This Operation Manual covers the following amplifier
type numbers:
STA2175, STA2275, STA2375, STA2T45, and
STA2450 Series (including all derivatives).
SAFETY NOTES
The following warnings and precautions are for your safety and the prevention of injury. Please read
them carefully and observe at all times when installing or operating a Stellar Travelling Wave Tube
Amplifier. Hazard warning signs, as defined in BS5378 Safety Signs and Colours, are used on the
equipment to highlight any possible hazards.
Earthing
The mains supply connection cable to the amplifier must include an electrical safety protective earth
conductor, installed and connected to the local distribution system earthing point in conformance with
local regulations. The electrical safety protective earth conductor must be capable of carrying 20A
and must be from an approved manufacturer (2.5 mm
2
/12 AWG).
An external protective earth, also providing protection against RF and transient currents, must be
connected between the amplifier and an adjacent earth point before applying the mains supply and
should only be removed after disconnecting the amplifier from the supply. The external protective
earth conductor must be a flat copper strap, braided or plain, and must be capable of carrying 30A.
The length of external protective earth conductor must not exceed 400mm.
Mains Supply
A mains supply disconnection device must be provided to isolate this amplifier from the mains supply
source. Either a plug/socket outlet or a two-pole isolation switch must be used as the mains supply
disconnection device, and it must be easily accessible. The connector on the amplifier is NOT
suitable, and must not be used to disconnect the amplifier when powered.
Toxic Material
The Travelling Wave Tube (TWT) within the amplifier contains beryllium oxide. Dust created by
breakage, or fumes from a beryllium oxide fire, are highly toxic if inhaled, or if particles enter the body
via a cut or abrasion.
Consult e2V technologies and the appropriate national authorities for details regarding the disposal of
damaged or old TWTs and amplifiers.
© e2v technologies (uk) limited 2010
DAS768892AA
Version
1,
page
2
