Terrasat IBUC 2, Operation Manual

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Cyber Hardened IBUC
2
, IBUC
2e
, IBUC
2 G
, IBUC
R
, IBUC
G
Operations Manual: Installation
Engineered to Endure
J1 – Transmit In The Tx Input connector is a Type - N socket (Type - F socket,
optional) connector used to connect the IF at L - band from the modem to the IBUC.
Use 50 Ω cables (75 Ω for Type - F connectors) to connect to J1. Certain considerations
must be taken when selecting the IFL because appropriate shielding and signal levels
are required for normal system operation. The IBUC is designed to operate at rated
power with a –30 dBm Tx L - band signal, with the variable attenuator set to minimum
attenuation. The variable attenuator is accessible through the M&C interfaces for
system gain adjustment. In addition, the IBUC must have a 10 MHz input signal from
+5 dBm to –12 dBm (only for those IBUC models with an external 10 MHz reference
signal). For IBUC models with both the optional internal reference signal and an
external 10 MHz signal, the external signal will automatically receive priority without
any user interaction.
For lower wattage IBUCs that are DC powered, the coaxial cable should be selected
for its current carrying capacity. A lower wattage IBUC can draw up to 6.0 amps. The
maximum voltage drop for a 24 VDC IBUC is 4 volts and the maximum voltage drop
for a 48 VDC IBUC is 11 volts. The cable should also have good shielding
effectiveness in order to prevent outside interference.
Note:
The caution symbol, shown in Figure 3.7 , is printed on the chassis next to the J1
connector indicates that VDC may be present. In general, lower power IBUCs allow
DC power via coaxial cable. However, AC - powered IBUCs cannot be supplied via
coaxial cable.
Figure 3.7
Connector J1 Caution Symbol
Note:
Fire codes may require that cables in occupied building be installed in steel conduit.
Local government agencies may waive this requirement with the use of Plenum cables
which are standard cables encased in solid Teflon. Check codes for your area.
Note:
Equipment outages due to faulty installation are not covered by the Terrasat warranty.
Terrasat recommends following OEM procedures when making cables and
connectors.