... communication, time and frequency synchronization, and other fields.2. Technical specification2.1 GPS module Receive frequency: 1575. ... 42MHz Acquisition time: <2 minute 1PPS output accuracy: UTC(USNO): ±30 nS ... or 12.8/14.4/16.8MHz), sine wave, 2 channel, TTL level, 50Ω, MCX <1 x 10- ... IRIG-A(AC,DC) optional), NASA 36, 2 channel, RS422, accuracy <1us;IRIG-B(AC) time code ...