GPS disciplined Rubidium standard based on SPECTRATIME GRCLOK-1500

GPS disciplined Rubidium standard based on SPECTRATIME GRCLOK-1500, with GPS antenna and power adapter;in timing domain, SPECTRATIME GRCLOK-1500 is the best, most accurate, minimum jitter, no obvious design defect Rubudium clock you can afford;if you can the frequency domain (phase noise), please use another model: LNR-1500 (changed quartz to morion low phase noise OCXO), I have no such device in stock, but my friend may have;it is a GPS disciplined Rubidium standard, already calibrated by me, if you want to use it for 2-3 years, no need to do the calibration, and no need connect the GPS antenna, it is quite accurate, if you want to the calibration, just connect the GPS antenna for more than 24 hours, the system will store the offset value automatically, the offset will be stored in EEPROM, so will not lost even you power off the unit, this is the special design by Spectratime, no other vendor did it;I designed the house (shell) and interface board;the working consumption power about 12W, the top temperature of shell is 34 °C, bottom is 39 °C, envirement is 17 °C;3 LED, purple is power, sharp green is locked, blue is track/sync;2 SMA output, left one is 10MHz sine wave, right one is synchronized 1pps;for details of SPECTRATIME GRCLOK-1500, please use Google get its manual;the auction include:one Rubidium standard;one GPS antenna (panasonic, Trimble or Garmin);one Delta power adapter (12V, 3A)ship to US 48 states in free.I just have 8, will keep one for service part.https://www.ebay.com/itm/188081587013