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2.5.6
RF Connections
The following two RF connections are made at the rear of the CHPA:
•
RF Input (J2)—Type "N" female provided.
connection.
•
RF Output (J3)—Either a CPR-137 (C-band), WR-75 (Ku-band), WR-62 (high Ku-band)
waveguide flange. See details below.
•
The following (optional) RF connection is made on the front panel of the CHPA:
•
RF Output (sample) Monitor—Type "N" female provided. User needs type "N" male on
interface connection.
2.5.7
RF Output (Waveguide Connection)(J3)
The output waveguide flange of the CHPA is located on the rear panel of the CHPA. The
standard RF output interface, provided by the user, to connect the CHPA to the external
waveguide run is a flange termination. Use the following waveguide flange depending on the
CHPA band:
•
CPR-137 for C-band
•
WR-75 for Ku-band
•
WR-62 for high Ku-band (typically used for DBS applications).
The CHPA comes equipped with a grooved, threaded rear connector. An O-ring gasket is
supplied in the ship kit.
To install the waveguide flange, proceed as follows:
1. Install the O-ring gasket (supplied) in the output flange of the CHPA.
2. Position the interconnecting waveguide so that it aligns precisely with the waveguide flange
at the rear of the CHPA.
3. If alignment is not precise, or if the installation is subject to motion or severe vibration, a
flexible waveguide section should be installed between the output of the CHPA and the
interconnecting waveguide.
4. After alignment is verified in all three planes, loosely attach the interconnecting waveguide
to the output waveguide flange of the CHPA. Start all bolts and verify proper alignment
before uniformly tightening the bolts.
5. Carefully tighten all bolts (in opposite pairs rather than sequentially around the perimeter of
the flange) so that the connection is firm. Do not over tighten because this can strip the
threads or distort the mating flange. Recommended torque is 30 in-lbs for #10-32 (C-band)
and 10 in-lbs for #6-32 (Ku-band).
D
.01023245 R
.R
OC
EV
THIS DOCUMENT IS THE PROPERTY OF COMMUNICATIONS & POWER INDUSTRIES.
REPRODUCTION OR RELEASE WITHOUT EXPRESS PERMISSION IS STRICTLY PROHIBITED
User needs type "N" male on interface
CHPA S
ERIES
2-5
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