User's Manual

1
Part Number: J24004
Drawing Control: JD16049
PRODUCT OVERVIEW and GENERAL INFORMATION
The 48660 Bi-directional Amplifier is a single channel CDMA PCS repeater. It is designed to amplify just one
CDMA channel while rejecting all others. The 48660 is tunable over the entire PCS band and provides
approximately 65 dB of gain to the selected channel. The unit is designed to enhance PCS coverage in buildings,
basements, parking garages and other RF shielded environments. The unit is wall mountable and requires no
periodic maintenance.
PERFORMANCE
This unit has a RF section that provides 65 dB of gain, down conversion and IF filtering. The IF filters use SAW
technology for optimal selectivity. After upconversion, the output stage filtering attenuates LO leakage while
amplifying the selected channel to the set output power level. The standard product offers channel tuning locally by
means of dipswitch or RS-232 connection. The control settings are for frequency selection and gain control to limit
power. Automatic power control assumes a wide input power dynamic range and intermodulation distortion
control.
BLOCK DIAGRAM
Figure X.1 System Block Diagram
FCC COMPLIANCE
SYNTHESIZER
UP LINK IF SECTION
DOWN LINK IF
SECTION
DOWN LINK INPUT
SECTION
UP LINK INPUT
SECTION
UP LINK OUTPUT
SECTION
DOWN LINK OUTPUT
SECTION
D
D
A
A
T
T
A
A
L
L
I
I
N
N
E
E
S
S
A
A
N
N
D
D
C
C
O
O
N
N
T
T
R
R
O
O
L
L
D
U
P
L
E
X
E
R
D
U
P
L
E
X
E
R
FROM DONOR SITE
TO SERVICE AREA
DOWN LINK SIGNAL FLOW
U
U
P
P
L
L
I
I
N
N
K
K
S
S
I
I
G
G
N
N
A
A
L
L
F
F
L
L
O
O
W
W