Comtech EF Data HPCST-5000 - Manual (Page 73)

High-Power TWTA Satellite Terminals Single Thread System Installation
Rev.1 2–27
2.3.4.4 RF TX Sample (J4)
A sample port (type N female connector) is provided that indicates the power level at the
output flange based upon a known coupling factor. The coupling factor is limited in
range to 40 dB,
±
3 dB. At the specific frequency points, the coupling factor is within
±
0.25 dB, representing the power at the output flange.
This connector is connected to a probe in the output waveguide assembly of the TWTA.
The output power of the amplifier may be approximately determined by monitoring this
port.
2.3.4.5 RF Output (J5)
The RF output is a WR-75G or WR-137G interface.
The output frequency is determined by the type of installation:
•
C-band (5845 to 6425 MHz)
•
Extended C-band (6725 to 7025 MHz)
•
Ku-band (14.0 to 14.5 GHz)
2.3.4.6 Waveguide
The RF output waveguide port is located on the end of the amplifier. Ensure that the
proper matching waveguide flange (C-band: CPR137G; Ku-band: WR-75) and gaskets
are used to connect the RF output to the feed horn of the antenna. Information regarding
waveguide connection kits is located in Section 2.2.1.
1. Position the interconnecting waveguide flange with the amplifier waveguide
flange. Make sure that the flanges can be mated without strain or torsion.
2. If the two flanges cannot be properly aligned or if the installation is subject to
vibration, use a flexible waveguide section to eliminate potential strain on the
waveguide connection.
3. Insert any necessary gaskets and windows between the two flanges.
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.
4. Start by hand tightening all mounting screws (C-Band: 10-32; Ku-Band: 6-32).
5. Tighten all mounting screws with the appropriate size Allen

wrench.