MB*/* Installation and Operation Manual
Section 2
Overview
The MB*/* is a dual-output amplifier while the MB*/S* is a single-output amplifier used in
CATV distribution systems. Both models accommodate installation of the optional return
amplifier to enable two-way signal flow. All models are high-gain, three-stage hybrid amplifers
designed to drive both a limited cascade and a local distribution system. The MB*/* is powered
by the 60/90 Vac cable supply and can be configured to pass this power to additional amplifiers
and line extenders.
The standard model MB*/* includes an amplifier module with an integrated power supply which
is normally furnished complete in the model MB-HSG housing as illustrated in Figure 2-1:
Figure 2-1
MB*/* — open
HI
LO
FTEC
AC TEST POINT
24 V TE ST POINT
MPPS-II
460132-001
NO USER SERVICAB LE
PARTS INSIDE
USE CAUTION WHEN MAKING
INTERNAL ADJUSTMENTS
WITH COVER REMOVED
VOLTAG ES IN E XCESS OF
300 VOLTS ARE PRESENT
UNDER COVER AND MAY
BE PRESENT FOR SEVERAL
MINUTES AFTER POWER
IS RE M OVED
SEE INSTALLATION MANUAL
FOR SERVICE
RTN
EQ
MDR
MB 87 S G
J
A
K
E
M
75
55
-20dB
H
L
REFER TO
MANUAL FOR
FUSE VALUES
IN
FUSE
PORT 3
POWER
CONTROL
STATUS
MONITOR
-20dB
JXP THERM
JXP
FUSE
JXP
IN
DRIVE
UNIT
MAN
3
4
BODE
TDU
ADU
MAN
JXP 2
JXP 3/4
-16dB
STATUS
MONITOR
INPU T
ADU
JXP
COMMON
H
L
-20dB
PORT 2
STATUS
MONITOR
OUTPUT
-20dB
FUSE
JXP
DU
JXP
HL
JXP 2
-20dB
I
C
S
I
C
S
-20dB
JXP 3/4
FUSE PORT 4
SSEMBLED IN MEXICO
CAUTION:
CONTAINS PARTS
AND ASSEMBLIE S
SUSCEPTIBLE TO
DAMAGE B Y
ELECTROSTATIC
DISCHARGE ( ES D)
FWD
EQ
ALIGN D OTS
Base
Lid