User Manual

Routine Operation 3-32STRATA TX Operator’s Guide/Tech Ref Manual
9. Press the Control Switch for one second to place the
TX System in the transmit mode, as required.
3.6.4 Controlling TCU to TXU DC Power on Coax
If your STRATA TX System requires the TXU and TCU to be
mounted in separate locations, MRC recommends powering the
TCU via the coaxial cable from the TXU.
Note
When the TCU and TXU are mounted in separate
locations, it is recommended that DC input power
be connected to the TXU.
Since either unit may be powered from the other
unit via DC power superimposed on the coaxial
cable between the units, DC input power may
therefore be applied to either the TXU or the TCU.
If your TXU and TCU configurations contain DC ON COAX
switches mounted on the units, these switches must be set to
ON in addition to controlling DC power superimposed on the
coaxial cable from the TXU to the TCU or from the TCU to the
TXU.
To apply DC power from the TXU to the TCU superimposed on
the coaxial cable between the two units, perform the following
steps.
Notes
This procedure must only be performed on
STRATA TX Systems where the TXU and TCU are
physically mounted in separate locations.
This procedure may be performed using either the
TXU or TCU Control Switch and display.
Apply DC Power on Coax
1. Verify the STRATA TX System is connected and
powered up. See ”Powering the STRATA TX System”
on page 3-12.
2. Observe the Main Screen (Figure 3-32) is displayed.
Figure 3-32: Main Screen
Note
If your TCU does not contain a DC ON COAX
switch, go to step 4.
3. Turn the recessed DC ON COAX switch on the front
panel of the TCU until the screw slot points to OFF.
4. Turn the recessed DC ON COAX switch on the front
panel of the TXU until the screw slot points to OFF.
5. Turn the Control Switch ccw until the display reads 75
Ohm Coax.
See Figure 3-33.
Figure 3-33: 75 Ohm Coax
Preset 3
. W
75 Ohm Coax
Power Off