Shenzhen Electronic Technology Co., Ltd. Newell GPS module has a cold start circuit board and gold, hot start and warm start (today's technology has basically the cold start and warm restart mode parameter has done two very close, so it phased out a warm start) three parameters, if the GPS module initial power, or move more than 500 km after power what is pcb, the module must be recalculated once ephemeris data, GPS module under normal circumstances only takes 30 seconds to normal position (this is a cold start), S-87 has a built-in button batteries, can be inside the module, when the next module can very quickly locate ephemeris data storage, such as S-87 is generally only 1 to 3 seconds The new location can be achieved, and that this position is called the hot start, if the module off time more than four hours a circuit board, there is no real-time internal RTC power, then again the boot is also equivalent to a cold start. Newell Shenzhen Electronic Technology Co., Ltd. GPS antenna signal transmission line is also very important to the circuit board substrate, including external feeders and PCB traces. Only when it may be the greatest power output impedance matching. Therefore, the entire transmission line to ensure high-frequency impedance 50Ω, how to design the PCB RF trace impedance, some small software can help you easily calculate. What is pcb | Shijiazhuang City board | Newell record provided by Shenzhen Electronic Technology Co., Ltd. Newell. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) strong, credible, in Shenzhen, Guangdong printed circuit board industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Newell invasive and you hand into the brilliant, for a better future!