Constellation™ 2002 June 20
4-20
Figure 4-13: ACU
e. Install the spacer adapter onto the antenna port.
f. Connect the antenna waveguide to the ACU flange.
Use the flexible waveguide to interface between the radio’s waveguide
flange and the rigid waveguide. This interface allows flexibility in
movement should a seismic disturbance occur.
g. Secure all cable and waveguide assemblies as required.
h. Pressurize the waveguide, and check all waveguide connections for
leaks. Tighten the joints as required.
9. Test the office battery voltage.
Use a digital multimeter to test the battery (source) voltage. The battery
polarity may be positive or negative with respect to ground.
The following table lists the battery noise requirement.
10. Connect the battery power wires.
Source (V) Accepted Value (V)
24 21 to 28
48 42 to 56
Office Battery Noise Level
(mV, peak to peak)
≤ 50
Antenna port
Spacer adapter
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