Overview; Figure 2-1 Mb*/* - Open - Motorola STARLINE SERIES 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
MB 87
75
55
IN
FUSE
PORT 3
-20dB
S G
JXP
J
IN
A
K
E
M
MDR
H
FWD
L EQ
BODE
ALIGN DOTS
REFER TO
MANUAL FOR
FUSE VALUES
JXP
POWER
DRIVE
-20dB UNIT
ADU
MAN
JXP THERM
TDU
CONTROL
STATUS
MONITOR
JXP
RTN
EQ
CAUTION:
CONTAINS PARTS
AND ASSEMBLIES
SUSCEPTIBLE TO
DAMAGE BY
ELECTROSTA TIC
FUSE
DISCHARGE (ESD)
HI
LO
NO USER SERVICAB LE
PARTS INSIDE
VOLTAGES IN EXCESS OF
USE CAUTION WHEN MAKING 300 VOLTS ARE PRESENT
INTERNAL ADJUSTMENTS UNDER COVER AND MAY
WITH COVER REMOVED BE PRESENT FOR SEVERAL
MINUTES AFTER POWER
SEE INSTALLATION MANUAL IS REMOVED
FOR SERVICE
24 V TEST POINT
-20dB
STATUS
MONITOR
OUTPUT
H
PORT 2
L
JXP 2
-20dB
JXP 3/4
FUSE
JXP
ADU H L
MAN
I I
JXP 2 C C
S S
-20dB
ADU 3
4
JXP 3/4
-20dB
FUSE PORT 4
-16dB
STATUS JXP
MONITOR COMMON
ASSEMBLED IN MEXICO
INPUT
FTEC
AC TEST POIN T
460132-001
MPPS-II
MB*/* Installation and Operation Manual
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Lid