8
Overview
MB-750D-H and MB-750D-H/40 Installation Manual
Figure 5 illustrates the amplifier module with the cover partially cut away to show the location
of major components.
Figure 5
Forward amplifier module
Models MBD-SPLT and MBD-DC
One amplifier path in the MB-750D-H* is dedicated to port two as shown in Figure 1. The other
path can be used to feed either port three or four by appropriate installation of the furnished
MBD-JMP jumper. Port numbers are marked on the housing ends, just above the connectors, as
illustrated in Figure 2. The model MBD-SPLT splitter and model MBD-DC, which is a 10 dB
directional coupler, are available to provide outputs at ports three and four. The MBD-SPLT
provides equal output levels, while the MBD-DC provides one high level port and one low level
port. The MBD-DC may be installed to provide the high level signal to either port three or to
port four.
Return Signal Path
The MB-750D-H* amplifier can be equipped to pass signals in the return or upstream direction
by installing the RA-Kit/40/L return amplifier kit. Model DF1-SS input and output
bandsplitting filters are factory installed in the MB-750D-H. Model DF1-SS/40 bandsplitting
filters are furnished with the MB-750D-H/40 amplifier and isolate the forward and return signal
paths. The return amplifier kit includes a return amplifier hybrid and a selection of cable
equalizers and jumpers to compensate for cable lengths with sub-split, 40 MHz split or European
split systems.
Signal level control is provided through model JXP-*A attenuators. Return attenuators may be
installed at both the input and the output of the return amplifier, as needed. The input
