3465&3485-mfc.ib.rev4.doc
page 10 of 22
17/10/2007
required for short cable lengths. Where the connected equipment has automatic equalisation (such as IRT DA’s and
converters) this is not required.
LK2
IN
DS3 shaped output for <225 feet, MFC-3485/45
OUT DS3 unshaped output for >225 feet, MFC-3485/45
Note: Leave out on MFC-3465/34 (34 Mb/s) version.
Alarm connections:
Alarm relay output (if fitted).
Closed contacts represent either a Loss of Input signal or Loss of Sync, selectable by link LK3, or Loss of Power.
MFC-3465
G.703 input:
This BNC input is terminated in 75 Ohms. Input cable compensation is automatic for up to 450 feet of 75 Ohm
coaxial cable (Belden 8281 equivalent). Input equalisation can be enabled or disabled by the addition or removal of
link LK2.
ASI output:
This BNC output has a 75 Ohms characteristic output impedance. Only high quality 75 Ohm coaxial cable (Belden
8281 or 1694A equivalent) should be used. No adjustments are required, but cable must be terminated in 75 Ohms
at the connected load.
Alarm connections:
Alarm relay output (if fitted).
Closed contacts represent either a Loss of Input signal or Loss of Sync, selectable by link LK3, or Loss of Power.
