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ARMA-C250-CRM
9
2.
GENERAL INFORMATION
2.1
INTRODUCTION
This manual contains information required to install and operate the Redundant 250 W, C-Band
Rack-mount Solid State Power Amplifier Model # ARMA-C250-CRM, in a 1:1 redundant
configuration.
2.2
DESCRIPTION
The ARMA-C250-CRM includes two 250 W solid state power amplifiers (SSPA) and a
waveguide switching unit for 1:1 redundant operation. Each SSPA incorporates a DC main
power supply and a forced air cooling system. Each SSPA features an RS-485 interface that
provides full remote monitor and control of selected functions. A product outline drawing of a
redundant system is shown in
at page 13. The functional block
diagram of a single solid state power amplifier is shown in
block diagram of the redundant system is shown in
2.2.1
P
OWER
S
UPPLY
The main power supply provides a DC high current output to the HPA (High Power Amplifier),
a low current output to the secondary power supply and to two filtered, low current supplies for
operation of the four fans. The secondary power supply has multiple outputs for operation of the
Monitor and Control Assembly and the front panel display. The main power supply is configured
for operation from 220V AC. The fans are configured for 48V DC.
2.2.2
HPA A
SSEMBLY
The HPA Assembly amplifies the RF input signal to a level sufficient for transmission. Integral
to this module are low noise and power amplifier sections as well as variable attenuation sections
that are used for temperature compensation and gain control. Other functionality includes
internal power conditioning, temperature monitoring & high temperature shutdown.
2.2.3
M
ONITOR AND
C
ONTROL
A
SSEMBLY
The MCA (Monitor and Control Assembly) monitors all the important operating parameters of
the system, and communicates externally via serial and discrete interfaces as well as the front
panel controls and display.
Summary of Contents for ARMA-C250-CRM
Page 13: ...ARMA C250 CRM 12 Figure 1 Product Outline redundant system front and rear views...
Page 14: ...ARMA C250 CRM 13 Figure 2 Waveguide Connections top view side view...
Page 56: ...ARMA C250 CRM 55 Figure 12 Product Outline single unit...
Page 57: ...ARMA C250 CRM 56 Figure 13 3 D View of the Redundant System in rack cabinet...
Page 58: ...ARMA C250 CRM 57 Figure 14 Enlarged 3 D View of the Redundant System in rack cabinet...