User's Manual

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The operator can choose:
• CVBS : Composite Video Baseband Signal
• YUV : Component video
• SDI: Serial Digital Video
• ASI: Transport
If there is no signal on the selected input, the CARRY-CODER II displays a “No video” warning message and will not
transmit.
The video input standard is set through the following menu.
VIDEO MODE
PAL NTSC
The user can choose between:
• PAL (625 lines, 50 Hz)
• NTSC (525 lines, 60 Hz)
Setting Audio Input Parameters and Audio Level
The audio input mode is set through the following menu:
AUDIO INPUT
analog SDI
Operator choice includes:
• ANALOG: analog audio (line level)
• SDI:
The Operator can adjust the left and right audio level from –10 dBu to +4 dBu, via the following menus:
AUDIO LEVEL LEFT
+ 3 dBu
AUDIO LEVEL RIGHT
- 6 dBu
For instance, setting a value of –6 dBu means that the CARRY-CODER II is adjusted for a nominal input level of -6 dBu. This
ensures headroom for A:D (analog-to-digital) conversion of approximately 18 dBFs (relative to full scale).
When the nominal audio input level is below the value that is set, the system will operate correctly, but the signal-to-noise ratio will
be degraded and the nominal audio output level on the receiving side will, in like manner, be low.
If the nominal audio input level exceeds the set value, expect digital clipping to occur.
If the nominal audio input level exceeds the absolute maximum value of +4 dBu, the audio signal will be heavily
clipped and there will be significant loss of audio quality.
Configuring Data Input (RS-232)
The CARRY-CODER II provides an RS-232 input port that can be used for asynchronous user data transmission (i.e. for sending
the transmitter’s GPS-derived location data to a receiver tracking antenna system).
The RS-232 input is configured through the following menu:
DATA PORT BAUD RATE
1.2 4.8 9.6