3-3
STRATA TX Operation Guide
400
Rev.
Power Requirements
Powering the STRATA Transmitter
3.5
Power Requirements
Table 3-2
describes the power requirements for stand-alone and multi-unit transmitter systems.
Table3-2
Power Requirements
Application
TCU
TCU + TXU
HPU
Notes
Block Diagram
• Stand-alone TXU
• Stand-alone TCU
• Co-located TXU, TCU,
& HPU
12 to 48 Vdc
12 to 48 Vdc
12.5 to 22 Vdc
or
22 to 48 Vdc
(Note 1)
Helicopter Application
28 Vdc
28 Vdc
22 to 48 Vdc
(Note 2)
Remote power from
TCU
(Note 3)
48 Vdc
(Note 7)
(Note 5, 8)
(Note 6)
TCU/TXU < 100’ apart
(Note 4)
24 to 48Vdc
(Note 8)
(Note 3)
TCU/TXU > 100’ apart
(Note 4)
48 Vdc
(Note 5, 8)
(Note 4)
Notes:
1. DC input voltage range is determined by HPU device (two voltage range
options).Power the TCUTXU from the same power source – do not use
the coaxial cable powering option.
2. Helicopter DC powering requires 22 – 48 volts for the HPU.
3. Unless the application requires powering from the TCU, always power
from the TXU.
4. The actual voltage supplied to the TCU is determined by the IF
coaxial cable length.
5. For remote powering applications requiring the HPU option, use the 22 – 48 volt HPU power
option.
6. Only use the TCU powering option when power is not available at the TXU.When powering
separated TCU/TXU components, powering from the TXU is the preferred choice.
7. The actual voltage supplied to the TXU is determined by the IF coaxial cable length.
8. The actual voltage supplied to the HPU is determined by the RF coaxial cable length.
TCU
POWER
SUPPLY
TXU
IF / DC
RF / DC
HPU
DC
DC
Note:
• TCU, TXU, and HPU
at the same location.
• This method is
recomended
for powering co-located
systems.
When the TXU and TCU are
powered separately, the
superimposed DC voltage between
the TCU and TXU is turned off.
See
Section 3.6, "DC
Superimposed Voltages," on
page 3-4
TCU
POWER
SUPPLY
TXU
IF / DC
DC
RF / DC
HPU
Note:
• TCU, TXU, and HPU
at the same location.
• This method is
recomended
for powering co-located
systems when power can
not be applied to TXU.
When the TXU and TCU are both
powered from the TCU, the DC
superimposed voltage is turned on.
See
Section 3.6, "DC
Superimposed Voltages," on
page 3-4
TCU
POWER
SUPPLY
TXU
IF / DC
RF / DC
HPU
DC
Note:
• TCU seperate from TXU and HPU
When the TXU and TCU are
both powered from the TCU,
the DC superimposed voltage
is turned on. See
Section 3.6,
"DC Superimposed Voltages,"
on page 3-4