4
DLC300 Function Module Installation and Operations Manual
DLC300 Function Module
Signal Paths
The primary signal path of the DLC300 is determined by the mode in which it operates, which are as follows:
•
Transmitter mode—Electrical input to optical transmit
•
Receiver mode—Optical receive to electrical transmit
•
Repeater mode—Optical receive to optical transmit
Both hardware and software provide flexibility in routing, such as allowing the selection of input and output
paths.
The DLC300 allows you to select one the following transmitter sources:
•
Electrical input BNC (transmitter mode)
•
One of the other DL4000 chassis slots (transmitter mode)
•
Optical receiver output (repeater mode)
The receive path is connected to the electrical outputs and is also made available to the function modules
located in the remaining chassis slots.
The monitor output is determined by the operating mode of the DLC300. When the DLC300 is operating in
either receive or repeater mode, the monitor displays the received signal. When the DLC300 is operating in
transmitter mode, the monitor displays the transmitted signal.
Electrical Input
The electrical input is a precision 75 Ohm BNC and includes an automatic cable equalizer. This input passes
through a multi-rate reclocker that detects the signal rate but is format transparent.
When no input signal is connected and the DLC300 is in transmitter or repeater mode, the DLC300 transmits a
standby signal to the optical receiver to maintain the optical link between modules. The DLC300 can transmit
either an SDI video or a PRBS143 non-video standby signal.
Note:
For optimal performance, follow the recommendations stated in the DLC300 data sheet for full
cable lengths and cable types.
Electrical Outputs
The electrical output is a precision 75 Ohm BNC with a multirate cable driver.
The mini 75 Ohm SMB monitor jack (MON) located on the front panel also provides an electrical output (see
the
“Signal Paths”
section on
page 4)
Receive electrical output is provided on the output BNC through a multirate driver directly connected to the
receive path reclocker. The electrical output signal is also made available to the function modules located in
the remaining DL4000 chassis slots.
Note:
For optimal performance, follow the recommendations stated in the DLC300 data sheet for full
cable lengths and cable types.
