41
Figure 3-2: Locating the Branching Unit Mounting Screws
Install the New Branching Unit
•
Assemble a new BU Assembly (Tx filter, Rx filter and Circulator Assembly):
o
reusing, if possible, only sound disassembled components, or
o
using new components bearing the same specifications as the original ones.
•
Position the replacement BU Assembly in its designated location, ensuring to align properly
all screws on the filters with their corresponding holes on the bottom of the shelf.
•
Re-fasten the 6 Captive screws unfastened earlier, to secure the BU Assembly to the
bottom of the shelf. DO NOT overtighten.
Re-install the Transceiver
•
Reconnect the RF switch ribbon cable to the bottom of the transceiver, slide the transceiver
in the shelf, then fasten its Captive screws (2) to secure it in place.
•
Using a 5/16 inch SMA torque wrench w/right-angle adaptor or a Standard torque wrench
set to 0.1 kg•m (9.0 lb-inch), reconnect the RF cables to the transceiver, referring to the
applicable configuration. For guidance, follow procedure Install the New RF Cable,
described later in this Chapter.
•
Re-place the RFU section cover plate by fastening both its Captive thumbscrews.
Summary of Contents for SKYWAY-EM
Page 11: ...11 Figure 1 8 1 1 MHSB Tx SD Rx Configuration Figure 1 9 1 0 Tx SD Rx Configuration ...
Page 12: ...12 Figure 1 10 1 1 FD or 2 0 Configuration Figure 1 11 1 0 MHSB Ready Configuration ...
Page 43: ...43 Figure 3 3 Socket head Screws for Removal Figure 3 4 Separating Filters from BU ...
Page 50: ...50 Figure 32 1 1 MHSB Figure 33 1 1 Tx MHSB SD Rx ...
Page 51: ...51 Figure 34 1 0 Tx SD Rx Figure 35 1 1 FD 2 0 ...
Page 52: ...52 Figure 36 4 0 ...
Page 53: ...53 Figure 37 2 2 MHSB ...
Page 54: ...54 Figure 38 2 2 MHSB Rx SD Figure 39 Hybrid Diversity FD with 2 Antennas ...