User's Manual

044-05156 Rev C 19
System Interface Module
A FE
D
B
C
I
2
C
d
I
2
C
m
1
3
2
FORM-C
6
66
9
99
99
9
MCR21929-1-2
Max Combined Power 220W (53.4dBm)
+51.5 +/-0.5dB Gain Max
10 dB Dynamic Range
VVA
Controller
G3S-1900-125
Switch
Comb.
S
p
l
i
t
t
e
r
+27VDC GND
Form-C
1
6
To
Controller
RS-485
RS-485
VVA_Contro
l
Switch_ Control
L/A
-0.1dB
TX
R
X
DLNA0
Detector
Circuit
FWD
RVS
-3.0dB
-0.1dB
-0.1dB
LNA
d
50
Ω
I
2
C
I
2
C
+27VDC
B
9
GND
+12VDC
-0.8dB
TX/RX
m
+52.1dBm
+53.3dBm
+53.4dBm
-0.1dB
-0.5dB
-0.3dB
-0.2dB
+49dBm
+21.7dBm Max/Carrier
+30.7dBm Composite
+30.9dBm
-0.2dB+21.7dBm Max/Carrier
+30.7dBm Composite
TX:
+52.0dBm (160W)
8 Carriers @ +43.0dBm/Carrier
RX:
-23.0dBm Max/Carrier
-14.0dBm Composite
+4.7dBm
+5.2dBm
Composite
8 Carriers @
-3.8dBm/Carrier
Power from S-
New Cabinet
with Cable
Loss
VVA Set @
-2.8dB
to achieve
max RF
output
RX
d
A
N
T
RS-485
To
2nd
MCPA
TX
R
X
DLNA1
Detector
Circuit
FWD
RVS
-3.0dB
-0.1dB
-0.1dB
LNA
d
50
Ω
I
2
C
I
2
C
9
+12VDC
-0.8dB
+53.3dBm
-0.3dB
+49dBm
+30.9dBm
A
N
T
A
04-0065B-B
G3S-1900-125
+27VDC
GND
Antenna Power Levels:
L/A
-0.1dB
OPAF-1923-P07C01 RF Configuration, Single Sector Example
4.3 RF Input Signal
Any number of RF input signals can be applied to the transmit RF input port, providing: the signals meet
established mask requirements for any 2G or 3G wireless modulation scheme, the input signals do not cause the
amplifier to be over driven, and the gain of the system meets the appropriate base station architechural
requirements. The maximum input power for all carrier frequencies should not exceed the limits idicated in the
system specification. The input VSWR should be 2:1 maximum (or better).
4.4 RF Output Load
The load impedance should be as good as possible (1.5:1 or better) in the working band for good power transfer to
the load. The amplifier is operated into a duplexer and will maintain its distortion characteristics outside the signal
band even if the VSWR is infinite, provided the reflected power does not exceed one watt. A parasitic signal of less
than one-watt incident on the output will not cause distortion at a higher level than the normal forward distortion (i.e.
-63 dBc).