new Trimble M48 GPS for Fei Zyfer 565 standard, sensitivity increased 20 dB

new Trimble M48 GPS for Fei Zyfer GPStarplus 565 standard (firmware is V1.0.9), increase the receiving sensitivity more than 20 dB, if you are using Fei Zyfer 565 with V1.0.8 FW, please upgrade the firmware to V1.0.9 (I can send the firmware file to you, if you need the firmware chip, please add 10 USD), 

please be aware is is NOT a Motorola M12 compatible GPS receiver, just the interface is, so, you can not use it in Symmetricom S100, S200, S250, S300, S350, XLi etc. just used it in Fei-Zyfer GPStarplus 565 time frequency system GPSDO.