Description
The NAMC-PTM holds all the logic that is needed to receive a clock or a pulse from a GPS receiver or the other MCH. The detection and the quality rating of these signals can also be done on the NAMC-PTM. In this scenario the NAT-MCH clock module is only used to buffer the generated clock signals and to distribute them to all AMCs via the backplane clocks.
The first of the two NAMC-PTMs is capable of generating and providing two reference signals (e.g. 1pps and 120MHz) to the first MCH via CLK1-RX and CLK3-RX using its local TCLKA/B lines. The MCH will send these clocks to all other AMC, arriving at their TCLKA and TCLKB. The MCH sends also these clocks to the redundant NAMC-PTM via CLK1-TX and CLK3-TX arriving at the PTM at TCLKC/D.
The second NAMC-PTM receives the clocks from the first NAMC-PTM via its TCLKC and TCLKD. It can decide at any time if it generates its clock locked to these clocks or locked to its own GPS reference.
Author
Mr
Heiko Körte
(N.A.T.)
Co-author
Mr
Vollrath Dirksen
(N.A.T. GmbH)
