Return Amplifier, Ra-Kit/H Or Ra-Kit/L; Ingress Control Switch - Motorola BLE Series Installation And Operation Manual

Figure 2-8 illustrates the interconnection among these components:
F i g u r e 2 - 8
B L E * / * b l o c k d i a g r a m
-1.0dB
SFE
-20 dB
or
TP
SCS
**
-1.0dB
Input
-1.7
port
H
RF/ dB F
AC RF
-1.0
AC
L
dB R
**
-1.0dB
-0.4dB
TP
-20 dB
Surge
protector
R e t u r n A m p l i f i e r , R A - K i t / H o r R A - K i t / L
The circuit board of the forward amplifier accommodates the optional return amplifier. The
return amplifier kit, model RA-Kit/H or RA-Kit/L, includes the return amplifier hybrid and
jumpers. The standard circuit board contains all components including the diplex filters with
extended return bandwidth for the amplifier input and output. All items are plug-in and easily
installed. The input and output of the return amplifier include two JXP-*T pad facilities. You
can also use either pad socket as a test point or a signal injection point. The output pad value is
normally selected to control the return signal level into the next upstream amplifier. Select an
appropriate input pad to attenuate excessive input signal.
The return-input test point and the return-output test point are directional couplers. Both test
points present 75-ohm source impedance and do not require special test probes.
I n g r e s s C o n t r o l S w i t c h
The ingress control switch (ICS) module provides return-path signal attenuation or cutoff in the
BLE*/*. This is accomplished through the LIFELINE
(Figure 2-9 illustrates the location of the optional ICS). The ICS provides a means of isolating
sources of ingress from a centralized location. Using a downstream command through the
-1.0dB
* see
(~0.0dB with
jumper)
chart -1.0dB
JXP-T JXP-T RCB LDR
PP
** ** ** **
Manual Auto
ADU/
TDU
**
+25.0dB L
-0.5dB +30.0dB H -0.3dB
SRE Therm
** **
Power
supply
Power
block
Fuse
jumper
FTEC
* see
-6.5dB chart
BODE PD
**
On-board
attenuator
**
**
Status
monitor
**
-0.4dB
Surge
LPF ICS JXP
-0.4dB protector
-16 dB
** **
24 Vdc
DC test point
** Plug-in module
BLE Model Input PP Output PD
*
870MHz E-GaAs +24dB
870MHz High Gain +24dB
750MHZ E-GaAs +24dB
750MHZ Silicon +23dB
®
status-monitoring module, LL-BLE-HMS.
B L E * / * I n s t a l l a t i o n a n d O p e r a t i o n M a n u a l
O v e r v i e w 2 2 2 2 - - - - 9 9 9 9
-1.0dB
**
Output
-1.7
H
RF/ port
dB F
RF AC
-1.0
AC
L
dB R
-1.0dB
JXP-T
**
TP
return
injection
point
-20 dB
TP
-20 dB
+ 18dB
+ 20.5dB
+18dB
+18.5dB