Installation manual

Unpacking and Installation
MNC-0300-001 7 of 20 Revision L
section should be utilized to eliminate potential strain on the
waveguide connection.
3. Insert any necessary gaskets and windows between the two
flanges.
Note
The waveguide that is connected to the HPAs
should have a good match of 1.5:1 or better for
optimal performance. Waveguide connected to tri-
band HPAs (C, X, Ku) and dual-band HPAs (C,
Ku) in particular need to have this match. These
HPAs do not contain isolators due to their
bandwidths. Also, the in-band harmonics of
excessive power reflected into the HPA can cause
damage to the TWT. It is recommended that a
transition is made to rectangular waveguide and an
isolator used to assure a good match to the HPA
and to absorb reflected powers at the harmonic
frequencies. The typical output VSWR of isolators
when included in the HPA is 1.3:1.
Note
If the connecting waveguide is to be pressurized at
greater than 5 PSI, a waveguide window must be
installed at the output flange of the amplifier. Use a
conductive type gasket to preclude radiation
leakage.
4. Start by hand tightening all waveguide mounting screws.
5. Tighten all mounting screws with the appropriate size Allen
wrench.
Caution
Do not overtighten the waveguide mounting
screws. Overtightening may strip the threads in the
waveguide flange. Failure to comply could result in
equipment damage.
Vorsicht
Überdrehen Sie die Hohlleiter-
Befestigungsschrauben nicht. Dadurch kann das
Gewinde im Hohlleiter-Flansch ausreißen.
Nichtbefolgen könnte Beschädigung des Gerätes
zur Folge haben.
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