RFL Communications 21 Sub-MUX Manual do Utilizador descarregar pdf (Página 34)

©2014 RFL Electronics Inc.

Solutions for an evolving world.

©2014 RFL Electronics Inc.

Solutions for an evolving world.

Protective Relay

F

SHFI 850 NM (Short Haul Fiber Interface)

MUX or

Channel

Bank

Protective Relay

F

SHFI 850 NM (Short Haul Fiber Interface)

MUX or

Channel

Bank

Short Haul Fiber/MUX

• The MUX/CHBNK will have a Synchronous module w/SHFI

installed.

• Requires a single clock to operate

• The channels will operate at 64Kbps, this is many times

referred to as C37.94, which a standard defining the parameter

of the channel.

• This form can be determined by the type of fiber and the

connections. If the fiber terminates into a channel bank or

MUX it will be a SHF connection.

• Testing of the relay can be done via looping at any of the TX/RX

connections . But many times the SHFI will not have an

available clock and must use the clock of the MUX/CHBNK to

operate.

• In most cases Addressing is required for security, but if used it

will need to be disabled during loop testing.

Electrical, µwave

Radio or Fiber

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