Operating instructions
Overview 2-11
MB*/* Installation and Operation Manual
Figure 2-13 illustrates the interconnection between these components in the single output
MB*/S*:
Figure 2-13
MB*/S*single output block diagram
Input
port 1
Port
4
Port
3
DC SP
JMP
RF/
AC
RF
AC
(Status
Monitor
Output)
Manual Auto
H
L
**
** ** ** **
**
**
MDRBODE
** **
**
****
** **
**
SRE THERM
JXPICS
Fuse
**
**
Fuse
Fuse
Power
supply
Plug-in
module
24 Vdc
****
ADU/
TDU
RF/AC
RF
AC
DC/
SP/
JMP
RF/
AC
RF
AC
To status
monitor
**
H
L
-1.0 dB
-1.0 dB
-1.0 dB
Fltn.
Cntrl.
-4.0 dB -6.5 dB -1.0 dB +19 dB
-1.7 dB F
-1.0 dB R
-20 dB
TP
-20 dB
TP
-20 dB
TP
-20 dB
TP
-1.0 dB R
-2.0 dB F
-1.0 dB
-1.0 dB
SFE
or
SCS
PP
PP
-0.4 dB -0.5 dB
Status
Monitor
Input
**
-16 dB+25.0 dB L
+30.0 dB H
-0.3 dB
-0.4 dB
-0.4 dB
+18.0 dB E-GaAs
+20.5 dB Silicon
OnBrd
A
tten
LPF
-0.4 dB
Surge
protector
Surge
protector
PD
JXP-B JXP-B
JXP-B
JXP-B
+25.0 dB E-GaAs
+23.0 dB Silicon
JXP-B
JXP-B
JXP-B
Accurate −20 dB directional coupler test points are available at the input and at the output of
the amplifier. Because these test points are 75-ohm source impedance, they do not require
special test probes.
After the output amplifier, a second directional coupler provides signal to the optional ADU
board. As this signal is used only with the ADU, you do not need to terminate this port when the
ADU is not installed.
Models SP and DC
Port 2 is a dedicated amplifier path in the MB*/*. The other path can feed port 3 or port 4
depending on where you install the furnished JMP jumper. The model SP splitter and model
DC/* directional coupler provide output at both ports 3 and 4. The SP provides equal output
levels, while the DC/* provides one high-level port and one low-level port. The high-level signal
is routed to port 3 or port 4 and is based on the orientation of the DC/* during installation.
Figure 2-1 illustrates the port numbers identified on the amplifier cover and Figure 2-7
illustrates the port numbers cast into the MB-HSG.
When installing a DC/* or an SP, complete the installation and install fuse F3 before you apply
RF power.