User guide

August 2001 199
Connecting Boards in an H.100 bus
Configuring the H.100 Clock
You can connect an H.100 compliant board to either the MVIP
or H.100 bus. You set the clocks differently depending on which
bus your board is connected to.
Boards connected in an H.100 bus use two primary clocks to
synchronize frames. These are the A clock and the B clock. The
H.100 bus also provides NETREF to synchronize boards with a
digital interface to the network. Since the H.100 compliant
boards do not have a digital interface, you can not set the
NETREF clock for those boards.
In an H.100 bus, one board drives the A clock, another board
drives the B clock, and all other boards take the clock from
either A or B.