... time zones,strong anti-interference 1. Model TF1581 GPS Time Synchronizer, developed based on European time-frequency ... time synchronization.2. The design of Model TF1581 GPS Time Synchronizer takes into full consideration the diversity of ... x 4, 1PPM x 8, RS-232 x 1, RS-422 x 1, IRIG-B/AC x 1,IRIG-B/DC x 2 , NTP x ... 1 ,PPS(TTL) x 1, ALARM x 1. GPS Time ...