User Manual

Product Description 2-3CodeRunner 2 Operator’s Guide/Tech Ref Manual
2.3 System Components
An MRC CodeRunner 2 system is made up of the following
components:
• A rack mounted Indoor Unit (IDU), typically mounted
inside an ENG vehicle.
• A mast mounted Outdoor Unit (ODU), also called the RF
Unit (RFU).
A typical system is shown in Figure 2-2.
The IDU contains the baseband circuitry, power supply, and
control modules. It accepts a variety of audio and video inputs,
both digital and analog, and generates a 70 MHz IF output. It
also accepts IF input from external modulators.
For digital operation, the IDU can be equipped with an optional
internal MPEG/COFDM Module. Or, the IDU can be used with
existing external digital encoders and modulators.
The ODU contains the upconvertors and power amplifier. The
ODU accepts the 70 MHz IF, converts it to the operating band
chosen, and amplifies it.
Every installation will include an antenna, either directional or
omnidirectional, or both. An MRC RF Switch can be mounted up
on the mast to select the antenna desired.
When using a mast mounted antenna, a Nycoil conduit sheath
covers the wiring harness between the IDU to the ODU. This
harness carries the power, IF, and antenna band and polarization
switching. Addition wiring is added for controlling the pan & tilt
mechanism, and for implementing additional functions such as
off-air monitors, mast lights, etc.
Figure 2-2: CodeRunner 2 System Components
RF Switch
Directional Antenna
(MRC 2A20, 7A30, Ellipse 2000)
Pan & Tilt Assembly
Outdoor RF Unit
(Upconvertor,
Power Amp)
Conduit (Nycoil)
OmniPole Antenna
CodeRunner 2 Indoor Unit
(Baseband, Audio/Video Modules)
External
Modulator
(Optional)
External
Encoder
(Optional)
Internal
MPEG Encoder &
COFDM Modulator
(Optional)