Rohde & Schwarz FPC1500 5kHz – 3GHz Spectrum Analyzer Review, Teardown & Experiments

In this episode Shahriar reviews the newly released FPC1500 Spectrum Analyzer from Rohde & Schwarz. With this addition Rohde & Schwarz continues to aggressively target the entry level market across a wide range of instruments. These units are packed with competitive features some of which are not found in other instruments in the same class. The FPC1500 employs a 10.1″ WXGA LCD screes and a built-in tracking generator with a fully independent synthesizer which allows for offset tracking as well as a built-in VSWR bridge capable of making vector S11 measurements. These features combined with built-in WiFi, wide range of measurement capabilities and digital demodulation of ASK/FSK signals provides a competitive product.

This comprehensive review is organized as follows:

00:01:35 – R&S Spectrum Analyzer model overview
00:02:25 – Front and back panel, GUI initial look
00:06:24 – Complete teardown with digital and RF deck analysis
00:19:11 – DUT device overview and specifications
00:20:00 – DUT power on, FPC overload test, single tone, phase-noise and pre-amplifier performance
00:29:41 – TOI measurement capability and multi-tone inter-modulation performance
00:35:07 – Internal source performance, THD measurement, tracking generator and offset-tracking
00:41:55 – Scaler S21 configuration, DUT gain and bandwidth measurement
00:46:08 – DUT Noise-figure measurement and marker functions capability
00:48:57 – DUT variable gain control characterization, AM demodulation, VGA bandwidth and waveform display
00:57:39 – Digital demodulation of FSK/ASK with multilevel frequency shifting, eye-diagram display and analysis
01:01:13 – Vector S11 measurement, web interface, smith chart display and return loss characterization
01:04:45 – Spectrogram measurement, replay mode and trace storage
01:06:55 – Concluding remarks

Rohde & Schwarz ZNLE 1MHz – 6GHz Vector Network Analyzer Review, Teardown & Experiments

In this episode Shahriar reviews the Rohde & Schwarz ZNLE 1MHz – 6GHz Vector Network Analyzer. The ZNLE is the economy model of the ZNL 3-in-1 instrument. The R&S ZNLE is a two-port vector network analyzer that can be used for bidirectional measurements of S-parameters S11, S21, S12 and S22 on passive components. Ordering the RR&S ZNLE requires only two decisions: the frequency range and whether or not you need a GPIB interface. The analyzer is available with a frequency range of 1 MHz to 3 GHz (R&S ZNLE3) or 1 MHz to 6 GHz (R&S ZNLE6). The optional GPIB interface lets you connect a controller to remotely control the R&S ZNLE. As a standalone instrument, the R&S ZNLE does not require an external PC to configure the setup. You can start measuring immediately after you switch on the instrument.

The review is organized as follows:

01:12 – Model comparison and overview.
02:24 – Instrument overview and design.
06:29 – Brief teardown and internal construction.
09:31 – Electronic Calibration Unit and auto-cal procedure.
17:39 – Measurement and characterization of a tunable microwave filter.
30:47 – Measurement of a tunable phase shifter.
33:16 – Analysis and measurement of a trice coupled quad-patch antenna module.
39:10 – Performance and characterization of an ZNLE internal synthesizer.
46:31 – Mixed-mode S-Parameter measurements using the ZNLE.
49:15 – Extreme dynamic range measurements using a 0.1dB step electromechanical attenuator.
1:02:48 – Overview of additional functions.
1:04:26 – Concluding remarks.

R&S RTB2004 Giveaway, Q/A, Patreon & Other Discussions (December 2017)

n this episode Shahriar reveals the winner of the R&S scope giveaway. Congratulations Samuel Edmunds for winning the R&S RTB2004 oscilloscope! Other topics such as broken equipment purchases, Patreon goals and rewards are also discussed.

Rohde & Schwarz RTB2004 10-Bit, 2.5GS/s MSO Oscilloscope Review, Teardown & Experiments

In this episode Shahriar reviews the Rohde & Shwarz RTB2004 10-Bit oscilloscope. With its high-resolution touch-screen, intuitive and capable GUI as well as excellent analog/digital performance this scope competes very well against other 2000 series instruments from Tektronix and Keysight. This extensive review includes instrument teardown, overview and dedicated experiments as follows:

01:17 – Model comparison and R&S scope lineup.
02:20 – Front panel, rear panel and overview.
05:01 – Instrument teardown and analysis.
13:37 – Power on and basic functions including intensity grading, XY mode.
26:29 – Multi-tone behavior, FFT and ADC performance.
33:17 – Experiment with ambient light follower: Analog and RS232 digital serial capture, triggering and analysis.
48:03 – Experiment with external DAC: Analog and I2C data capture and search using remote web interface.
57:19 – Built-in arbitrary waveform generator behavior and performance.

Teardown, Repair & Calibration of a BK Precision 9185 DC – 600V Linear Power Supply

In this episode Shahriar repairs a BK Precision 9185 600V linear power supply. The instrument is missing a power connector and therefore cannot be powered on. To be cautious, the unit is disassembled first before being retrofitted with a new connector. The teardown reveals damaged resistors at the back of the main power supply PCB. The damage points to a defective high-voltage MOSFET. This transistor is one of six devices in parallel. The impacted components are all replaced before the unit is retrofitted with a new power connector.

After power on the unit is verified for proper operation. Using a Keithley DMM7510, the power supply is calibrated and is ready for future experiments.

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