presented in details. Since the instrument cannot detect the failure internally, it is very likely that the fault is part of the RPP output RF relay.
The circuitry as well as the datasheet of the components are examined. Measurements show that the output RF relay is never activated due to a faulty PMOS transistor. After transistor is replaced, the unit shows the correct output level.
The baseband generator functionality is also verified. You can purchase the Metabo HPT (Hitachi) Cordless Screwdriver Kit from my Amazon Affiliate Link. Equipment Repair, Experiments, Teardown Experiments, Parts, RF, Teardown Social Media Archives Archives Select Month March 2020  (3) February 2020  (3) November 2019  (3) September 2019  (3) August 2019  (1) July 2019  (3) April 2019  (2) March 2019  (6) January 2019  (2) November 2018  (5) September 2018  (3) August 2018  (4) July 2018  (3) May 2018  (1) April 2018  (2) February 2018  (2) December 2017  (3) November 2017  (1) October 2017  (4) September 2017  (7) July 2017  (1) June 2017  (1) May 2017  (4) March 2017  (4) February 2017  (4) January 2017  (5) October 2016  (1) September 2016  (6) March 2016  (4) January 2016  (4) December 2015  (3) November 2015  (3) September 2015  (2) August 2015  (4) July 2015  (4) June 2015  (2) May 2015  (2) April 2015  (2) February 2015  (4) January 2015  (2) December 2014  (2) November 2014  (3) October 2014  (3) September 2014  (1) August 2014  (1) July 2014  (2) March 2014  (2) August 2013  (1) July 2013  (2) March 2013  (1) February 2013  (1) January 2013  (2) December 2012  (1) November 2012  (3) October 2012  (1) September 2012  (1) July 2012  (3) June 2012  (2) February 2012  (1) October 2011  (1) September 2011  (1) August 2011  (3) June 2011  (1) May 2011  (2).

Yorumlar

Yorum Gönder

Bu blogdaki popüler yayınlar

Siglent SVA1032X 3.2GHz Spectrum & Vector Network Analyzer Review, Teardown & Experiments

Resim
In this episode Shahriar reviews the newly released Siglent SVA1032X. The SVA series instrument spectrum & vector network analyzers are powerful and flexible tools for broadcast and RF device / system testing. With a wide frequency range covering 9 kHz to 3.2 GHz, the analyzer delivers reliable automatic measurements and plenty of features including a tracking generator and multiple modes of operation. This review is organized as follows: 00:09 – Introduction and instrument overview 02:25 – Complete teardown and detailed analysis of the instrument hardware 23:36 – Basic instrument GUI operation and overload detection limitations 28:38 – Tracking generator signal purity and performance 30:06 – Instrument internal phase noise performance 33:01 – VNA operation and amplifier impedance tuning experiment 39:28 – Amplifier characterization using built-in functions 44:20 – Digital demodulation experiments 49:30 – Distance to fault experiments using built-in functions 49:16 – Conc...
Devamı

Keithley DAQ6510 6.5-Digit Data Acquisition & Multimeter Review, Teardown & Experiments

Resim
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 Equipment Review, Experiments, Teardown Analog, Experiments, Parts, Review, Teardown Social Media Archives Archives Select Month Novem...
Devamı

Teardown & Repair of an Agilent N9020A MXA 10Hz – 26.5GHz Spectrum Analyzer (March 2020)

Resim
In this episode Shahriar takes a look at a malfunctioning Agilent N9020A MXA. This instrument was provided by AllTest who hold the largest inventory of used and refurbished instruments. They have trusted The Signal Path to attempt a repair on the instrument and to support the educational content of this channel. Thank you AllTest! Please visit their website for all your measurement, calibration and service needs: sales@alltest.net https://alltestchambers.net https:/alltest. net The instrument fails RF Alignment despite the fact that all calibration signals are present and can be viewed on the unit. The front-end attenuators also appear to be fully functioning. A full sweep of the input shows that the instrument fails to make measurements between 8. 4GH – 14GHz as well as above 17GHz. The block diagram is analyzed and the likely fault is traced to a doubler circuit on the A13 RF Assembly. The teardown of the assembly along with step-by-step reverse engineering is presented. An X-R...
Devamı