Technical Support

Comprehensive technical documentation is available for Dapu timing and RF products including datasheets with electrical specifications and performance curves, application notes for specific use cases, reference designs with schematics and BOMs, layout guidelines for optimal performance, reliability reports and qualification data, and phase noise and jitter measurement reports. Documentation is available through our distribution channel to registered customers. We also provide simulation models (S-parameters, SPICE) for RF components and timing devices upon request.

Contact our technical team to access documentation and discuss your specific information needs.

FAE support is available through our distribution channel as an authorized Dapu distributor. Our support services include product selection guidance based on your specifications, schematic and layout review, matching network design for RF components, PLL loop filter design assistance, phase noise and jitter analysis, and troubleshooting support. You can contact our FAE team through email, phone, or scheduled meetings. For complex projects, on-site support can be arranged. Priority support is available for strategic customers with volume commitments.

Reach out to our sales team to establish a support relationship and connect with our FAE engineers.

We provide extensive design resources for Dapu timing products including oscillator selection guides, PLL design application notes, layout guidelines for minimal jitter, matching circuit recommendations, power supply filtering guidelines, and measurement techniques for phase noise and jitter. Reference designs are available for common applications including GPS timing, Ethernet clocking, and telecom synchronization. Our FAE team can provide personalized design reviews and recommendations based on your specific application requirements.

Access our design resources through the technical support portal or contact our FAE team for personalized guidance.

Yes, phase noise measurement data is available for Dapu timing products. We provide typical phase noise plots showing phase noise density vs. offset frequency, integrated phase jitter calculations for standard bandwidths, and phase noise measurements at different temperatures. For critical applications, we can provide device-specific phase noise measurements from factory test records. Contact our FAE team with your specific model numbers and measurement requirements. We can also provide guidance on phase noise measurement techniques and equipment requirements.

Contact our FAE team for phase noise data and measurement reports for specific Dapu products.

Custom frequency programming is available for Dapu oscillator products. The process involves submitting a custom frequency request with your required frequencies, quantities, and delivery timeline. Our team will review feasibility and provide quotation including any setup charges. Custom parts typically require 8-12 weeks lead time and minimum order quantities (usually 1K-10K pieces depending on frequency). Samples can be provided for qualification before production. Contact our sales team to initiate a custom frequency request and discuss your specific requirements.

Contact our sales team with your custom frequency requirements for feasibility review and quotation.

Yes, reference designs are available for GPS timing applications using Dapu components. The reference design includes a complete schematic with TCXO, SAW filter, and matching components, PCB layout recommendations for optimal performance, BOM with recommended part numbers, and performance data including sensitivity and TTFF measurements. The reference design can be adapted for different GPS chipsets and form factors. Contact our FAE team to request the GPS reference design package and discuss customization for your specific application.

Contact our FAE team to request GPS reference designs and application support.

Measuring oscillator jitter and phase noise requires specialized equipment including a phase noise analyzer or spectrum analyzer with phase noise measurement capability, high-quality reference oscillator with better phase noise than DUT, and proper test fixtures with good signal integrity. For jitter measurements, a high-bandwidth oscilloscope with jitter analysis software or a time interval analyzer is needed. Dapu provides application notes on measurement techniques. We can also provide guidance on interpreting measurement results and comparing against specifications. For critical qualifications, we recommend using calibrated test equipment and following industry-standard measurement procedures.

Use phase noise analyzer for phase noise, high-bandwidth scope for jitter. Contact us for measurement guidance.

Proper power supply filtering is critical for achieving specified phase noise and jitter performance. Recommended filtering includes a 10μF bulk capacitor near the oscillator power pin, a 0.1μF ceramic decoupling capacitor close to the device, and a ferrite bead in series with the power supply line for high-frequency noise isolation. For ultra-low jitter applications, consider using a dedicated low-noise LDO regulator. Avoid sharing power rails between oscillators and digital circuits. Keep power traces short and wide to minimize inductance. Our application notes provide detailed filtering recommendations for different performance grades.

Use 10μF + 0.1μF capacitors and ferrite bead. Contact us for ultra-low jitter power supply designs.