Reeve LPC2Q, Instruction Manual

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TMA2Q/LPC2Q Quadrature Tower Mounted Amplifier Instruction Manual
Refer to last page for revision and copyright information, File: TMA2QInstructionManual.doc, Page 1
I. General
A. Application
The tower mounted amplifier system described here is designed to be used with CALLISTO instruments but
there is nothing in the design that prevents its use with other receivers within the frequency range 50 ... 500
MHz.
B. Description
The system includes two assemblies, the tower mounted amplifier assembly TMA2Q and LNA power coupler
assembly LPC2Q. The TMA2Q and LPC2Q are built, tested and sold as a pair. Refer to figure 1. The TMA2Q is
equipped with two low noise amplifier modules, one for each of two circuits, and associated bias-tees and
power supplies. The LPC2Q is equipped with complementary bias-tees and power supplies and a quadrature
coupler. The LPC2Q supplies power to the amplifier modules through the interconnecting transmission lines.
Bias-Tee
3.3 Vdc
Voltage Regulator
Bias-Tee
8.0 Vdc
Voltage Regulator
6.3~8.0 Vdc
3.3 Vdc
RF +
dc
RF
RF
RF +
dc
dc dc
Tower-Mounted Amplifier Assembly
CALLISTO No. 1
RF In
Observatory
Power Supply
LNA Power Coupler Assembly
8.0 Vdc
Antenna A
CCW
Coaxial
Cable
TMA2Q LPC2Q
CALLISTO No. 2
LNA
In
LNA
Out In
Antenna B
CW
Coaxial
Cable
RF In
RF OUT + dc
CCW
RF IN + dc
N-S
RF IN
CCW
RF IN
CW
RF OUT
N-S RHP
RF OUT
E-W LHP
Limiter
3.3 Vdc
Voltage Regulator
8.0 Vdc
Voltage Regulator
Bias-Tee
3.3 Vdc
Bias-Tee
RF +
dc
RF OUT + dc
CW
RF IN + dc
E-W
RF
Input
Isolated
+90°
Output
0°
Output
+90°
+90°
0°
0°
Quadrature
Coupler
Antenna
A and B are
cross-polarized
dc 8.0 Vdc
RF +
dc
RF
6.3~8.0 Vdc dc
Out
12 Vdc
Figure 1 ~ System block diagram showing interconnections.
B. Basic Specifications
Parameter Value Remarks
Frequency range nominal 50...500 MHz Test limits, limited by quadrature coupler
Transmission gain nominal 17 ~ 13 dB
Measured at test limits, varies with frequency, includes
coupler splitting losses
RF connectors N-female
Input voltage nominal 12 Vdc, range 11 ... 15 Vdc Power jack wired CENTER POSITIVE
Input current nominal 135 mA Maximum load of each LNA module is about 82 mA
Dimensions
TMA2Q: 9.5 in L x 7.4 in W x 5.3 in D
(241 mm L x 188 mm W x 135 mm D)
LPC2Q: 7.9 in. L x 4.3 in W x 3.2 in H
(200 mm L x 110 in W x 82 mm H)
Weight
TMA2Q: 3.75 lb (1.7 kg)
LPC2Q: 2.2 lb (1.0 kg)