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Summary of Contents for Picotest PerfectPulse J2154
- Page 1 J2154 PerfectPulse Differential TDR Documentation Version 2.0, 2021 Copyright © 2021 Picotest All Rights Reserved PerfectPulse is a registered trademark of Picotest.com...
- Page 2 Trademarks The Picotest logo is a trademark of Picotest Corp. “PerfectPulse” and the PerfectPulse logo are trademarks of Picotest Corp. All other brand and product names mentioned herein are used for identification purposes only and are registered trademarks, trademarks, or service marks of their respective holders.
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Page 3: Table Of Contents
Table of Contents Chapter 1 - Overview ...................... 4 Welcome ............................4 What’s Included ..........................7 Documentation and Support ......................7 Warranty ............................8 Calibration and Test Board ......................8 Chapter 2 – Introduction to the PerfectPulse® Signal Generator ......... 9 Introduction and TDR Usage ...................... -
Page 4: Chapter 1 - Overview
• All applications requiring a fast, precise edge • USB or battery powered • Includes 12GHz internal power splitter for TDR operation • Compatible with the Picotest P2104A 1-port and P2105A TDR probes, as well as other manufacturers’ 50 Ohms probes • Compatible with most oscilloscopes J2154A Applications and Usage •... - Page 5 Overview • Verify the integrity of cable crimps and connector launches • Measure PCB trace path rise/fall time and overshoot/undershoot • Supports cable and trace loss modeling • Troubleshoot clock jitter and crosstalk • Measure microwave filters • Test the frequency bandwidth, rise/fall time, and flatness of lab instruments and probes J2154A –...
- Page 6 Overview Figure 2: The J2154A can be connected to support TDR and Frequency Response functions, as well as Vector Network Analysis (VNA) functions (as detailed below).
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Page 7: What's Included
Overview What’s Included Your Picotest PerfectPulse J2154A Signal Generator includes the following: J2154A PerfectPulse Signal Generator and Carrying Case • TDR Demo board • BNC-SMA PDN cables • USB-C Power Cable • Figure 3: The J2154A comes with a test/demo board which has single and differential test traces with impedance changes at different distances. -
Page 8: Warranty
Overview Warranty Every Picotest product you buy from Picotest.com is backed by a 1-year manufacturer’s warranty. For warranty service or repair this product must be returned to a service facility designated by PICOTEST. Please contact your local service representative for further assistance. -
Page 9: Chapter 2 - Introduction To The Perfectpulse® Signal Generator
PerfectPulse® Fast Edge Signal Generator Chapter 2 – Introduction to the PerfectPulse® Signal Generator Introduction and TDR Usage The PerfectPulse TDR is a simple to use signal generator designed to support almost any test requirement that can utilize a fast (rising or falling) edge including all TDR applications. The device is completely self-contained, requiring only a 5V supply from any USB port, including USB battery packs. -
Page 10: Setting Up Tdr Usage
PerfectPulse® Fast Edge Signal Generator Setting Up TDR Usage For single-ended and differential mode TDR measurements, Connectors 1 and 3 connect to the oscilloscope channels, while connectors 2 and 4 connect to the probes. This is the native mode and most common mode of operation. These can be either single-ended or differential measurements. - Page 11 PerfectPulse® Fast Edge Signal Generator Figure 7: TDR response. The ringing on the left is the Gibbs phenomena, present because in this case the scope bandwidth (10GHz) is LESS than the TDR bandwidth (12GHz). As the scope becomes faster this ringing will disappear. The blip between M1 cursors is the P2105A probe launch.
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Page 12: Fra Operation
PerfectPulse® Fast Edge Signal Generator Figure 9: Capacitor ESL inductance measurement Figure 10: Connections for TDR operation. FRA Operation For the measurement of an oscilloscope probe, the voltage is measured at the tip of the probe, so that the 50 Ohm port resistance doesn’t damp the probe response. This is equivalent to measuring with a very low source impedance, such as that presented by a power supply. - Page 13 PerfectPulse® Fast Edge Signal Generator display the probe transfer function. These can be either single-ended or differential measurements. A math function provides the FFT of the derivative of the pulse. The result is an impulse that is flat response to the rise/fall time of the pulse (about 13GHz). Dividing the FFT at the “output”...
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Page 14: Vna Operation
PerfectPulse® Fast Edge Signal Generator VNA Operation For VNA (frequency domain) measurements the signal is measured prior to the 50 Ohm port resistance so that the output is 50 Ohm as required by S-parameters. This is accomplished by connecting the oscilloscope to connectors 2 and 4 and the probes to connectors 1 and 3. -
Page 15: Chapter 3 - Specification
PerfectPulse® Fast Edge Signal Generator Chapter 3 - Specification Specifications that are not defined to be guaranteed are typical and are published as general information to the user. The instrument should have warmed-up for at least 20 minutes and the environmental conditions should not exceed the unit's specified limits. J2154A PerfectPulse®... -
Page 16: Handling Information
PerfectPulse® Fast Edge Signal Generator Do not operate with suspected failures. Refer to qualified service personnel. Indoor use only. Do not operate in wet/damp environment. Keep product surfaces dry and clean. Do not operate the product in an explosive atmosphere. Handling Information Handle with care to avoid any injury.
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