AR 10027190, Operating And Service Manual

Page: 19 / 62

Models 200T18G26z5A/200T26z5G40A
Rev – 9
3.2.3 Cooling Requirements
The TWTA is provided with two cooling fans. It is important that air movement around the rear of the unit
be unobstructed.
CAUTION:
For either bench or rack mounting, do not position the TWTA in such a
way that the air intakes or outlets are blocked, or that the exhaust flows
are directed into the intakes. See Paragraph 3.5 for location of air intakes
and air outlets. If the unit is rack mounted, make sure that the intake air
is 45°C or below. If necessary, fabricate short ducts to direct the hot
exhaust air out of the rack enclosure. Great care must be taken to
minimize any flow restrictions. Avoid mounting heat-producing
equipment in the same rack, especially below the TWTA. Failure to
provide adequate cooling can result in the unit's shutting down from over
temperature conditions.
The TWTA dissipates approximately 1500 watts when in the operate mode.
3.2.4 AC Line Power Connections
The AC line power connection to the TWTA is made at the AC inlet J1, which is a female IEC-320 16A
connector. The power inlet receptacle is provided with a clamp that can be used to secure the mating plug
from accidental withdrawal. A line cord with AC plug suitable for the type of AC outlet used and consistent
with local electrical codes must be used to mate with J1. Minimum wire size recommended for the line cord
is 1.5 mm² (16 AWG).
Units are provided with an un-terminated 3-wire cord. To use this line cord it should be terminated with a
suitable plug to a 190 to 260 VAC 50-60 Hz. single-phase source as follows:
Color Function
International Harmonized North American
Brown Black Line
Blue White Neutral
Yellow/Green Green Safety Ground
CAUTION:
Connect plug to J1 and secure plug with bracket only when no AC is
supplied to the cord.
3.2.5 RF Output Connections
The RF output connection is a WR-42 waveguide flat flange in the 200T18G26z5A. The RF output
connection is a WR-28 waveguide flat flange in the 200T26z5G40A. Output flange alignment is critical for
proper operation. Align the two flanges and secure the mating waveguide while maintaining flange
alignment.