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HPOD
Introduction
1.2 F
R
IELD
EPLACEABLE
Recognizing that the MTBF limiting factor for almost all electronic equipment is the
power supply, the HPOD provides for easy field replacement. Simply disconnect the AC
mains, release the captive fasteners, and remove the supply from the SSPA module.
1.3 T
S
HE
OLID
Each HPOD SSPA is constructed with highly reliable GaAs FETs. With third order
intermodulation products from 4 to 6 dB better than TWT ratings, the CEFD unit replaces
TWTs with saturated power levels of up to twice the HPOD's rated output. The HPOD
SSPAs also provide an MTBF that is 4 to 5 times greater than the typical TWT MTBF.
1.4 F
UNCTIONAL
Each HPOD consists of a CEFD SSPA module with the Monitor/Control Processor
(MCP), a field replaceable power supply, and a field replaceable fan assembly. The
amplifier features a Comtech EF Data low loss combining technique and MCP based
temperature versus gain compensation.
1.5 B
-I
R
UILT
N
Each Comtech EF Data HPOD has the ability to function as a 1+1 (one backup for one
primary) and 1+2 (one backup for two primary) redundant controller in the backup mode.
The optional redundancy configuration is implemented by attaching a ganged
waveguide/coax transfer switch(es) to the input and output connectors of the amplifiers
with a combination coaxial cable and waveguide kit. When the backup SSPA is
commanded into the controller mode, it monitors the online SSPA(s) for faults. A faulted
online unit may be disconnected and replaced without affecting the online power
amplifier.
P
OWER
-S
A
TATE
DVANTAGE
D
ESCRIPTION
C
EDUNDANCY
ONTROLLER
S
UPPLY
1–2
Revision 2
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