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CXR Larus 80-100-400 Issue 2 July 2006 page
3-28
Recovered clock from 54513-5 input cards, nominal 10 MHz, tracks within ± 46
Hz.
g. Serial Data Input from transceivers on corresponding input card.
h. Transceiver Select lines from the other track and hold card.
i. Weak RF downlink signal from GPS satellites hitting the rooftop antenna. This
spread spectrum signal has a frequency of approximately 1.57 GHz at an
amplitude of approximately -135 dBm. The signal is delivered via coaxial cable
to the GPS receiver circuit on the 54591 card.