User Manual

Product Description 2-4STRATA TX Operator’s Guide/Tech Ref Manual
Power Options The STRATA TX System configurations
operate on +28 VDC power, supplied externally. This DC power
can be supplied by the optional STRATA ACU, or from another
DC power source. Contact your Sales Representative for the
latest details.
Note
A TCU and TXU are defined as being “co-located”
when the TXU and TCU are physically separated
by not greater than 6 feet.
If the TXU and TCU are co-located, power must be supplied to
each unit through their individual power connectors from the
same power source. See Figure 2-2. Do not use DC on coax to
power the TXU or TCU when the units are co-located.
Figure 2-2: Powering the TXU and TCU Independently
If your installation calls for separating the TXU and TCU, the
TXU is powered by DC supplied by the TCU or the TCU is
powered by DC supplied by the TXU. The DC power is
superimposed on the coaxial cable connected between the units.
See Figure 2-3 and Figure 2-4.
The DC input voltage to the unit co-located with the DC power
STRATA
TCU
DC Power (+28 V)
STRATA
TXU
Branched
Power Cable
supply must be greater than +24 VDC.
Refer to the “Installation” Chapter on page 6-1 (part of the
STRATA TX Technical Reference Manual only) for additional
information.
For those applications that use a TCU in a standalone mode, i.e.,
to generate ASI or DVB-S signals, DC power from the TCU to
the TXU or from the TXU to the TCU cannot be used.
Figure 2-3: Powering the TXU from the TCU
Figure 2-4: Powering the TCU from the TXU
STRATA
TXU
STRATA
TCU
DC Power (+28 V)
Up to 600 ft.
(180 m)
Coax
Power
Cable
STRATA
TCU
STRATA
TXU
DC Power (+28 V )
Coax
Up to 600 ft.
(180 m)