facility to be installed.
Caution! Always use the supplied ESD wristband when working with a powered ONS 15454. Plug the
wristband cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
If you use DS-1 electrical twisted-pair cables, equip the ONS 15454 with an SMB EIA on each side of the
backplane where DS-1 cables will terminate. You must install special DS-1 electrical interface adapters,
commonly referred to as a balun, on every transmit and receive connector for each DS-1 termination.
Electrical Interface Adapters
Note: DS-1 electrical interface adapters project an additional 1.72 inches (43.7 mm) from the ONS 15454
backplane.
If you install DS-1 cards in the ONS 15454, you must fit the corresponding transmit and receive SMB
connectors on the EIA with a DS-1 electrical interface adapter. You can install the adapter on the SMB
connector for the port. The adapter has wire-wrap posts for DS-1 transmit and receive cables. Figure 1-22
shows the DS-1 electrical interface adapter.
Note: "EIA" refers to electrical interface assemblies and not electrical interface adapters. Electrical interface
adapters are also known as baluns.
Figure 1-22: DS-1 Electrical Interface Adapter (Balun)
Each DS-1 electrical interface adapter has a female SMB connector on one end and a pair of 0.045 inch (1.14
mm) square wire-wrap posts on the other end. The wire-wrap posts are 0.200 inches (5.08 mm) apart.
Caution! Always use the supplied ESD wristband when working with a powered ONS 15454. Plug the
wristband cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
UBIC-V Cables
When using the DS-1 cables on a UBIC-V, the maximum distance is 655 feet (199.6 m). When using the
RG-59 (734A) DS-3/EC-1 cables on a UBIC-V, the maximum distance is 450 feet (137.2 m). The maximum
distance when using the RG179 DS-3/EC-1 cable (79 feet [24.1 m]) is due to a higher attenuation rate for the
thinner cable. Attenuation rates are calculated using a DS-3 signal:
For RG-179, the attenuation rate is 59 dB/kft at 22 MHz.•
For RG-59 (735A) the attenuation rate is 11.6 dB/kft at 22 MHz.•
The following cables are available for use with the UBIC-V EIA:
ONS_15454_Reference_Manual_R8.5.x_--_Shelf_and_Backplane_Hardware
Twisted Pair Wire-Wrap Cables 35
To Next Page
Loading...
