User Manual

Routine Operation 3-7STRATA TX Operator’s Guide/Tech Ref Manual
between the TCU and the TXU. This DC power option is used
when the TCU and the TXU must be deployed in two separate
locations.
When the TCU and TXU are co-located, MRC recommends both
units be powered from the same DC power source.
If your STRATA TX System does not contain a TXU, the DC ON
COAX switch may not be present. If the switch is present, it
should be set to the OFF position.
If your STRATA TX System contains both a TXU and a TCU, the
System gives you several ways to control DC power on the
coaxial cable between the TCU and the TXU, depending on the
configurations of your TCU and TXU:
•The DC ON COAX switch on the front panel of the TCU
(See Figure 3-3 on page 3-6) and the DC ON COAX
switch on the front panel of the TXU (See Figure 3-1 on
page 3-2).
•The 75 Ohm Coax option on the Command Screen.
Both control methods must be enabled for DC power to be
operational if your TCU and TXU configurations contain the DC
ON COAX switches. If the DC ON COAX switch is not present
on your TCU, DC power can only be applied using the 75 Ohm
Coax option on the command screen. The TXU DC ON COAX
switch must be set to ON in either situation.
TCU Control Switch Routine operating settings are controlled
by the Control Switch. Turning the Control Switch right (cw) or
left (ccw) displays status and settings and pressing it in makes
selections, as described below:
Turning the Control Switch to the right (cw)
displays the Monitor Screens.
The Monitor Screens provide current
status of the STRATA TX System,
including:
• Frequency Settings
• Mode - Analog or Digital
• Audio Settings
• Video Settings
• System Errors.
Turning the Control Switch to the left (ccw)
displays the Command Screens.
The Command Screens allow control of the
STRATA TX System, including:
• Changing the Preset
• Setting the RF Channel
• Set Power Output
• Select 75 Ohm Coax Power On or Power
Off (Turns power from TCU to TXU or TXU to
TCU on or off if DC power is superimposed on
the coaxial cable between the TCU and the
TXU).