• W.J. Riley, "A DDS Clock Measurement Module" (2016 PTTI Paper).
• W.J. Riley, "A DDS Clock Measurement Module" (PowerPoint Presentation).
• W.J. Riley, "A PicoPak TCXO Measurement".
• W.J. Riley, "A PicoPak Test at 15 MHz".
• W.J. Riley, "A PostgreSQL Database for the PicoPak Clock Measurement Module".
• W.J. Riley, "Absolute Phase Measurements with the PicoPak Module".
• W.J. Riley, "Enumerating PicoPaks".
• W.J. Riley, "Multi-Channel Phase Measurements with a PicoPak Module".
• W.J. Riley, "Multiple Instances of the PicoPak Clock Measurement Module and Windows User Interface Program".
• W.J. Riley, "PicoAmp Brochure and Specifications".
• W.J. Riley, "PicoPak Accuracy".
• W.J. Riley, "PicoPak Brochure & Specifications".
• W.J. Riley, "PicoPak Commands Version 2".
• W.J. Riley, "PicoPak Cross-Correlation Test".
• W.J. Riley, "PicoPak Noise vs Signal Power".
• W.J. Riley, "DDS GRR Phase Modulation in the PicoPak Clock Measurement Module".
• W.J. Riley, "PicoPak Operating Hints".
• W.J. Riley, "PicoPak Phase and Frequency Tracking Dynamics".
• W.J. Riley, "PicoPak Phase Response".
• W.J. Riley, "PicoPak Quick Start Guide".
• W.J. Riley, "PicoPak Software Overview".
• W.J. Riley, "PicoPak TC".
• W.J. Riley, "PicoScan Clock Measurement System Test Setup".
• W.J. Riley, "Remote Operation and Monitoring of PicoPak Clock Measurement Modules via Splashtop".
• W.J. Riley, "Simultaneous PicoPak and TimePod Measurements of MTI 574 OCVCXO".
• W.J. Riley, "The PicoAmp Distribution Amplifier Module."
• W.J. Riley, "The PicoPak Clock Measurement Module".
• W.J. Riley, "The PicoPak DDS Clock Multiplier".
• W.J. Riley, "The PicoPak Family".
• W.J. Riley, "The PicoPak Lock Acquisition Process".
• W.J. Riley, "The PicoPak Virtual Serial Port USB Interface".
• W.J. Riley, "The PicoScan Quad RF Switch Module".
• W.J. Riley, "The PPConsole Program".
• W.J. Riley, "The PQConsole Program".
• W.J. Riley, "Trimming the PicoPak Signal Frequency Measurement".
• W.J. Riley, "Trimming the PicoPak uP Clock Frequency".
• W.J. Riley, "Updating The PicoPak Firmware".
• W.J. Riley, "A Web-Based PicoPak Monitor".
• W.J. Riley, "A Frequency Error Multiplier for the PicoPak".
• W.J. Riley, "The PicoMult Frequency Error Multiplier".
•   W.J. Riley, "Running PicoPak Software Under Linux".
• W.J. Riley, "A Python Program for the PicoPak and PicoPlus Clock Measurement Modules".
• W.J. Riley, "A Web-Based RPi PicoPak Monitor".  

The PicoPak clock measurement module is available commercially as the PTF 7510A Precision Measurement Module.