Check the listing for details. TinyPFA Portable Phase Frequency Analyzer 1MHz-290MHz with 4-inch Touch Screen. Condition: New. Listed at 61.69 USD. Description TinyPFA Portable Phase Frequency Analyzer 1MHz-290MHz for Measurement of Deviation with 4-inch Touch Screen Description: - TinyPFA is a phase frequency analyzer that can accurately measure the frequency and phase difference between signals applied to two input terminals. The input frequency can be any frequency between 1 MHz and 290 MHz. - A typical use is to measure the difference between two 10 MHz clocks. TinyPFA can display phase and frequency differences digitally, and display the relationship between measurement results and time in a graph. The measurement results can be stored on an SD card inserted into the SD card slot, or sent to a PC through USB, and programs such as TimeLab can be run for further display and processing. The phase and frequency measurement accuracy is better than 1e-12 per second. - Please note that the maximum frequency difference that can be displayed depends on the measurement time (Tau), which is approximately 200Hz/s. Therefore, for Tau of 1s, the maximum frequency difference is 200Hz. - TinyPFA is a portable battery powered device that uses a USB interface for charging and designed with a 4-inch display screen, making it very convenient to carry and operate. Precaution: - TinyPFA is based on the hardware of NanoVNA-H4 and runs customized software to measure small deviations between two signals with similar frequencies. If you already have NanoVNA-H4 and do not need tinyPFA for long-term measurement, you can use NanoVNA-H4 to brush in tinyPFA firmware and use it without the need for repeated purchases. - TinyPFA is not a frequency meter and its internal reference is inaccurate and unstable. It is only used for measuring the deviation of two signals with similar frequencies. It can be used to compare a signal with a very accurate reference signal. - TinyPFA is not a phase noise analyzer. - TinyPFA is only available for specific users who require very precise frequency analysis. Please read the relevant instructions on tinydevices.org to confirm if it is suitable for your use. We do not provide usage guidance. If you are unsure of the purpose of tinyPFA, please do not purchase it. - Instructions for use reference:Please contact us for it,thanks Specification: - ABS Case size: 133 x 75 x 18mm - Packaging size: 170 x 110 x 52mm - Kit weight: 330g Package Included: - 1 x TinyPFA Host - 2 x SMA Male to Male ALSR100 RF Cable (30cm) - 1 x Micro SD Card (inserted in the host) - 1 x Micro SD Card Reader - 1 x USB Type-C Data Cable - 1 x Touch Paddle Payment Terms 1. We accept PayPal,Payoneer,Visa Card,Google pay,Credit card etc. 2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. Shipping Terms 1. We will process the order within the handling time ,if you have any questions, please contact us via eBay message or email. 2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding. Return Terms If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days. We will guide you the returning process for replacement or refund. Custom Duties & Taxes 1. It is buyer's responsibility to cover the import duties, taxes.We do not charge any taxes and fees, and the possible taxes and fees will be collected by the platform or by third parties such as customs and carriers. 2. Please check with your country's customs office and inform us what/how much should declare before shipping. Feedback 1. Please kindly leave us a positive feedback and 5 star DSR if you satisfied with our product and service. Please feel free to contact us firstly if you have any problem with your order, we are responsible and credible seller and will solve the issue it for you asap. 2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.